Engine Cranks But Does Not Run

ENGINE CRANKS BUT DOES NOT RUN

DESCRIPTION
The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis.

The Engine Cranks but Does Not Run diagnostic table assumes the following:
- The battery is completely charged. Refer to Battery Inspection/Test in Starting and Charging. Battery Inspection/Test
- The engine cranking speed is within specifications. Refer to Engine Cranks Slowly in Starting and Charging. Engine Cranks Slowly
- There is adequate fuel in the fuel tank.

DIAGNOSTIC AIDS
- Refer to Symptoms - Computers and Control Systems and Hard Start for further diagnosis. Symptom Related Diagnostic Procedures Hard Start
- The crankshaft position {CKP) sensor will not cause a no start condition. If there is a condition with the CKP sensor, the ECM uses the camshaft position (CMP) sensor signals to determine engine speed and position. If there is a condition A hard start symptom will occur.

TEST DESCRIPTION

Steps 1-4:

Steps 5-8:

The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if there is a DTC causing the no start condition.
4. This step determines if the fuel pump is turning on. An audible sound can be heard at the fuel injector rail when the fuel pump is turned ON.