Control Circuit Testing

2008 Jeep Commander Limited, 4.7 N, RWDSECTION Control Circuit Testing

The starter control circuit components should be tested in the order in which they are listed, as follows:

  1. Starter Relay  - Refer to STARTER RELAY . The starter relay is located within the TIPM (Totally Integrated Power Module). Refer to "*NO CRANK CONDITION .
  2. Starter Solenoid  - Refer to STARTER MOTOR  in the Diagnosis and Testing.
  3. Ignition Switch  - Refer to SWITCH-IGNITION and CYLINDER - IGNITION KEY AND LOCK . Replace ignition switch if required.
  4. Clutch Pedal Position Switch  - If equipped with manual transmission.
  5. Park/Neutral Position Switch  - If equipped with automatic transmission, refer to Park/Neutral position switch (Transmission Range Sensor). Refer to appropriate Transmission SERVICE INFORMATION article.
  6. Wire harnesses and connections  - Refer to the SYSTEM WIRING DIAGRAMS article .
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.