B1959-POWER LIFTGATE DRIVE CLUTCH CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Whenever the Power Liftgate is power opening or closing.
- Set Condition:
The Power Liftgate Module has detected the clutch driver circuit current is under 0.5 amps.
| Possible Causes |
| (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT SHORT TO VOLTAGE |
| (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT OPEN |
| (Z800) GROUND OPEN |
| POWER LIFTGATE DRIVE UNIT |
| POWER LIFTGATE MODULE |
Diagnostic Test
1. DTC PRESENTWith the scan tool, record DTCs and any liftgate inhibitors.
Erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the scan tool, read DTCs.
Does the scan tool display B1959–POWER LIFTGATE DRIVE CLUTCH CONTROL CIRCUIT HIGH?
Yes
- Go To 2
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Turn the ignition on.
Measure the voltage of the (Q201) Liftgate Clutch Driver circuit between the Power Liftgate C1 harness connector and ground.
Is there any voltage present?
No
- Go To3
Yes
- Repair the (Q201) Liftgate Clutch Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (Q201) LIFTGATE CLUTCH DRIVER CIRCUIT OPEN
Disconnect the Power Liftgate Drive Unit connector
Measure the resistance of the (Q201) Liftgate Clutch Driver circuit between the Power Liftgate C1 harness connector and the Power Liftgate Drive Unit harness connector.
Is the resistance below 2.0 ohms?
Yes
- Go To4
No
- Repair the (Q201) Liftgate Clutch Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. CHECK THE (Z800) GROUND CIRCUIT FOR AN OPEN
Measure the resistance between ground and the (Z800) Ground circuit in Power Liftgate Drive Unit connector.
Is the resistance below 2.0 ohms?
Yes
- Replace the Power Liftgate Drive Unit in accordance with the service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair the (Z800) Ground circuit for an open. If the (Z800) Ground circuit is OK, 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).