B1966-POWER LIFTGATE SENSOR SUPPLY HIGH
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Whenever the Power Liftgate Module is awake.
- Set Condition:
The Power Liftgate Module has detected the Position Sensor Supply voltage is above 5.5 volts.
| Possible Causes |
| (Q901) LOGIC GROUND OPEN |
| (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN |
| (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO BATTERY |
| POWER LIFTGATE DRIVE UNIT |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith the scan tool, record DTC's and any liftgate inhibitors.
Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the scan tool, read DTCs.
Does the scan tool display B1966–POWER LIFTGATE SENSOR SUPPLY HIGH?
Yes
- Go To 2
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. (Q901) LOGIC GROUND OPEN
Turn the ignition off.
Disconnect the Power Liftgate Drive Unit connector.
Measure the resistance between the (Z800) Ground and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit connector.
Is the resistance below 9.5 ohms?
Yes
- Go To 3
No
NOTE: The (Q901) Logic Ground circuit is grounded through the Power Liftgate Module and the (Z800) Ground circuit.
Repair the (Q901) Logic Ground circuit for an open.- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
Measure the voltage between the (Q901) Logic Ground circuit and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit connector.
Is the voltage above 5.5 volts?
Yes
- Repair the (Q203) Position Sensor Supply circuit for a short to voltage. If the power liftgate is inoperative after repairing the (Q203) Position Sensor Supply circuit, replace the Power Liftgate Drive Unit in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go to 4
4. (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN
Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Measure the resistance of the (Q203) Position Sensor Supply circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.
Is the resistance below 5.0 ohms?
Yes
- 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).
No
- Repair the (Q203) Position Sensor Supply circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).