Auto High Beam Module (AHBM)

B210B-SYSTEM VOLTAGE HIGH



- When Monitored:
With the ignition on.

- Set Condition:
The Auto High Beam Module detects the (F921) Fused Run Relay Output circuit voltage is shorted high.





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) FUSED RUN RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Remove Fuse 10, 10 Amp, from the Junction Block.
3. Turn the ignition on.
4. Measure the voltage of the (F921) Fused Run Relay Output circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (F921) Fused Run Relay Output circuit.
- 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.