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.
Starting System Test: 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 faulty | Charge or replace battery, if required. Refer to BATTERY . |
| 2. Starting circuit wiring faulty | 2. Refer to appropriate Wiring Diagram. Test and repair starter feed and/or control circuits, if required. | |
| 3. Starter relay faulty | 3. The starter relay is located within the totally integrated power module. Refer to NO CRANK CONDITION . | |
| 4. Ignition switch faulty | 4. Replace ignition switch if required. Refer to REMOVAL AND INSTALLATION . | |
| 6. Park/Neutral position switch faulty or misadjusted | 6. Replace park/neutral position switch if required. | |
| 7. Starter solenoid faulty | 7. Replace starter motor assembly if required. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . | |
| 8. Starter motor faulty. | 8. If all other starting system components and circuits test OK, replace starter motor. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . | |
| Starter engages, fails to turn engine. | 1. Battery discharged or faulty. | 1. Charge or replace battery if required. Refer to BATTERY . |
| 2. Starting circuit wiring faulty. | 2. Refer to appropriate Wiring Diagram. 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 the starter motor assembly. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . | |
| 4. Engine seized. | 4. Refer to ENGINE MECHANICAL, FUEL INJECTION AND IGNITION . | |
| Starter engages, spins out before engine starts. | 1. Starter ring gear faulty. | 1. Remove starter motor to inspect starter ring gear. Replace starter ring gear if required. Refer to FLEXPLATE . |
| 2. Starter motor faulty. | 2. If all other starting system components and circuits test OK, replace starter motor assembly. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . | |
| Starter does not disengage. | 1. Starter motor improperly installed. | 1. Tighten starter mounting hardware to correct torque specifications. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . |
| 2. Starter relay faulty. | 2. The starter relay is located within the totally integrated power module. Refer to NO CRANK CONDITION | |
| 3. Ignition switch faulty. | 3. Replace ignition switch if required. Refer to REMOVAL AND INSTALLATION . | |
| 4. Starter motor faulty. | 4. If all other starting system components and circuits test OK, replace starter motor. Refer to STARTER (CGUA ENGINE) , STARTER (CGVA ENGINE) or STARTER (CJRA ENGINE) . | |
Testing
Cold Cranking Test
For complete starter wiring circuit diagrams, refer to appropriate Wiring Diagram. The battery must be fully-charged and load-tested before proceeding. Refer to BATTERY CHARGING .
-- Connect volt-ampere tester to battery terminals. See instructions provided by manufacturer of volt-ampere tester being used.
-- Fully engage parking brake.
-- Place gearshift selector lever in Park position.
-- Verify that all lamps and accessories are turned off.
-- To prevent the engine from starting, remove either the ignition run fuse, or the fuel pump control fuse.
Attempt to start engine a few times before proceeding with following step.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.