B1644-REAR LEFT TURN CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Continuously
- Set Condition:
When the Front Control Module detects a short to battery on the Control circuit.
| Possible Causes |
| (L63) TURN SIGNAL CONTROL CIRCUIT |
| POWER DISTRIBUTION CENTER |
| FRONT CONTROL MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.
Clear all FCM DTC's.
Turn the Left Turn Signal on.
With the scan tool, read DTC's.
Does the scan tool read: B1644-REAR LEFT TURN CONTROL CIRCUIT HIGH?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. LEFT REAR TURN SIGNAL BULB
Turn the ignition off.
Inspect the Left Rear Turn Signal Bulb Assembly.
Is the inoperative bulb OK?
Yes
- Go To 3
No
- Replace the Inoperative bulb in accordance with the service information.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
3. L63 LEFT TURN SIGNAL CONTROL CIRCUIT
Turn the ignition off.
Disconnect the IPM C2 connector.
Disconnect the Left Rear Tail Lamp assembly.
Measure the resistance of the (L63) Left Rear Turn Signal Control circuit.
Is the resistance above 5.0 ohms?
Yes
- Repair the (L63) Turn Signal Control circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 4
4. FRONT CONTROL MODULE
Turn the ignition off.
Disconnect the Front Control Module from the PDC 49–way connector.
Measure the voltage between (L63) Left Rear Turn Signal Control circuit and ground in the PDC.
Is there any voltage present?
Yes
- Replace the Power Distribution Center.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Front Control Module.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)