B1952

B1952-POWER LIFTGATE DRIVE MOTOR - INCORRECT DIRECTION





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Whenever the Power Liftgate Motor is in operation.

- Set Condition:
When the Power Liftgate Module senses the direction of the drive motor is in opposition to the direction it is trying to drive the liftgate, this code will set.





1. DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record DTCs.
2. Erase DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. If possible, operate the liftgate several times.
5. Using the scan tool, read DTCs.

Does the scan tool display B1952-POWER LIFTGATE DRIVE MOTOR - INCORRECT DIRECTION?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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




1. Disconnect the Power Liftgate Module C1 harness connector.
2. Measure the resistance between ground and the (Q204) Position Sensor Signal 1 circuit.

Is the resistance below 10000.0 Ohms?

Yes

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

No

- Go To 3

3. (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition on.
2. Measure the voltage between ground and the (Q204) Position Sensor Signal 1 circuit.

Is there any voltage present?

Yes

- Repair the (204) Position Sensor Signal 1 circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT OPEN




1. Turn the ignition off.
2. Measure the resistance of the (Q204) Position Sensor Signal 1 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 5

No

- Repair the (Q204) Position Sensor Signal 1 circuit for an open.
- Perform the BODY VERIFICATION TEST Body Verification Test.

5. CHECK THE (Q88) LIFTGATE OPEN DRIVER CIRCUIT AND THE (Q89) LIFTGATE CLOSE DRIVER CIRCUITS FOR A SHORT TOGETHER




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit in the Power Liftgate Module C1 harness connector.

Is the resistance below 1000 Ohms?

Yes

- Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Go To 6

6. CHECK (Q204) POSITION SENSOR SIGNAL 1 AND THE (Q205) POSITION SENSOR SIGNAL 2 CIRCUITS FOR A SHORT TOGETHER




1. Inspect the (Q204) Position sensor signal 1 circuit and the (Q205) Position Sensor Signal 2 circuits for a possible short together between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.

Are the circuits shorted at either connector?

Yes

- Repair any obvious wiring problems as necessary. If the wiring is OK, replace the Power Liftgate Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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