B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
- With the Headlamps activated.
- Set Condition:
- When the FCM detects a HIGH condition.
| Possible Causes |
| (L33) HIGH BEAM CONTROL CIRCUIT |
| LEFT HIGH BEAM BULB |
| FRONT CONTROL MODULE |
Diagnostic Test
1. INTERMITTENT CONDITIONTurn the ignition on.
With the Scan Tool, clear all FCM DTC's.
Turn the Headlamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH?
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 - VER 1.
2. LEFT HIGH BEAM BULB
Turn the ignition off.
Inspect the Left High Beam 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. (L33) HIGH BEAM CONTROL CIRCUIT
Turn the ignition off.
Disconnect the FCM C2 harness connector.
Measure the resistance of the (L33) High Beam Control circuit.
Is the resistance above 5.0 ohms?
Yes
- Repair the (L33) High Beam Control circuit for an open condition.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Front Control Module (FCM) in accordance with the service information.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)