B1985-POWER LIFTGATE LATCH CONTROL 2 CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Anytime the Power Liftgate is performing a power cinch or release operation.
- Set Condition:
When either 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.
| Possible Causes |
| (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO VOLTAGE |
| (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT SHORT TO VOLTAGE |
| POWER LIFTGATE LATCH ASSEMBLY |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith 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 B1985–POWER LIFTGATE LATCH CONTROL 2 CIRCUIT HIGH?
Yes
- Go To2
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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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 and the (Q85) Liftgate Latch Release Driver circuits.
Is there any voltage present?
No
- Replace the Power Liftgate Module in accordance with service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
Yes
- Go To 4
4. CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
Disconnect the Power Liftgate Latch harness connector.
Measure the voltage of the (Q84) Liftgate Latch Cinch Driver and the (Q85) Liftgate Latch Release Driver circuits.
Is there any voltage present?
Yes
- Repair the (Q84) Liftgate Latch Cinch Driver or the (Q85) Liftgate Latch Release Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 5
5. 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 in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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 in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).