4000 - 4999: 4296

4296- BATTERY SUPPLY VOLTAGE - ERRATIC

For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Vehicle speeds above 6 km/h (3.4 mph).

- Set Condition:
Voltage is less than 8.2 volts for longer than 20 msec or greater than 16.8 volts for longer than 500 ms at vehicle speeds above 6 km/h (3.4 mph).





1. CHARGING SYSTEM DTC PRESENT

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

1. Ignition on, engine not running.
2. With the scan tool, read and record DTCs from the ECM.
3. With the scan tool, read and record Freeze Frame information.
4. With the scan tool, erase DTCs.
5. Start the engine.
6. With the scan tool, read and record DTCs.
7. With the scan tool read DTCs from the ECM.

Are any charging system codes present?

Yes

- Repair the charging system DTC in the ECM.
- Perform the ECM VERIFICATION TEST Verification Tests.

No

- Go To 2

2. CHARGING SYSTEM FAILURE
1. Start the engine.
2. Connect voltmeter to vehicle battery.

Is the vehicle battery voltage less than 8.2 volts or greater than 16.8 volts?

Yes

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

No

- Go To 3

3. CHARGING POWER SUPPLY VOLTAGE
1. With a scan tool read Power Supply and Fused Ignition Voltage.

Is Power Supply and Fused Ignition Voltage less than 8.2 volts or greater than 16.8 volts?

Yes

- Replace the Anti-Lock Brakes Module.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Perform the ABS-INTERMITTENT CONDITION diagnostic procedure Testing and Inspection.