TAILGATE LOCK MOTOR SHORT TO VOLTAGE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Whenever the ignition is on.
- Set Condition:
When the BCM detects voltage on either the Tailgate Lock Driver or Unlock Driver circuit for longer than 5 seconds when the Tailgate is not being actuated. If there is, the BCM will disable the lock functions to protect the BCM.
| Possible Causes |
| TAILGATE (P30) LOCK OR (P31) UNLOCK CIRCUIT SHORT TO VOLTAGE |
| JUNCTION BLOCK - SHORT TO VOLTAGE |
| BODY CONTROL MODULE |
Diagnostic Test
1. CHECK TROUBLE CODETurn the ignition on.
With the scan tool, erase DTCs.
Cycle the ignition switch from Off to On and wait 10 seconds.
With the scan tool , read DTCs.
Does the scan tool display TAILGATE LOCK MOTOR SHORT TO VOLTAGE?
Yes
- Go To2
No
- Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. CHECK TAILGATE LOCK OR UNLOCK CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Junction Block C2 connector.
Turn the ignition on.
Measure the voltage between (P30) Tailgate Lock Driver circuit and ground.
Is there any voltage present?
Yes
- Repair the Tailgate (P30) Lock or (P31) Unlock Driver for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To3
3. CHECK JUNCTION BLOCK FOR A SHORT TO VOLTAGE
Turn the ignition off.
Remove the Body Control Module from the Junction Block.
NOTE: Ensure the Junction Block C1, C2 and C3 connectors are connected at this time.
Turn the ignition on.
Measure the voltage between the (P30) Tailgate Lock Driver circuit in the Junction Block - BCM connector and ground.
Measure the voltage between the (P31) Tailgate Unlock Driver circuit in the Junction Block - BCM connector and ground.
Is there any voltage present on either circuit?
Yes
- Replace the Junction Block in accordance with service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Body Control Module in accordance with service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)