Diagnosis And Testing - Starting System: Notes
The battery, starting, and charging systems operate with one another, and must be tested as a complete system. In order for the vehicle to start and charge properly, all of the components involved in these systems must perform within specifications.
It is important that you keep the interdependency of Battery System, Starting System and Charging system in mind when attempting to diagnose any of these systems.
The diagnostic procedures used in this information includes most conventional diagnostic methods. The use of an induction-type milliampere ammeter, volt/ohmmeter, battery charger, carbon pile rheostat (load tester), and 12-volt test lamp may be required.
| CONDITION | POSSIBLE CAUSE | CORRECTION |
|---|---|---|
| STARTER FAILS TO OPERATE. |
1. Battery discharged or faulty. |
1. Refer to BATTERY SYSTEM . Charge or replace the battery, if required. |
| - |
2. Starting circuit wiring faulty. |
2. Refer to SYSTEM WIRING DIAGRAMS . Test and repair the starter feed and/or control circuits, if required. |
| - |
3. Ignition switch faulty. |
3. Refer to COLUMN . Replace the ignition switch, if required. |
| - |
4. Park/Neutral position switch faulty or misadjusted. |
4. Refer to AUTOMATIC - NAG1 SERVICE INFORMATION . Replace the park/neutral position switch, if required. |
| - |
5. Starter solenoid faulty. |
5. Refer toDIAGNOSIS AND TESTING - STARTER MOTOR . Replace the starter motor assembly, if required. |
| - |
6. Starter motor faulty. |
6. If all other starting system components and circuits test OK, replace the starter motor assembly. |
| STARTER ENGAGES, FAILS TO TURN ENGINE. |
1. Battery discharged or faulty. |
1. Refer to BATTERY SYSTEM . Charge or replace the battery, if required. |
| - |
2. Starting circuit wiring faulty. |
2. Refer to SYSTEM WIRING DIAGRAMS . Test and repair the starter feed and/or control circuits, if required. |
| - |
3. Starter motor faulty. |
3. If all other starting system components and circuits test OK, replace the starter motor assembly. |
| - |
4. Engine seized. |
4. Refer to ENGINE - ELECTRICAL DIAGNOSTICS - CROSSFIRE . |
| STARTER ENGAGES, SPINS OUT BEFORE ENGINE STARTS. |
1. Starter ring gear faulty. |
1. Refer to REMOVAL and INSTALLATION . Remove the starter motor to inspect the starter ring gear. Replace the starter ring gear, if required. |
| - |
2. Starter motor faulty. |
2. If all other starting system components and circuits test OK, replace the starter motor assembly. |
| STARTER DOES NOT DISENGAGE. |
1. Starter motor improperly installed. |
1. Refer to REMOVAL and INSTALLATION . Tighten the starter mounting hardware to the correct tightness specifications. |
| - |
2. Ignition switch faulty. |
2. Refer to COLUMN . Replace the ignition switch, if required. |
| - |
3. Starter motor faulty. |
3. If all other starting system components and circuits test OK, replace the starter motor assembly. |