Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2009COMMANDER LIMITED, 5.7 T, RWDREPAIR AND DIAGNOSISELECTRICALSTARTERSTARTING SYSTEM (SERVICE INFORMATION)DIAGNOSIS AND TESTINGSTARTING SYSTEMNOTES
2009 Jeep Commander Limited, 5.7 T, RWD
Starting System: Notes
2009 Jeep Commander Limited, 5.7 T, RWDSECTION Notes
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 three systems must perform within specifications.
STARTING SYSTEM DIAGNOSIS
| CONDITION | POSSIBLE CAUSE | CORRECTION |
|---|---|---|
| STARTER FAILS TO OPERATE | 1. Battery discharged or inoperative | 1. Charge and test battery. Refer to Electrical/Battery System - Diagnosis and Testing . Replace battery, if required. |
| 2. Starter motor or solenoid inoperative | 2. Test the starter motor and solenoid. See Diagnosis and Testing . Replace starter motor, if required. | |
| 3. Starter relay inoperative | 3. See SYSTEM WIRING DIAGRAMS . Test and replace the starter relay, if required | |
| 4. Clutch pedal position switch inoperative (if equipped with manual transmission) | 4. See Clutch Pedal Position Switch. Test and adjust or replace switch, if required. | |
| 5. Park/Neutral position switch inoperative (if equipped with automatic transmission) | 5. See Park/Neutral Position Switch. Test and adjust or replace switch, if required. | |
| 6. Ignition switch inoperative | 6. Test the Ignition Switch and Key Lock Cylinder. Replace ignition switch if required. | |
| 7. Starting circuit wiring inoperative | 7. See SYSTEM WIRING DIAGRAMS . Test and repair starter feed and/or control circuits, if required. | |
| STARTER ENGAGES, BUT FAILS TO TURN ENGINE | 1. Battery discharged or inoperative | 1. Charge and test battery. Refer to Electrical/Battery System - Diagnosis and Testing . Replace battery if required. |
| 2. Starter motor or solenoid inoperative | 2. Test the starter motor and solenoid. See Diagnosis and Testing . Replace starter motor if required. | |
| 3. Starting circuit wiring inoperative | 3. See SYSTEM WIRING DIAGRAMS . Test and repair starter feed and/or control circuits, if required. | |
| 4. Engine seized | 4. - See Engine Diagnosis in appropriate Engine service information article. Test and repair engine as required. | |
| STARTER ENGAGES, BUT THEN DISENGAGES BEFORE ENGINE STARTS | 1. Starter motor or solenoid inoperative | 1. Test the starter motor and solenoid. See Diagnosis and Testing . Replace starter motor, if required. |
| 2. Starter ring gear damaged | 2. Remove starter motor and inspect starter ring gear. See Removal . Replace starter ring gear, if required. | |
| STARTER DOES NOT DISENGAGE | 1. Starter motor incorrectly installed or solenoid inoperative | 1. Inspect and test the starter motor and solenoid. See Diagnosis and Testing . Replace starter motor, if required. |
| 2. Starter relay inoperative | 2. See SYSTEM WIRING DIAGRAMS . Test and replace the starter relay, if required. | |
| 3. Ignition switch inoperative | 3. Test the Ignition Switch and Key Lock Cylinder. Replace ignition switch, if required. |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.