Diagnosis And Testing - Starting System: Notes
WARNING: This page is about a different car, the 2006 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The battery, starting and charging systems operate in conjunction with one another and must be tested as a complete system. For correct starting/charging system operation, all of the components involved in these 3 systems must perform within specifications.
| Starting System Diagnosis | ||
|---|---|---|
| CONDITION | POSSIBLE CAUSE | CORRECTION |
| STARTER FAILS TO OPERATE. | 1. Battery discharged or faulty. | 1. Refer to BATTERY SYSTEM . Charge or replace battery, if required. |
| 2. Starting circuit wiring faulty. | 2. Refer to SYSTEM WIRING DIAGRAMS . Test and repair starter feed and/or control circuits, if required. | |
| 3. Starter relay faulty. | 3. Refer to Starter Relay in Diagnosis and Testing. Replace starter relay if required. | |
| 4. Ignition switch faulty. | 4. Refer to Ignition Switch and Key Lock Cylinder. Replace ignition switch if required. | |
| 5. Park/Neutral position switch faulty or misadjusted. | 5. Refer to appropriate Park/Neutral Position Switch information. Replace park/neutral position switch if required. | |
| 6. Starter motor faulty. | 6. If all other starting system components and circuits test OK, replace starter motor. | |
| STARTER ENGAGES, FAILS TO TURN ENGINE. | 1. Battery discharged or faulty. | 1. Refer to BATTERY SYSTEM . Charge or replace battery if required. |
| 2. Starting circuit wiring faulty. | 2. Refer to SYSTEM WIRING DIAGRAMS . Test and repair starter feed and/or control circuits if required. | |
| 3. Starter motor faulty. | 3. If all other starting system components and circuits test OK, replace starter motor assembly. | |
| 4. Engine seized. | 4. Refer to appropriate Engine SERVICE INFORMATION article. | |
| STARTER ENGAGES, SPINS OUT BEFORE ENGINE STARTS. | 1. Starter ring gear faulty. | 1. Refer to STARTER Removal and Installation. Remove starter motor to inspect starter ring gear. Replace starter ring gear if required. |
| 2. Starter motor faulty. | 2. If all other starting system components and circuits test OK, replace starter motor assembly. | |
| STARTER DOES NOT DISENGAGE. | 1. Starter motor improperly installed. | 1. Refer to STARTER Removal and Installation. Tighten starter mounting hardware to correct torque specifications. |
| 2. Starter relay faulty. | 2. Refer to Starter Relay Diagnosis and Testing. Replace starter relay if required. | |
| 3. Ignition switch faulty. | 3. Refer to Ignition Switch and Key Lock Cylinder. Replace ignition switch if required. | |
| 4. Starter motor faulty. | 4. If all other starting system components and circuits test OK, replace starter motor. | |