B1980

B1980-POWER LIFTGATE LATCH CONTROL 1 CIRCUIT LOW





For a complete wiring diagram Refer to the Wiring Information

- 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 low prior to or during a latch cinch or release operation, this code will set.





1. DTC PRESENT
1. With the scan tool, record and erase DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the power liftgate several times if possible.
4. With the scan tool, read DTCs.
5. If the B210D-BATTERY VOLTAGE LOW DTC is present, repair that code before proceeding.

Does the scan tool display B1980-POWER LIFTGATE LATCH CONTROL 1 CIRCUIT LOW?

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 the BODY VERIFICATION TEST. Body Verification Test.

2. BINDING LIFTGATE LATCH
1. Examine the liftgate for proper alignment, worn or binding hinges, latch alignment or anything that would cause an obstruction to proper operation.
2. With an open liftgate, manually close the latch and open it with the handle switch several times.

Were there any mechanical problems found?

Yes

- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT FOR A SHORT TO THE (Q901) LOGIC GROUND




1. Turn the ignition off.
2. Disconnect the Power Liftgate Latch harness connector.
3. Measure the resistance between the (Q901) Logic Ground circuit and the (Q84) Liftgate Latch Cinch Driver circuit in the Power Liftgate Latch harness connector.
4. Wiggle the harness and check for an intermittent short circuit condition.

Is the resistance below 100.0 ohms?

Yes

- Repair the (Q84) Liftgate Latch Cinch Driver circuit for a short to the (Q901) Logic Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK THE (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT FOR A SHORT TO THE (Q901) LOGIC GROUND




1. Measure the resistance between the (Q901) Logic Ground circuit and the (Q85) Liftgate Latch Release Driver circuit in the Power Liftgate Latch harness connector.
2. Wiggle the harness and check for an intermittent short circuit condition.

Is the resistance below 100.0 ohms?

Yes

- Repair the (Q85) Liftgate Latch Release Driver circuit for a short to the (Q901) Logic Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. CHECK THE (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT FOR A SHORT TO GROUND




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

Is the resistance below 10000.0 ohms?

Yes

- Repair the (Q85) Liftgate Latch Release Driver circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 6.

6. CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (Q84) Liftgate Latch Cinch Driver circuit.
2. Wiggle the harness and check for an intermittent short circuit condition.

Is the resistance below 10000.0 ohms?

Yes

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

No

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