B1941
B1941-92-POWER LIFTGATE POSITION SENSOR 2 - PERFORMANCE OR INCORRECT OPERATION
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
Whenever the Power Liftgate is power opening or closing.
- Set Condition:
When the Power Liftgate Module senses the (Q205) Position Sensor Signal 2 circuit not pulsing during motor operation, this code will set.
1. DTC PRESENT
1. With the scan tool, record the DTCs.
2. Erase the DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. If possible, operate the liftgate several times.
5. With the scan tool, read the Active DTCs.
Does the scan tool display; B1941-92-POWER LIFTGATE POSITION SENSOR 2 - PERFORMANCE OR INCORRECT OPERATION?
Yes
- Go To 2
No
- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
2. (Q901) LOGIC GROUND OPEN
1. Turn the ignition off.
2. Disconnect the Power Liftgate Drive Unit harness connector.
3. Disconnect the Power Liftgate Module C2 harness connector.
4. Measure the resistance of both of the (Q901) Logic Ground circuits between the Power Liftgate Drive Unit harness connector and the Power Liftgate Module C2 harness connector.
Is the resistance below 2.0 Ohms?
Yes
- Go To 3
No
- Repair the (Q901) Logic Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
3. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO GROUND
1. Disconnect the Power Liftgate Module C1 harness connector.
2. Measure the resistance between ground and the (Q205) Position Sensor Signal 2 circuit
Is the resistance below 10K Ohms?
Yes
- Repair the (Q205) Position Sensor Signal 2 circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 4
4. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage between ground and the (Q205) Position Sensor Signal 2 circuit
Is there any voltage present?
Yes
- Repair the (204) Position Sensor Signal 2 circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 5
5. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT OPEN
1. Turn the ignition off.
2. Measure the resistance of the (Q205) Position Sensor Signal 2 circuit between the PLG C1 connector and the Power Drive Unit connector.
Is the resistance below 2.0 Ohms?
Yes
- Go To 6
No
- Repair the (Q205) Position Sensor Signal 2 circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
6. (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN
1. 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 2.0 Ohms?
Yes
- Go To 7
No
- Repair the (Q203) Position Sensor Supply circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
7. (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
1. Measure the resistance between ground and the (Q203) Position Sensor Supply circuit.
Is the resistance below 10K Ohms?
Yes
- Repair the (Q203) Position Sensor Supply circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 8
8. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO THE (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT
1. Measure the resistance between the (Q205) Position Sensor Signal 2 circuit and the (Q204) Position Sensor Signal 1 circuit
Is the resistance below 10K Ohms?
Yes
- Repair the (Q205) Position Sensor Signal 2 circuit for a short to the (Q204) Position Sensor Signal 1 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 9
9. POWER LIFTGATE MODULE
1. Reconnect the Power Liftgate Module C1 harness connector.
2. Reconnect the Power Liftgate Module C2 harness connector.
3. Reconnect the Power Liftgate Drive Unit harness connector.
4. Turn the ignition on.
5. While back probing, measure the voltage between ground and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit harness connector.
NOTE: The graphic shows the terminal end of the connector, back probe the wire end.
Is the voltage approximately 5.0 volts?
Yes
- Go To 10
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Replace the Power Liftgate Module. Power Liftgate Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
10. POWER LIFTGATE MODULE
1. While back probing, measure the voltage between ground and the (Q205) Liftgate Position Sensor 2 Signal circuit in the Power Liftgate Drive Unit harness connector.
NOTE: The graphic shows the terminal end of the connector, back probe the wire end.
Slowly lower and raise the liftgate while observing the voltmeter.
Does the voltage change from approximately 0.0 volts to 4.7 volts as the liftgate is moved?
Yes
- Test Complete.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Replace the Power Liftgate Drive Unit. Power Liftgate Drive Unit - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.