C2100

C2100 - BATTERY VOLTAGE LOW





For a complete wiring diagram, refer to Electrical Diagrams

- When Monitored:

With the ignition on.

- Set Condition:

If the Anti-Lock Brakes Module detects system voltage is below 7.5 volts.





1. DTCS IN THE PCM

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

Using the scan tool, read and record DTCs from the PCM.

Using the scan tool, read and record Freeze Frame information.

Using the scan tool, erase DTCs.

Start the engine.

Using the scan tool, read and record DTCs.

With the scan tool read DTCs from the PCM.

Are any charging system codes present?

Yes

- Repair the charging system DTC in the PCM.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 2

2. CHARGING SYSTEM FAILURE

Start the engine.

Connect voltmeter to vehicle battery.

Is the vehicle battery voltage under 8.2 volts?

No

- Go To 3

Yes

- Repair the charging system.
- Perform ABS VERIFICATION TEST. ABS Verification Test

3. CHARGING POWER SUPPLY VOLTAGE

Using the scan tool read Power Supply Voltage.

Is Power Supply Voltage under 8.2 volts?

No

- Perform the ABS INTERMITTENT CONDITION diagnostic procedure. Component Tests and General Diagnostics

Yes

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test