B1985
B1985 - POWER LIFTGATE LATCH CONTROL 2 CIRCUIT HIGHB1985 - Power Liftgate Latch Control 2 Circuit High:
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.
POSSIBLE CAUSES
- High battery voltage
- (Q84) Liftgate latch cinch driver circuit short to voltage
- (Q85) Liftgate latch release driver circuit short to voltage
- (Q84) Liftgate latch cinch driver circuit open
- (Q85) Liftgate latch release driver circuit open
- Latch assembly
- Power liftgate module
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.
Q: 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.
Q: Is the resistance approximately 4.0 ohms?
NO: Go to 5
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
Q: 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 connector.
Measure the voltage between the (Q84) Liftgate Latch Cinch Driver circuit and ground.
Q: 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: Repair the (Q85) Liftgate Latch Release Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
5. (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT OPEN
Disconnect the Power Liftgate Latch connector.
Measure the resistance of the (Q85) Liftgate Latch Release Driver circuit between the PLG C2 connector and the Latch connector.
Q: 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. (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT OPEN
Measure the resistance of the (Q84) Liftgate Latch Cinch Driver circuit between the PLG C2 connector and the Latch connector.
Q: Is the resistance below 5.0 ohms?
YES: Replace the Liftgate Latch assembly. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (Q84) Liftgate Latch Cinch Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test