Charging System Test
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Reference Information
Description and Operation
Charging System Description and Operation
Electrical Information Reference (Except Opel Gt)
Testing for Intermittent Conditions and Poor Connections
Circuit/system Verification
Engine ON, observe the charge indicator on the instrument panel cluster (IPC) or message in the driver information center (DIC). The charge indicator on the IPC should be turned OFF and the DIC should not display charging system message.
| ⇒ | If the charge indicator is not on the IPC or a charging system message is not displayed on the DIC, refer to Testing for Intermittent Conditions and Poor Connections . |
| ⇒ | If the charge indicator is on the IPC or a charging system message is displayed on the DIC, refer to Circuit/System Testing. |
Circuit/system Testing
- Ignition ON, verify that no generator or battery current sensor DTCs are set that would cause a charging system concern.
- Ignition OFF, measure the voltage across the battery terminals. The voltage should read 12.0 volts or greater at room temperature.
- Connect a carbon pile tester to the battery.
- Start the engine and increase the engine speed to 2,500 RPM. Observe the voltage reading on the tester. The voltage should read between 12.6 - 15.0 volts.
- Adjust the carbon pile tester to the specified load test output value, refer to Generator Usage .
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Generator Replacement