DIAGNOSIS AND TESTING

POWER LIFTGATE SYSTEM

In order to obtain conclusive testing of the power liftgate system, the Controller Area Network (CAN) data bus, and all of the electronic modules that provide inputs to, or receive outputs from the power liftgate system components must be checked. Any diagnosis of the power liftgate system should begin with, the use of a scan tool and the appropriate diagnostic service information.

Refer to the appropriate wiring information for complete circuit schematic or connector pin-out information.

NOTE: Before any testing of the power liftgate system is attempted, the battery should be fully-charged.

Following are quick reference diagnostic tables to help when diagnosing and testing the power liftgate system.

SYMPTOM DRIVEN POWER LIFTGATE SYSTEM DIAGNOSIS TABLE

CONDITION	POSSIBLE CAUSES	CORRECTION
LIFTGATE OPENS UNEXPECTEDLY	Accidental activation or failure of open/close command switch	Check for shorted or defective switch
	Failure of latch assembly	Check wiring connections
		Check for trouble codes, replace latch if necessary
	Failure of power liftgate control module	Disconnect then reconnect battery to reset module. Operate power liftgate. If no function exists check for loose wire connections, repair as necessary
LIFTGATE WILL NOT OPEN/CLOSE AUTOMATICALLY	Not in park/neutral or false indication	Check switch status with scan tool
	Battery voltage too low	Check for proper battery system voltage
	Blown fuse	Check for blown fuse
	Gas prop rod failure	Check condition of liftgate prop rods
	Power liftgate control module critical fault codes	Check code status with scan tool
	Failure of latch assembly	Check ratchet and pawl switch status with scan tool
		Check secondary and sector switch status with scan tool
		Check for foreign matter or damaged components preventing the operation of latch assembly. Replace latch assembly, if necessary
		Check wire connections and for blown fuse
	Failure of power liftgate drive unit	Test power liftgate drive unit
	Extreme temperatures	No repair, refer to power liftgate system inhibitors
	Vehicle speed greater than zero	Test for proper operation with vehicle stopped
	Pinch sensor activated or open circuit	Check pinch sensor status with scan tool
	Binding or sticking of components	Establish location of binding and replace necessary components
	Check Inhibit Monitors with scan tool, refer to thePOWER LIFTGATE SYSTEM INHIBIT MONITORS TABLE	Repair as necessary
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
POWER LOSS DURING LIFTGATE OPERATION	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
	Low battery voltage	Charge or replace battery
	Failure of power liftgate control module	Check for diagnostic trouble codes with scan tool
	Failure of power liftgate drive unit	Test power liftgate drive unit
NO AUTOMATIC LATCHING IN PRIMARY AND/OR SECONDARY POSITIONS	Failure of latch assembly	Check wire connections and for blown fuse
		Check for diagnostic trouble codes and cycle with scan tool
		Cycle latch with scan tool and check for foreign matter preventing the operation of latch assembly. Replace latch assembly, if necessary
	Binding or sticking of components	Establish location of binding and replace necessary components
	Failure of power liftgate control module	Check for diagnostic trouble codes with scan tool
	Door seal force too high	Inspect seals for damage, mis-assembly, foreign matter or other possible obstruction
	Failure of power liftgate drive unit	Check for no drive condition
	Pinch sensor activated or open/short circuit	Check pinch sensor status with scan tool.
	Foreign material in latch	Check and clean latch
	Check Inhibit Monitors with scan tool, refer to thePOWER LIFTGATE SYSTEM INHIBIT MONITORS TABLE	Repair as necessary
	Blown fuse	Check fuse and replace if required
LATCH WILL NOT RELEASE FROM PRIMARY POSITION	Not in park/neutral, vehicle speed greater than zero or false indication	Check switch status with scan tool
	Vehicle doors locked	Unlock doors
	Low battery voltage	Check battery system voltage
	Blown fuse	Check fuse and replace if required
	Failure of latch assembly	Using the scan tool, perform the "Latch Home Position Test" If the "Latch Home Position Test" is unsuccessful, disconnect the battery for 60 seconds. Reconnect the battery and grab the outside handle switch and hold it for at least 20 seconds If the latch still will not release, use the scan tool and select "Actuates", "Latch Motor Release Direction". This will drive the motor longer than just using the outside handle switch If driving the latch by the "Latch Motor Release Direction" worked, perform the "Latch Home Position Test" before returning the vehicle back to the owner. If driving the latch by the "Latch Motor Release Direction" did not work, use the following procedure to open the liftgate and continue diagnosis as necessary. (Refer to 8 - ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - MANUAL LATCH RELEASE) to open the liftgate
	Latch not “Home”	Check latch sector switch circuit and attempt to “Home” latch with scan tool
	Failure of outside handle switch	Check for diagnostic trouble codes and cycle with scan tool
	Failure of power liftgate control module	Check for diagnostic trouble codes and cycle with scan tool
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
	Binding or sticking of components	Establish location of binding and replace necessary components
	Check Inhibit Monitors with scan tool, refer to thePOWER LIFTGATE SYSTEM INHIBIT MONITORS TABLE	Repair as necessary
KEY FOB OR OVERHEAD CONSOLE SWITCH DOES NOT OPERATE POWER LIFTGATE	Not in park/neutral, vehicle speed greater than zero or false indication	Check switch status with scan tool
	Low battery voltage	Check battery system voltage
	Blown fuse	Check fuse and replace if required
	Failure of latch assembly	Check ratchet and pawl switch status with scan tool
		Check secondary and sector switch status with scan tool
		Check for foreign matter or damaged components preventing the operation of latch assembly. Replace latch assembly, if necessary
	Failure of key fob	Reprogram key fob
		Replace key fob if necessary
	Failure of power liftgate control module	Check for diagnostic trouble codes and cycle with scan tool
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
	Failure of Cab Compartment Node (CCN) or the Sentry Key Remote Entry Module (SKREEM)	Check for diagnostic trouble codes and cycle liftgate with scan tool
		Replace Inoperative module as necessary
	Failure of power liftgate drive unit	Check for foreign matter preventing the drive unit from operating
		Replace drive unit as necessary
	Check Inhibit Monitors with scan tool, refer to thePOWER LIFTGATE SYSTEM INHIBIT MONITORS TABLE	Repair as necessary
LIFTGATE DOES NOT STAY OPEN	Inoperative liftgate prop rods	Replace prop rods
		Check for broken attachments
	Excessive cold or weight on liftgate	Check for added weight or extreme cold climate
HIGH OPENING EFFORT	Inoperative liftgate prop rods	Replace prop rods
		Check for broken attachments
	Drive unit jammed or did not disengage	Troubleshoot and replace components, if necessary
	Binding or sticking of components	Establish location of binding and replace necessary components
LIFTGATE CONTINUES TO CINCH CLOSED DURING POWER MODE	Failure of power liftgate control module	Check for diagnostic trouble codes and cycle with scan tool, refer to diagnostic information for detailed procedures
	Failure of latch assembly	Check ratchet and pawl switch status with scan tool
		Check secondary and sector switch status with scan tool
		Check for foreign matter or damaged components preventing the operation of latch assembly. Replace latch assembly, if necessary
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
LIFTGATE CONTINUES TO OPEN DURING POWER MODE (RUNAWAY MOTOR)	Failure of power liftgate module	Check for diagnostic trouble codes and cycle with scan tool, refer to diagnostic information for detailed procedures
	Failure of full open switch	Check switch status with scan tool
		Replace switch, if necessary
	Failure of power liftgate drive unit	Check for continuous drive condition
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
LIFTGATE OPENS VERY SLOWLY	Low battery voltage	Check battery electrical system voltage
	Failure of liftgate prop rods	Replace prop rods, if necessary
	Binding or sticking of components	Establish location of binding and replace necessary components
	Wiring problems (system or vehicle)	Troubleshoot using electrical schematics. Refer to wiring diagrams
	Grade of vehicle too steep for power operation	Operate liftgate manually
	Failure of power liftgate drive unit	Replace power liftgate drive unit, if necessary
SQUEAKS, NOISES AND RATTLES	Foreign material in door compartment	Remove foreign material
	Worn/loose components	Check and tighten/replace loose components

POWER LIFTGATE SYSTEM INHIBITORS

The power liftgate system is designed with a number of system inhibitors. These inhibitors are necessary for safety and feasibility of the power liftgate system. Refer to power liftgate system inhibitors noted below:

The Power Liftgate module will inhibit operation of the power liftgate in extreme temperatures. These temperatures will be approximately -22° F (-33° C) and 149° F (65° C). The thermistor assembly on the liftgate monitors the temperature.
The vehicle's transmission must be in park or neutral for the power liftgate to operate.
The vehicle's speed must be zero for the power liftgate to operate.
The vehicle's electrical system voltage must be within specification for the power liftgate system to operate. A low-voltage cut-off is built into the power liftgate system to prevent the vehicle's battery from discharging to the point were the vehicle cannot be operated.
If the vehicle's ignition switch is in the “START” position, the power liftgate will pause.
If multiple obstacles are detected during the same power open or close cycle, the liftgate will abort that power cycle and go into full manual operation.
If severe Diagnostic Trouble Codes (DTC's) are stored in the power liftgate control module the system may not operate.

POWER LIFTGATE SYSTEM INHIBIT MONITORS

The following is a list of inhibit monitors as observed by an appropriate scan tool.

POWER LIFTGATE SYSTEM INHIBIT MONITORS TABLE

INHIBIT MONITOR	POSSIBLE CAUSES	CORRECTION
$80 OPEN INHIBIT - VOLTAGE TOO LOW	Low or dead battery	Charge or replace battery
$82 CLOSE INHIBIT - VOLTAGE TOO LOW	Power or ground to the power liftgate module	Check power/ground circuits and repair as necessary
	Inaccurate voltage reading from the power liftgate module	Compare the power liftgate module battery reading through the scan tool with a voltmeter reading at the power liftgate module power/ground connections. If a voltage difference of 0.5V or greater is present replace the power liftgate module
$81 OPEN INHIBIT - VOLTAGE TOO HIGH	Charging system over voltage concern	Diagnose charging system and repair as necessary
$83 CLOSE INHIBIT - VOLTAGE TOO HIGH	Inaccurate voltage reading from the power liftgate module	Compare the power liftgate module battery reading through the scan tool with a voltmeter reading at the power liftgate module power/ground connections. If a voltage difference of 0.5V or greater is present replace the power liftgate module
$84 OPEN INHIBIT - TEMPERATURE TOO LOW	Temperature was below -30°C (-22°F) when the operation was attempted	Inform customer of temperature operating range
$86 CLOSE INHIBIT - TEMPERATURE TOO LOW	High resistance to thermistor circuit signal or ground	Check signal/ground circuits (including in-line connectors) and repair as necessary
	Inoperative thermistor	Allow vehicle to sit in a constant temperature environment for one hour with the liftgate open. Measure the resistance of the thermistor and compare the values with those in the thermistor section, (Refer to 8 - ELECTRICAL/POWER DOORS/ACTUATOR - DIAGNOSIS AND TESTING). If the resistance is out of range, replace the thermistor
	Inaccurate temperature reading from the power liftgate control module	Allow vehicle to sit in a constant temperature environment for one hour with the liftgate open. Check the power liftgate control module temperature reading using a scan tool. If the reading is greater than 4.5°C (8°F) off, measure the resistance of the thermistor and compare the values with those in the thermistor section, (Refer to 8 - ELECTRICAL/POWER DOORS/ACTUATOR - DIAGNOSIS AND TESTING). If the resistance is OK, replace the power liftgate control module
$85 OPEN INHIBIT - TEMPERATURE TOO HIGH	Temperature was above 65°C (149°F) when the operation was attempted	Inform customer of temperature operating range
$87 CLOSE INHIBIT - TEMPERATURE TOO HIGH	Short or partial short to ground to thermistor circuit signal	Check signal circuit and repair as necessary
	Inoperative thermistor	Allow vehicle to sit in a constant temperature environment for one hour with the liftgate open. Measure the resistance of the thermistor and compare the values with those in the thermistor section, (Refer to 8 - ELECTRICAL/POWER DOORS/ACTUATOR - DIAGNOSIS AND TESTING). If the resistance is out of range, replace the thermistor
	Inaccurate temperature reading from the power liftgate control module	Allow vehicle to sit in a constant temperature environment for one hour with the liftgate open. Check the power liftgate control module temperature reading using a scan tool. If the reading is greater than 4.5°C (8°F) off, measure the resistance of the thermistor and compare the values with those in the thermistor section, (Refer to 8 - ELECTRICAL/POWER DOORS/ACTUATOR - DIAGNOSIS AND TESTING). If the resistance is OK, replace the power liftgate control module
$88 CLOSE INHIBIT - LEFT PINCH SENSOR ACTIVE	Pinch was activated prior to activation of power close cycle	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
	Short to ground on left pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative left pinch sensor	Measure the resistance of the left pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the left pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the left pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$89 CLOSE INHIBIT - RIGHT PINCH SENSOR ACTIVE	Pinch was activated prior to activation of power close cycle	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
	Short to ground on right pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative right pinch sensor	Measure the resistance of the right pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the right pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the right pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$8A OPEN INHIBIT - NOT IN PARK/NEUTRAL	Operator attempted “power open” when vehicle was not in Park/Neutral	Inform customer of operating restrictions
	Operator attempted exterior handle switch latch release when vehicle was not in Park/Neutral	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Transmission range sensor problem	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify PRNDL status reads correctly. If NOT OK, verify proper operation of the transmission range sensor, repair as necessary.
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is correct under different voltage and driving conditions. Repair as necessary
$8B CLOSE INHIBIT - NOT IN PARK/NEUTRAL	Operator attempted “power close” when vehicle was not in Park/Neutral	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Transmission range sensor problem	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify PRNDL status reads correctly. If NOT OK, verify proper operation of the transmission range sensor, repair as necessary.
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
$8C OPEN INHIBIT - NON-ZERO VEHICLE SPEED	Operator attempted “power open” when vehicle is in Neutral and rolling	Inform customer of operating restrictions
	Operator attempted exterior handle switch latch release when vehicle was not in Park/Neutral	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Vehicle speed sensor	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify vehicle speed reads correctly. If NOT OK, verify proper operation of the vehicle speed sensor, repair as necessary.
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is correct under different voltage and driving conditions. Repair as necessary
$8D CLOSE INHIBIT - NON-ZERO VEHICLE SPEED	Operator attempted “power close” when vehicle is in Neutral and rolling	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Vehicle speed sensor	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify vehicle speed reads correctly. If NOT OK, verify proper operation of the vehicle speed sensor, repair as necessary.
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
$8E OPEN INHIBIT - IGNITION IN START POSITION	Operator attempted “power open” with the ignition in the Start position	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
$8F CLOSE INHIBIT - IGNITION IN START POSITION	Operator attempted “power close” with the ignition in the Start position	Inform customer of operating restrictions
	Ignition status problem	Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Verify proper operation of the key fob and keyless entry system. Repair as necessary
$90 OPEN INHIBIT - IN-PLANT MODE	Power Open will not function because the power liftgate control module is in the In-Plant mode	Using a scan tool, perform the power liftgate control module learn cycle, (Refer to 8 - ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - POWER LIFTGATE CONTROL MODULE LEARN CYCLE). If learn cycle does not correct the problem replace the power liftgate control module
$91 CLOSE INHIBIT - IN-PLANT MODE	Power Close will not function because the power liftgate control module is in the In-Plant mode	Using a scan tool, perform the power liftgate control module learn cycle, (Refer to 8 - ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - POWER LIFTGATE CONTROL MODULE LEARN CYCLE). If learn cycle does not correct the problem replace the power liftgate control module
$92 OPEN INHIBIT - GEAR/SPEED MISMATCH	Power Open will not function because of a conflict between the PRNDL and vehicle speed inputs	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify vehicle speed reads correctly. If NOT OK, verify proper operation of the vehicle speed sensor, repair as necessary.
		Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify PRNDL status reads correctly. If NOT OK, verify proper operation of the transmission range sensor, repair as necessary.
		Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
		The inhibitor could have been operator induced by placing the transmission in Park when the vehicle is still rolling and immediately attempting an Open liftgate command
$93 CLOSE INHIBIT - GEAR/SPEED MISMATCH	Power Close will not function because of a conflict between the PRNDL and vehicle speed inputs	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify vehicle speed reads correctly. If NOT OK, verify proper operation of the vehicle speed sensor, repair as necessary.
		Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify PRNDL status reads correctly. If NOT OK, verify proper operation of the transmission range sensor, repair as necessary.
		Verify the ignition switch status reads correctly using a scan tool. Repair as necessary
		The inhibitor could have been operator induced by placing the transmission in Park when the vehicle is still rolling and immediately attempting a Close liftgate command
$94 OPEN INHIBIT - NOT FULLY OPEN OR FULLY CLOSED	Operator induced by placing the liftgate in the primary or secondary latch position when the liftgate was open	Inform customer of proper power liftgate/latch operation
	Conflict in liftgate latch switches and full open switch	Using a scan tool, observe the liftgate latch “Full Open, Primary, Secondary, Sector and Paw” switch readings with the liftgate in the fully open position. Verify that the “Full Open, Primary, Secondary and Paw” readings are all “Closed” and the “Sector” reading is “Open”. Repair as necessary
		Using a scan tool, observe the liftgate latch “Full Open, Primary, Secondary, Sector and Paw” switch readings with the liftgate in the fully closed position. Verify that the “Full Open, Primary, Secondary, Sector and Paw” readings are all “Open”. Repair as necessary
	Full open switch	Using a scan tool, verify proper operation of the full open switch during a power liftgate cycle. Switch reading should be “closed” with the liftgate a few degrees below fully opened and “open” in all other positions. Repair as necessary
		Using a scan tool, verify proper operation of the full open switch during a manual liftgate cycle. Switch reading should be “closed” with the liftgate a few degrees below fully opened and “open” in all other positions. Repair as necessary
$95 LATCH RELEASE INHIBIT - LOCK ENGAGED	Vehicle was locked when the operator attempted to release the liftgate latch using the exterior handle switch	Inform customer of proper power liftgate/latch operation
	Invalid lock status received by the power liftgate control module	Using a scan tool observe the Bussed inputs to the power liftgate control module. Cycle the power door locks using the key fob, auto locks and interior lock switches. Verify the “Lock” status reads correctly, repair as necessary.
$96 LATCH CINCH ABORTED - LEFT PINCH SENSOR ACTIVE	Pinch was activated when liftgate latch was cinching	Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on left pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative left pinch sensor	Measure the resistance of the left pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the left pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the left pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$97 LATCH CINCH ABORTED - RIGHT PINCH SENSOR ACTIVE	Pinch was activated when liftgate latch was cinching	Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on left pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative right pinch sensor	Measure the resistance of the right pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the right pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the right pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$98 OPEN CANCELLED - HANDLE ACTIVE	Operator induced by grabbing the exterior handle switch while a “power open” cycle was taking place	Inform customer of operating restrictions
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is approximately 2.4V with handle activated and greater than 4.6V when released.
		Using a digital multi-meter, measure the resistance of the exterior handle switch. The multi-meter should read approximately 4.7K ohms activated and “open” with handle released. Repair as necessary
$99 OPEN CANCELLED - RKE ACTIVE	A “power open” cycle was cancelled during the first two seconds (while chiming) by an RKE signal	Inform customer of operating restrictions. Key fob buttons may get inadvertently pressed when in a pocket or purse. Rapid pressing of the buttons may also be the cause
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Using a scan tool, verify the key fob button status readings from the SKREEM are correct
		Verify key fob is operating properly and buttons are not sticking. Repair as necessary
$9A OPEN CANCELLED - OVERHEAD/IP ACTIVE	A “power open” cycle was cancelled during the first two seconds (while chiming) by an overhead console liftgate switch signal	Inform customer of operating restrictions. The overhead console liftgate switch may have been double pressed
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
$9B CLOSE CANCELLED - HANDLE ACTIVE	Operator induced by grabbing the exterior handle switch while a “power close” cycle was taking place	Inform customer of operating restrictions
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is approximately 2.4V with handle activated and greater than 4.6V when released.
		Using a digital multi-meter, measure the resistance of the exterior handle switch. The multi-meter should read approximately 4.7K ohms activated and “open” with handle released. Repair as necessary
$9C CLOSED CANCELLED - RKE ACTIVE	A “power close” cycle was cancelled during the first two seconds (while chiming) by an RKE signal	Inform customer of operating restrictions. Key fob buttons may get inadvertently pressed when in a pocket or purse. Rapid pressing of the buttons may also be the cause
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Using a scan tool, verify the key fob button status readings from the SKREEM are correct
		Verify key fob is operating properly and buttons are not sticking. Repair as necessary
$9D CLOSE CANCELLED - OVERHEAD/IP ACTIVE	A “power close” cycle was cancelled during the first two seconds (while chiming) by an overhead console liftgate switch signal	Inform customer of operating restrictions. The overhead console liftgate switch may have been double pressed
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
$9E CLOSE CANCELLED - LEFT PINCH SENSOR DETECTED	A “power close” cycle was cancelled during the first two seconds (while chiming) by a left pinch sensor signal	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on left pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative left pinch sensor	Measure the resistance of the left pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the left pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the left pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$9F CLOSE CANCELLED - RIGHT PINCH SENSOR DETECTED	A “power close” cycle was cancelled during the first two seconds (while chiming) by a right pinch sensor signal	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on right pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative right pinch sensor	Measure the resistance of the right pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the right pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the right pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$A0 OPEN REVERSAL - GEAR OR SPEED STATE CHANGE	Operator shifted vehicle out of Park/Neutral while a “power open” cycle was in progress	Inform customer of operating restrictions
	Vehicle speed sensor	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify vehicle speed reads correctly. If NOT OK, verify proper operation of the vehicle speed sensor, repair as necessary.
	Transmission range sensor problem	Using a scan tool observe the Bussed inputs to the power liftgate control module. Verify PRNDL status reads correctly. If NOT OK, verify proper operation of the transmission range sensor, repair as necessary.
$A1 OPEN REVERSAL - USER INPUT	Operator activated either a key fob button or overhead console liftgate switch while a “power open or close” cycle was in progress	Inform customer of operating restrictions. The overhead console liftgate switch may have been double pressed or the key fob buttons may get inadvertently pressed when in a pocket or purse. Rapid pressing of the buttons may also be the cause
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Using a scan tool, verify the key fob button status readings from the SKREEM are correct
		Verify key fob is operating properly and buttons are not sticking. Repair as necessary
$A2 CLOSE REVERSAL - USER INPUT	Operator activated either a key fob button or overhead console liftgate switch while a “power open or close” cycle was in progress	Inform customer of operating restrictions. The overhead console liftgate switch may have been double pressed or the key fob buttons may get inadvertently pressed when in a pocket or purse. Rapid pressing of the buttons may also be the cause
	Overhead console liftgate switch	Using a scan tool, observe overhead console liftgate switch reading. Verify the reading is correct under different voltage and driving conditions. Repair as necessary
	Key fob/Sentry Key Remote Entry Module (SKREEM)	Using a scan tool, verify the key fob button status readings from the SKREEM are correct
		Verify key fob is operating properly and buttons are not sticking. Repair as necessary
$A3 CLOSE REVERSAL - LEFT PINCH SENSOR DETECTED	A “power close” cycle reversed direction due to a left pinch sensor signal	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on left pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative left pinch sensor	Measure the resistance of the left pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the left pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the left pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$A4 CLOSE REVERSAL - RIGHT PINCH SENSOR DETECTED	A “power close” cycle reversed direction due to a right pinch sensor signal	Inform customer of pinch sensor operation
		Check for obstructions causing pinch sensor activation. Repair as necessary
		Check the pinch strip for areas that may be coming in contact with other parts of the vehicle
		Ensure the pinch strip is properly secured to the liftgate
	Short to ground on right pinch sensor signal circuit	Check signal circuit and repair as necessary
	Inoperative right pinch sensor	Measure the resistance of the right pinch sensor in an unpinched state. If the resistance is less than 9k ohms, replace the right pinch sensor
	Power liftgate control module	Use a scan tool to observe the voltage of the right pinch sensor with the sensor unplugged. The reading should be approximately 5V. Short the pinch sensor circuit to ground and recheck the scan tool reading. The reading should be approximately 0V. If the readings are NOT OK, replace the inoperative power liftgate control module
$A5 CLOSE REVERSAL - HANDLE ACTIVE	A “power close” cycle reversed direction due to the operator grabbing the exterior handle switch while a “power close” cycle was taking place	Inform customer of operating restrictions
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is approximately 2.4V with handle activated and greater than 4.6V when released.
		Using a digital multi-meter, measure the resistance of the exterior handle switch. The multi-meter should read approximately 4.7K ohms activated and “open” with handle released. Repair as necessary
$A6 OPEN ABORTED - HANDLE ACTIVE	Operator induced by grabbing the exterior handle switch while a “power open” cycle was taking place	Inform customer of operating restrictions
	Exterior handle switch	Using a scan tool, observe inputs to the power liftgate control module. Verify the exterior handle switch reading is approximately 2.4V with handle activated and greater than 4.6V when released.
		Using a digital multi-meter, measure the resistance of the exterior handle switch. The multi-meter should read approximately 4.7K ohms activated and “open” with handle released. Repair as necessary
$A7 OPEN OBSTACLE	An obstacle was detected while a “power open” cycle was taking place	Normal operation, inform customer of operating restrictions
	Binding or sticking of components	Using a scan tool, move liftgate manually to the “Gate Position” indicated in the Inhibit Monitor record. Establish location of obstruction/binding and replace necessary components
	The power liftgate control module is not properly calibrated	Using a scan tool, perform the power liftgate control module learn cycle, (Refer to 8 - ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - POWER LIFTGATE CONTROL MODULE LEARN CYCLE). If learn cycle does not correct the problem replace the power liftgate control module
$A8 CLOSE OBSTACLE	An obstacle was detected while a “power close” cycle was taking place	Normal operation, inform customer of operating restrictions
	Binding or sticking of components	Using a scan tool, move liftgate manually to the “Gate Position” indicated in the Inhibit Monitor record. Establish location of obstruction/binding and replace necessary components
	The power liftgate control module is not properly calibrated	Using a scan tool, perform the power liftgate control module learn cycle, (Refer to 8 - ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - POWER LIFTGATE CONTROL MODULE LEARN CYCLE). If learn cycle does not correct the problem replace the power liftgate control module
$A9 WRONG SOFTWARE VERSION	Current power liftgate control module software version does not match bootloader and possibly hardware version	If an updated software version is available, reflash the power liftgate control module. If updated software is not available, replace the power liftgate control module
$AA LATCH IS NOT NEAR SECONDARY STATE	Operator induced by placing the liftgate in the primary or secondary latch position when the liftgate was open	Inform customer of proper power liftgate/latch operation
	Wiring problem	Using a scan tool, verify that the position sensor 1 and 2 toggle between “Open” and “Closed”. If readings are inaccurate, diagnose the wiring for possible opens, or shorts to ground/voltage. Repair as necessary
	Power liftgate drive unit position sensor	Manually open the liftgate to the fully open position. Bring the liftgate down to just before the latch contacts the striker. Using a scan tool, observe the “gate position counts”. If the count is greater than 20, replace the inoperative power liftgate drive unit
	Power liftgate control module	Using a scan tool, observe the position sensor 1 and 2 status. Disconnect the power liftgate drive unit electrical connector. Apply opens and grounds to the position sensor signal circuits. Verify the power liftgate control module reads the correct “Open/Closed” status. If readings are NOT OK, replace the power liftgate control module
$AB OPEN INHIBIT - VTA ARMED	The overhead console liftgate switch would not initiate a “power open” cycle because the Vehicle Theft Alarm (VTA) was armed	Normal operation, inform customer of operating restrictions
	Invalid VTA status	Verify proper operation of the VTA system and instrument cluster or Cab Compartment Node (CCN) bussed outputs using a scan tool and the appropriate diagnostic information. Repair as necessary