B1942

B1942-POWER LIFTGATE POSITION SENSOR 2 CIRCUIT PERFORMANCE





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL


- 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.






Diagnostic Test


1. DTC PRESENT
With the scan tool, record DTC's.
Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
If possible, operate the liftgate several times.
With the scan tool, read DTCs.
Does the scan tool display B1942-POWER LIFTGATE POSITION SENSOR 2 CIRCUIT PERFORMANCE?

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.Body Verification Test.


2. (Q901) LOGIC GROUND OPEN




Turn the ignition off.
Disconnect the Power Liftgate Drive Unit harness connector.
Disconnect the Power Liftgate Module C2 harness connector.
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 2.0ohms?

Yes


- Go To 3


No


- Repair the (Q901) Logic Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


3. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORT TO GROUND




Disconnect the Power Liftgate Module C1 harness connector.
Measure the resistance between ground and the (Q205) Position Sensor Signal 2 circuit
Is the resistance below 10000.0 ohms?

Yes


- Repair the (Q205) Position Sensor Signal 2 circuit for a short to ground.


No


- Go To 4


4. Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORT TO VOLTAGE




Turn the ignition on.
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 BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Go To 5



5. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT OPEN




Turn the ignition off.
Measure the resistance of the (Q205) Position Sensor Signal 2 circuit between the PLG C1 connector and the Drive Unit connector.
Is the resistance below 5.0 ohms?

No


- Repair the (Q205) Position Sensor Signal 2 circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


Yes


- Go To 6


6. (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN




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


- Go To 7


No


- Repair the (Q203) Position Sensor Supply circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


7. (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO GROUND




Measure the resistance between ground and the (Q203) Position Sensor Supply circuit.
Is the resistance below 10000.0 ohms?

No


- Go To 8


Yes


- Repair the (Q203) Position Sensor Supply circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


8. (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT




Measure the resistance between the (Q205) Position Sensor Signal 2 circuit and the (Q204) Position Sensor Signal 1 circuit
Is the resistance below 10000.0 ohms?

Yes


- Repair the (Q205) Position Sensor Signal 2 circuit for a short to the (Q204) Position Sensor Signal 1 circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Go To 9


9. POWER LIFTGATE MODULE




Reconnect the Power Liftgate Module C1 connector.
Turn the ignition on.
Measure the voltage between ground and the (Q205) Position Sensor Signal 2 circuit and the (Q203) Position Sensor Supply in the Power Liftgate Drive Unit harness connector.
Is the voltage approximately 5.0 volts for both measurements?

Yes


- Replace the Power Liftgate Drive Unit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Replace the Power Liftgate Module.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.