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Circuit/System Verification

Automatic Transmission

  1. Ignition ON, verify that no ignition, starter relay, brake pedal position sensor, theft deterrent, or automatic transmission DTCs are set that may cause the K20 Engine Control Module to disable engine starting.
  2. Ignition ON, observe the scan tool BCM 5 V Ignition Switch parameter. Place the ignition switch in the crank position, the parameter should display Crank Request.
  3. Transmission range selector in park, TCM (Transmission Control Module) Internal Mode Switch parameter displays Park.
  4. Transmission range selector in park or neutral attempt to start the vehicle. The crank relay should click and the engine should begin cranking.
    • If the starter relay does not click or the engine does not crank, refer to Circuit/System Testing.

Manual Transmission

  1. Ignition ON, verify that no ignition, starter relay, clutch pedal position sensor, brake pedal position sensor, or theft deterrent DTCs are set that may cause the K20 Engine Control Module to disable engine starting.
  2. Ignition ON, observe the scan tool BCM 5 V Ignition Switch parameter. Place the ignition switch in the crank position, the parameter should display Crank Request.
  3. Ignition ON, observe the scan tool ECM clutch pedal parameter, verify the scan tool parameter displays Applied/Released while depressing and releasing the clutch pedal.
  4. Clutch pedal fully depressed, attempt to start the vehicle. The crank relay should click and the engine should begin cranking.
    • If the starter relay does not click or the engine does not crank, refer to Circuit/System Testing.
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