Diagnostic Test

1. Turn the engine over by hand to make sure the engine is not seized.

   Is the engine able to turn over?

   Yes 

   • Go to step  2

   No 

   • Repair the mechanical condition preventing the starter motor from cranking.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

1. Turn the ignition off.
2. Check the Battery Cables for excessive resistance using the service information procedure.

   Did either Battery Cable have a voltage drop greater than 0.2 of a volt?

   Yes 

   • Repair the excessive resistance in the Battery circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

   No 

   • Go to step  3

1. Turn ignition off.
2. Remove the Starter Relay from IPM.
   CAUTION: The Parking Brake must be on and the Transmission must be in park for a vehicle equipped with an automatic transmission.
   WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
3. Briefly connect a jumper wire between Fused B+ circuit and the (T750) Starter Relay Output circuit.

   Did the Starter Motor crank the engine?

   Yes 

   • Go to step  4

   No 

   • Go to step  6

1. Ignition on, engine not running.
2. Using a 12-volt test light, probe the (F961) Fused Ignition Switch Output circuit in the Starter Relay connector.
3. While observing 12-volt test light, hold ignition key in the start position.

   Does the test light illuminate brightly?

   Yes 

   • Go to step  5

   No 

   • Repair the excessive resistance in the (F961) Fused Ignition Switch Output circuit. Inspect related fuses and repair as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

1. Turn the ignition off.
2. Disconnect the PCM harness connectors.
3. Measure the resistance in the (T752) Starter Relay Control circuit from the Relay terminal to the appropriate terminals of special tool #8815.

   Is the resistance below 5.0 ohms?

   Yes 

   • Replace the Starter Motor Relay.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

   No 

   • Repair the open in the (T752) Starter Relay Control circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

1. Turn the ignition off.
2. Using a 12-volt test light connected to ground, probe the Fused B+ circuit at the Starter Relay terminal.

   Does the test light illuminate brightly?

   Yes 

   • Go to step  7

   No 

   • Repair the excessive resistance in the Fused B+ circuit. Inspect related fuses and repair as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

1. Disconnect the Starter Relay Output connector from the Starter Solenoid.
2. Measure the resistance of the (T750) Starter Relay Output circuit between the Relay and the Solenoid harness connector.

   Is the resistance below 5.0 ohms?

   Yes 

   • Go to step  8

   No 

   • Repair the open in the (T750) Starter Relay Output circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

If there are no other possible causes remaining, review repair.

Repair 

• Replace the Starter.
• Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure