B1954

B1954-POWER LIFTGATE LATCH CINCH - EXCESSIVE TIME





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

- When Monitored:
Whenever the power liftgate is performing a cinching operation.

- Set Condition:
The latch motor should perform its operation within 4 seconds. When it takes longer for the cinch operation, this code will set.





1. DTC PRESENT

NOTE: If there are any other Power Liftgate DTCs present, correct them before proceeding with this test.

1. Make sure the battery is fully charged and vehicle charging system is operating properly.
2. Make sure the liftgate is closed and with the scan tool, run the "Latch Home Position Test" before proceeding to ensure the latch is positioned correctly.
3. With the scan tool, record and erase the DTCs.
4. Turn the ignition off, wait 10 seconds, then turn the ignition on.
5. Operate the power liftgate several times if possible.
6. With the scan tool, read ACTIVE DTCs.

Does the scan tool display B1954-POWER LIFTGATE LATCH CINCH - EXCESSIVE TIME?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding or other obstructions.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. BINDING LIFTGATE
1. Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop assembly, loose/hard weatherstrip, and track assembly for wear or anything that would cause an obstruction to proper operation.
2. If necessary manually operate the power liftgate on a known good vehicle and notice the effort needed to open and close for comparison.
3. Especially notice the effort needed to unlatch and close the liftgate.

Were there any mechanical problems found?

Yes

- Refer to Service information for the related symptom(s).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C2 and C3 harness connectors.
3. Check connectors for corrosion, damage, or pushed out terminals. Repair as necessary.
4. Reconnect the PLG C3 harness connector.
5. Disconnect the Power Liftgate Latch connector.
6. Measure the resistance of the (Q84) Liftgate Latch Cinch Driver circuit between the Power Liftgate Module C2 connector and the Power Liftgate Latch connector.
7. Wiggle the harness and check for an intermittent open condition.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (Q84) Liftgate Latch Cinch Driver circuit for an open or high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (Q85) Liftgate Latch Release Driver circuit between the Power Liftgate Module C2 connector and the Power Liftgate Latch connector.
2. Wiggle the harness and check for an intermittent open condition.

Is the resistance below 5.0 Ohms?

Yes

- Go To 5

No

- Repair the (Q85) Liftgate Latch Release Driver circuit for high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE (Q901) LOGIC GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (Q901) Logic Ground circuit between the PLG Module C2 harness connector and the PLG Latch harness connector.
2. Wiggle the harness and check for an intermittent short condition.

Is the resistance below 5.0 Ohms?

No

- Repair the (Q901) Sensor Ground circuit for high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 6

6. CHECK THE (G78) LIFTGATE AJAR SWITCH SENSE CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (G78) Liftgate Ajar Switch Sense circuit between the PLG C2 connector and the PLG Latch connector.
2. Wiggle the harness and check for an intermittent open condition.

Is the resistance below 5.0 Ohms?

No

- Repair the (G78) Liftgate Ajar Switch Sense circuit for an open or high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

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