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.
- The engine cranking RPM is determined to be acceptable when compared to a known good vehicle.
- There is adequate fuel in the fuel tank.

DIAGNOSTIC AIDS
Test and/or inspect for the following conditions:
- Proper idle air control (IAC) operation.
- Intermittent conditions-Refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-5:

Steps 6-8:

Steps 9-11:

The number below refers to the step number on the diagnostic table.
4. While cranking the engine, the crankshaft position (CKP) sensor active counter should increment to 255, and roll over to 0.