B1981

B1981-POWER LIFTGATE LATCH CONTROL 1 CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Anytime the Power Liftgate is in a latch cinch or release operation.

- Set Condition:
When the liftgate latch motor cinch or release output is pulled high prior to or during a latch cinch or release operation, this code will set.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record and erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power liftgate several times if possible.
With the scan tool, read DTCs.
If the B210E-BATTERY VOLTAGE HIGH DTC is present, repair that code before proceeding.
Does the scan tool display B1981-POWER LIFTGATE LATCH CONTROL 1 CIRCUIT HIGH?

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 conditions in the latch assembly.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. LIFTGATE LATCH CIRCUIT OPEN




Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance between the (Q84) Liftgate Latch Cinch Driver circuit and the (Q85) Liftgate Latch Release Driver Circuit.
Is the resistance approximately 4.0 ohms?

No

- Go To 4

Yes

- Go To 3

3. POWER LIFTGATE MODULE




Turn the ignition on.
Measure the voltage of the (Q84) Liftgate Latch Cinch Driver circuit.
Is there any voltage present?

No

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

Yes

- Go To 4

4. (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO VOLTAGE




Disconnect the Power Liftgate Latch harness connector.
Measure the voltage of the (Q84) Liftgate Latch Cinch Driver circuit.
Is there any voltage present?

Yes

- Repair the (Q84) Liftgate Latch Cinch Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To 5

5. (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT OPEN




Measure the resistance of the (Q85) Liftgate Latch Release Driver circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
Is the resistance below 5.0 ohms?

Yes

- Go To 6

No

- Repair the (Q85) Liftgate Latch Release Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

6. POWER LIFTGATE MODULE
With the scan tool under PLGM, monitor the PAWL SWITCH STATUS.
Using a screwdriver, click the latch to the first detent while observing the scan tool.
Unlatch the latch by pressing the handle switch and observe the scan tool for a change of state.
Repeat this step several times while moving the liftgate in different positions and wiggling the harness to check for an intermittent open circuit.
Did the scan tool show the switch state changing correctly every time?

Yes

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

No

- Check the Power Liftgate Module and Power Liftgate Latch harness and connectors for damage, and repair as necessary. If the Power Liftgate Module and Power Liftgate Latch harness and connectors are OK, replace the Power Liftgate Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.