B1985

B1985-POWER LIFTGATE LATCH CONTROL 2 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 DTC's.
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 B1985-POWER LIFTGATE LATCH CONTROL 2 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 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 between the (Q84) Liftgate Latch Cinch Driver circuit and ground
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 Liftgate Cinch/Release Motor connector.
Measure the voltage between the (Q84) Liftgate Latch Cinch Driver circuit and ground in the PLG Module C2 harness connector.
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 SHORT TO VOLTAGE




Turn the ignition on
Measure the voltage of the (Q85) Liftgate Latch Release Driver circuit in the PLG Module C2 harness connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is there any voltage present?

Yes

- Repair the (Q85) Liftgate Latch Release Driver circuit for a short to voltage.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6. CHECK THE POWER LIFTGATE LATCH CINCH DRIVER




Turn the ignition off.
Reconnect the Power Liftgate Module C2 harness connector.
Turn the ignition on.
While using the scan tool to actuate the Power Liftgate Latch Cinch motor, measure the voltage between the (Q84) Liftgate Latch Cinch Driver circuit and ground.
Is the voltage above 12 volts?

No

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

Yes

- Go To 7

7. CHECK THE POWER LIFTGATE LATCH RELEASE DRIVER




Turn the ignition on
While using the scan tool to actuate the Power Liftgate Latch Release Motor, measure the voltage between the (Q85) Liftgate Latch Release Driver circuit and ground.
Is the voltage above 12 volts?

No

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

Yes

- Replace the Liftgate Cinch/Release Motor Assembly.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test