B1643

B1643-REAR LEFT TURN CONTROL CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the Turn Signal activated.

- Set Condition:
When the Totally Integrated Power Module (TIPM) detects a low condition.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all TIPM DTCs.
3. Turn the Left Turn Signals on.
4. With the scan tool, read DTCs.

Does the scan tool read: B1643-REAR LEFT TURN CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (L63) LEFT TURN SIGNAL CONTROL CIRCUIT
1. Turn the ignition off.
2. Disconnect the TIPM C3 connector.
3. Disconnect the Left Tail Lamp Assembly C1 harness connector.
4. Measure the resistance between ground and the (L63) Rear Left Rear Turn Signal Control circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (L63) Rear Left Turn Signal Control circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Totally Integrated Power Module (TIPM). Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.