Diagnostic Test

1) ACTIVE DTC
Ignition on, engine not running.

With a scan tool, read DTCs.

Is the DTC active at this time?

Yes
1. Go to 2).
No
1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Refer to INTERMITTENT CONDITION .
2. Perform POWERTRAIN VERIFICATION TEST .
2) (T40) STARTER FEED CIRCUIT OPEN
Turn the ignition.

Disconnect the Starter Relay.

Disconnect the C10 TIPM harness connector.

Measure the resistance of the (T40) Starter Relay Output circuit between the C10 TIPM harness connector and the Starter Relay harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Go to 3).
No
1. Repair the open in the (T40) Starter Relay Output circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
3) (T750) STARTER RELAY OUTPUT CIRCUIT OPEN
Disconnect the Starter Solenoid connector.

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

Is the resistance below 5.0 ohms?

Yes
1. Go to 4).
No
1. Repair the open in the (T750) Starter Relay Output circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
4) TIPM OPERATION
Reconnect the C10 TIPM harness connector.

Using a 12-volt test light connected ground, probe the (T40) Stater Relay Output circuit in the Starter Relay harness connector.

Crank the engine.

Does the test light illuminate?

Yes
1. Go to 5).
No
1. Replace the TIPM is accordance with the Service information
2. Perform POWERTRAIN VERIFICATION TEST .
5) STARTER RELAY
Turn the ignition off.

Install the Starter Relay.

NOTE: The Stater Solenoid harness connector must still be disconnected at this time.

Crank the engine.

Using a 12-volt test light connected ground, probe the (T750) Stater Relay Output circuit in the Starter Solenoid harness connector.

Does the test light illuminate?

Yes
1. Replace the Starter.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace the Starter Relay.
2. Perform POWERTRAIN VERIFICATION TEST .