Auto Highbeam Module (AHBM)
B210B-SYSTEM VOLTAGE HIGH
For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.
- When Monitored:
With the ignition on.
- Set Condition:
The Auto High Beam Module detects the (F921) 5-volt Supply circuit voltage above 5.0 volts.
1. CHECK FOR ACTIVE DTC
1. With the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
3. With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. (F921) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Junction Bock C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (F921) 5-volt Supply circuit.
Is the voltage above 5.5 volts?
Yes
- Repair the (F921) 5-volt Supply circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST Body Verification Test.
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Junction Block.
- Perform the BODY VERIFICATION TEST Body Verification Test.