Symptom Chart

Symptom	Possible Causes	Action
The engine does not crank (starter motor does not turn)	Gear selector not in P or N position (vehicles with automatic transmission) Battery Starter relay Invalid key code received by Central Junction Box (CJB) Harness/Connectors Starter motor Ignition switch Generator Transmission Control Module (TCM) Engine Control Module (ECM) Engine seized	Make sure the gear selector is in the P or N position and correctly adjusted. Check the battery condition and state of charge. Check for DTCs indicating an immobilizer fault. Check the starter motor relay, ignition switch and generator circuits. Refer to the electrical guides. Check for TCM and ECM DTCs. Check that the engine turns freely.
The engine does not crank (starter motor does turn)	Starter motor installation Starter motor Flywheel/Drive plate ring gear	Check the starter motor installation (fasteners tight, starter motor square to engine, etc). Check the flywheel/drive plate ring gear teeth for damage, foreign objects, etc.
Engine cranks too slowly	Battery Harness/Connectors Starter motor Oil grade	Check the battery condition and state of charge. Check the starter motor circuits. Refer to the electrical guides. Check the engine oil grade and condition.
Engine cranks too fast	Low engine compression	Check the engine compressions.
Excessive starter motor noise	Starter motor Flywheel/Drive plate ring gear Starter motor installation/casing	Check the starter motor installation (fasteners tight, motor square to engine, etc). Check the starter motor casing condition. Check the flywheel/drive plate ring gear teeth for damage, foreign objects, etc.