Testing For A No Crank Condition On A Vehicle With An Ignition Crank Sense Circuit (Conventional Starting With A Start Button/Skim Key)

Verify that there are no security module or key fob/skim key faults present.
1. Security module or key faults are present - perform the diagnostics before continuing.
2. Security module or key faults are not present - continue to step 2 .
Attempt to crank the engine with the engine starter. Use the scan tool and check the PCM for the P141D-Starter Relay Feedback Open Circuit Performance fault present.
1. If the fault is present along with a no crank condition, continue to step 6 .
2. If the fault is NOT present along with a no crank condition, continue to step 3 .
Using a load test tool or test light, back probe the starter relay output circuit at the PDC and attempt to crank the engine. There should be voltage on the starter relay output circuit when the engine cranking is initiated. The load test tool bulb should be bright if voltage is present. For additional information on load testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .
1. If there is no voltage present and voltage is present on the ignition sense circuit, the PDC is likely internally open.
2. If voltage is present at the PDC connector, continue to step 4 .
Disconnect the connector at the starter solenoid and connect the load test tool to the starter solenoid connector while attempting to crank the engine. The load test tool bulb should be bright if voltage is present.
1. If voltage is present at the starter solenoid connector, continue to step 5 .
2. If there is no voltage present repair the starter relay output circuit for an open or high resistance between the PDC and starter solenoid.
Verify voltage is present on the main battery cable end connected to the starter.
1. If voltage is present, verify the engine spins freely. Inspect all starter terminals for poor connections before replacing the starter motor.
2. If there is no voltage present on the main battery cable at the starter motor, check and repair the main battery cable or connections.
Using the wiring information as a guide, check the fuse in the PDC that supplies the voltage for the starter relays.
NOTE:
Do not check the fuse for the ignition crank sense circuit. If the ignition crank sense circuit fuse is open, the fault will set but the engine should still crank.
1. If the fuse is good, continue to step 7 .
2. If the fuse is open, isolate the starter relay output circuit and check the circuit for a short to ground. If the circuit is not shorted, the starter solenoid is likely faulty (internally shorted across the winding).
If the starter relays are removable, remove both starter relays from the PDC. Load test the battery supply to terminal 30 of the BCM controlled starter relay. The load test tool bulb should be bright if voltage is present.
1. If there is no voltage present at terminal 30 and the fuse is good, verify that the main battery connection to the PDC is good. If the main battery supply to the PDC is good, replace the Power Distribution Center.
2. If voltage is present at terminal 30, continue to step 8 .
Check the starter relays for proper operation. Verify that the relays are closing when engine cranking is initiated.
1. If the starter relays are closing properly, voltage is present to the BCM controlled starter relay and voltage is present on the starter relay output circuit at the PDC connector, replace the Power Distribution Center.
2. If a starter relay is not closing properly, use the wiring information to verify the control circuit is present before replacing the relay.