B1952-POWER LIFTGATE DRIVE MOTOR - INCORRECT DIRECTION
For a complete wiring diagram Refer to Section 8W
- 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.
| Possible Causes |
| (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO THE (Q89) LIFTGATE CLOSE DRIVER CIRCUIT |
| (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORTED TO THE (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT |
| (Q204) POSITION SENSOR SIGNAL 1 SHORT TO GROUND |
| (Q204) POSITION SENSOR SIGNAL 1 SHORT TO VOLTAGE |
| (Q204) POSITION SENSOR SIGNAL 1 OPEN |
| POWER LIFTGATE DRIVE UNIT |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith the scan tool, record DTCs.
Erase DTCs.
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 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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO GROUND
Disconnect the Power Liftgate Module C1 harness connector.
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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 3
3. (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 4
4. (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT OPEN
Turn the ignition off.
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?
No
- Repair the (Q204) Position Sensor Signal 1 circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
Yes
- Go To 5
5. CHECK THE (Q88) LIFTGATE OPEN DRIVER CIRCUIT AND THE (Q89) LIFTGATE CLOSE DRIVER CIRCUITS FOR A SHORT TOGETHER
Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Disconnect the Power Liftgate Drive Unit harness connector.
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?
No
- Go To 6
Yes
- Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
6. CHECK (Q204) POSITION SENSOR SIGNAL 1 AND THE (Q205) POSITION SENSOR SIGNAL 2 CIRCUITS FOR A SHORT TOGETHER
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?
No
- 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).
Yes
- Repair any obvious wiring problems as necessary. If the wiring is 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).