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No Crank Condition: Testing

    WARNING: Make sure the battery is disconnected, then wait 2 minutes before proceeding.
  1. Turn the engine over by hand to ensure the engine is not seized. If engine turns over, go to next step. If no, repair the mechanical condition preventing the starter motor from cranking. See POWERTRAIN VERIFICATION TEST VER-1  .
  2. Turn the ignition off. Disconnect the PCM harness connectors. Move the Gear selector through all gear positions, from Park to 1st and back. While moving the gear selector through each gear, measure the resistance between ground and the Position Switch Sense circuit. Did the resistance change from above 10.0 ohms to below 10.0 ohms? If yes, go to next step. If no, replace the Transmission Range Sensor. See OVERHAUL - 45RFE & 545RFE in AUTOMATIC TRANSMISSION. See POWERTRAIN VERIFICATION TEST VER-1  .
  3. Turn the ignition off. Check the Battery Cables for high resistance. See FEED CIRCUIT TEST  under ON-VEHICLE TESTING. Did either Battery Cable have a voltage drop greater than 0.2 ohms? If yes, repair the Battery circuit for high resistance. See POWERTRAIN VERIFICATION TEST VER-1  . If no, go to next step.
    4. WARNING: The Parking Brake must be on and the Transmission must be in Park for a vehicle equipped with an automatic transmission. The engine may be cranked in the next step. Keep away from moving engine parts.
  4. Turn the ignition off. Remove the Starter Relay from PDC. Briefly connect a jumper wire between Starter Relay B+ circuit and the Starter Relay Output Circuits. Did the Starter Motor crank the engine? If yes, go to next step. If no, go to Step  7 .
  5. Turn ignition on, engine not running. Using a 12-volt test light, probe the Ignition Switch Output circuit in the Starter Relay connector. While observing 12-volt test light, hold ignition key in the START position. Does the test light illuminate brightly? If yes, go to next step. If no, repair the Ignition Switch Output circuit for an open or high resistance. See POWERTRAIN VERIFICATION TEST VER-1  .
  6. Turn the ignition off. Disconnect the PCM harness connector. Measure the Starter Relay Control circuit between the Relay terminal and the PCM harness connector. Is the resistance below 5.0 ohms? If yes, replace the Starter Motor Relay. Refer to POWERTRAIN VERIFICATION TEST VER-1  . If no, repair the Starter Relay Control circuit for an open. See POWERTRAIN VERIFICATION TEST VER-1  .
  7. Disconnect the Starter Relay Output connector from the Starter Solenoid. Measure the resistance of the Starter Relay Output circuit between the Relay and the Solenoid harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair Starter Relay Output circuit for an open. See POWERTRAIN VERIFICATION TEST VER-1  .
  8. Using a 12-volt test light connected to ground, probe the fused B+ circuit at the Starter Relay terminal. Does the test illuminate brightly? If yes, go to next step. If no, repair the fused B+ Circuit for an open or high resistance. See POWERTRAIN VERIFICATION TEST VER-1  .
  9. If there are no other possible causes remaining, replace the Starter. See POWERTRAIN VERIFICATION TEST VER-1  .
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