Auto Headlamp Leveling Module (AHLM)

B210D-BATTERY VOLTAGE LOW






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

- When Monitored:
At all times.

- Set Condition:
The module senses voltage input below 9.0 volts for over 15 seconds.





1. CHECK FOR ANY POWERTRAIN CONTROL MODULES DTCS

NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.

NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.

NOTE: Make sure the generator drive belt is in good operating condition.

NOTE: Inspect the fuses in the IPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.

1. Turn the ignition on.
2. With the scan tool, read active PCM DTCs.

Does the scan tool display any active PCM DTCs?

Yes

- For gas engine applications, Testing and Inspection Perform the appropriate diagnostic procedure.
- For diesel engine applications, Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 2

2. TEST FOR INTERMITTENT CONDITION
1. With the scan tool, erase all DTCs.
2. Start the engine and run for two minutes.
3. With the scan tool, read DTCs.

Does the scan tool display active: B210D-BATTERY VOLTAGE LOW?

Yes

- Replace the Headlamp Leveling Module (AHLM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.