B1633-LEFT HI BEAM CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
- With the Headlamps activated.
- Set Condition:
- When the FCM detects a LOW condition.
| Possible Causes |
| (L33) LEFT HIGHBEAM OUTPUT CIRCUIT |
| FRONT CONTROL MODULE |
Diagnostic Test
1. INTERMITTENT CONDITIONTurn the ignition on.
With the Scan Tool, clear all FCM DTC's.
Turn the Highbeam Headlamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1633-LEFT HI BEAM 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 - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. (L33) LEFT HIGHBEAM OUTPUT CIRCUIT
Turn the ignition off.
Disconnect the FCM C2 harness connector.
Disconnect the Left Headlamp harness connector.
Measure the resistance between ground and the Left Highbeam Output circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (L33) Left Highbeam Output circuit for a short to ground 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)