B197C-POWER LIFTGATE CLOSE DIRECTION- PAWL SWITCH PERFORMANCE
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Whenever the power liftgate is performing a closing operation.
- Set Condition:
The pawl switch was not detected as open when the Power Liftgate Drive Unit Position Sensor count is greater than 90.
| Possible Causes |
| (Q901) LOGIC GROUND CIRCUIT OPEN |
| (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT OPEN |
| (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT SHORT TO VOLTAGE |
| POWER LIFTGATE LATCH |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith the scan tool, record and erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power liftgate several times if possible.
With the scan tool, read ACTIVE DTCs.
Does the scan tool display B197C–POWER LIFTGATE CLOSE DIRECTION - PAWL SWITCH PERFORMANCE?
Yes
- Go To2
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the door several times and check for any binding or other obstructions.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. BINDING LIFTGATE
Examine the liftgate for proper fit and alignment, loose/hard or torn seals, misaligned latch striker or anything that would cause an obstruction to proper operation.
Manually operate the liftgate of a known good vehicle and notice the effort needed to open and close.
Compare the effort needed on the disabled liftgate.
Especially notice the effort needed to unlatch and close the liftgate.
Does it take more effort to operate the liftgate than it should?
Yes
- Refer to Service information for the related symptom(s).
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To3
3. (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
Disconnect the Power Liftgate Latch harness connector.
Measure the voltage between the (Q901) Logic Ground circuit and the (Q60) Liftgate Pawl Switch Sense circuit.
Wiggle the harness while observing the voltmeter.
Is there any voltage present?
No
- Go To 4
Yes
- Repair the (Q60) Liftgate Pawl Switch Sense circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. (Q901) LOGIC GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance of the (Q901) Logic Ground circuit between the Power Liftgate C2 harness connector and the Power Liftgate Latch harness connector.
Wiggle the harness while observing the ohmmeter.
Is the resistance below 2.0 ohms?
Yes
- Go To5
No
- Repair the (Q901) Logic Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
5. (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT OPEN
Measure the resistance of the (Q60) Liftgate Pawl Switch Sense circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
Wiggle the harness while observing the ohmmeter.
Is the resistance below 2.0 ohms?
Yes
- Go To6
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair the (Q60) Liftgate Pawl Switch Sense circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
6. POWER LIFTGATE MODULE
With the scan tool under PLGM, monitor the PAWL SWITCH STATUS.
Using a screwdriver, click the latch to the first detent while observing the scan tool.
Unlatch the latch by pressing the handle switch and observe the scan tool for a change of state.
Repeat this step several times while moving the liftgate in different positions and wiggling the harness to check for an intermittent open circuit.
Did the scan tool show the switch state changing correctly every time?
Yes
- Replace the Power Liftgate Latch in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Check the Power Liftgate Module and Power Liftgate Latch harness and connectors for damage, and repair as necessary. If the Power Liftgate Module and Power Liftgate Latch harness and connectors are OK, replace the Power Liftgate Module in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).