For a complete wiring diagram Refer to Section 8WPossible CausesBATTERY CABLE HIGH RESISTANCEBATTERY CABLESECMMECHANICAL PROBLEMOPEN FUSED BATTERY (+) CIRCUITSTARTER COIL DRIVER (INTERNAL TIPM)SKREEM CODES PRESENTSTARTER MOTORSTARTER RELAY(T752) STARTER RELAY CONTROL CIRCUIT OPEN(T752) STARTER RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE(T750) STARTER RELAY OUTPUT CIRCUIT OPEN1. BATTERY CABLESThe battery must be fully charged before diagnosing a no crank condition.Turn the ignition off.Inspect the battery cables for corrosion, looseness or other problems.Is there evidence of problems?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 22. BATTERY CABLE HIGH RESISTANCEUsing the Service Information, check the battery cables for high resistance.Did either battery cable have a voltage drop greater than 0.2 volts?YesReplace the battery cable(s).Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To33. SKREEM CODES PRESENTTurn the ignition on.With the scan tool, read the SKREEM DTCs.Does the scan tool display any SKREEM DTCs?YesRefer to symptom list for problems related to SKREEM.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 44. TIPM CAN BUS CODES PRESENTWith the scan tool, read the TIPM DTCs.If there are CAN BUS related problems the TIPM will not supply power to the Starter Relay coil.Does the scan tool display any CAN Bus related DTCs in the TIPM?YesRefer to symptom list for problems related to CAN Bus communication.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 55. CHECKING STARTER OPERATION

Turn the ignition off.Remove the Starter Relay from the TIPM.THE TRANSMISSION MUST BE IN NEUTRAL AND THE PARK BRAKE MUST BE SET FOR THIS TEST.THE ENGINE MAY CRANK IN THE NEXT STEP. WHEN THE ENGINE IS CRANKING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.Momentarily jumper Starter Relay connector cavities 30 and 87 in the TIPM connector.Did the engine crank?YesGo To 6NoGo To 11 6. STARTER RELAYInstall a known good relay in place of the Starter Relay.Attempt to start the engine.Does the engine crank?YesReplace the Starter Relay.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 77. CHECK POWER AND GROUNDSRefer to the symptom list and perform the Checking the ECM Power and Ground test.Were any problem found with the ECM powers and grounds?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 88. STARTER COIL DRIVE CIRCUIT (INTERNAL TIPM)

Turn the ignition off.Remove the Starter Relay from the TIPM.Using a 12-volt test light connected to ground, check the Starter Coil Driver circuit in the Starter Relay connector while turning the ignition switch to the START position.Does the test light illuminate with the ignition switch in the START position?YesGo To 9NoCheck the TIPM ignition supply circuits and fuses. If TIPM fuses and ignition supply circuits are ok, replace the TIPM.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)9. (T752) STARTER RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE

Turn the ignition off.Disconnect the ECM harness connectors.Remove the ASD Relay from the TIPM.Using a jumper wire, connect ASD Relay connector cavities 30 and 87 in the TIPM.Turn the ignition on.Measure the voltage of the (T752) Starter Relay Control circuit.Is the voltage above 1.0 volt?YesRepair the (T752) Starter Relay Control circuit for a short to voltage.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 1010. (T752) STARTER RELAY CONTROL CIRCUIT OPEN

Turn the ignition off.Remove the jumper wire and install the ASD Relay.Measure the resistance of the (T752) Starter Relay Control circuit between the ECM harness connector and the Starter Relay connector in the TIPM.Is the resistance below 10.0 ohms?YesReplace the Engine Control Module in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoRepair the (T752) Starter Relay Control circuit for an open.11. FUSED B(+) CIRCUIT OPEN

Using a 12-volt test light connected to ground, check the Fused B(+)circuit in the Starter Relay connector in the TIPM.Is the test light on?YesGo To 12NoRepair the Fused B(+) circuit for an open.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)12. (T750) STARTER RELAY OUTPUT CIRCUIT OPEN

Disconnect the (T750) Starter Relay Output wire from the Starter Solenoid.Connect the (T750) Starter Relay Output wire (at the Starter) to ground.Using a 12-volt test light connected to 12-volts, check the (T750) Starter Relay Output circuit at the Starter Relay connector in the TIPM.Does the test light illuminate brightly?YesGo To 13NoRepair the (T750) Starter Relay Output circuit for an open.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)13. MECHANICAL PROBLEMTurn the ignition off.Attempt to manually rotate the crankshaft 360°.Is the crankshaft able to rotate 360°?YesReplace the Starter Motor.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoRepair the engine mechanical problem.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)