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. Battery Inspection/Test
* The engine cranking speed is within specifications. Refer to Engine Cranks Slowly. Engine Cranks Slowly
* There is adequate fuel in the fuel tank.

Diagnostic Aids

* The engine control module (ECM) uses the camshaft position (CMP) sensors to determine engine speed and position when there is a crankshaft position (CKP) sensor condition.
* The engine will operate with a CKP sensor condition only if the ECM has stored the learned reference position of the camshafts in memory. With a CKP sensor condition in the signal circuit, the engine will go into a limp home mode after a hard restart. The ECM then calculates engine speed from one of the CMP sensors. During a limp home mode, the following additional DTCs may set and should be ignored:

- DTC P0324 Knock Sensor (KS) Module Performance
- DTC P1011 Intake Camshaft Position Actuator Park Position Bank 1

* Refer to Symptoms - Computers and Control Systems and Hard Start for further diagnosis. - Symptoms - Engine Controls Hard Start

Test Description

Step 1 - Step 6:

Step 7 - Step 9:

The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if there is a condition with the main relay causing the no start condition. Use the Capture Info function to store any DTC information that may have set previously, before clearing the DTC information.
3. This step determines if there is an internal ECM condition, or sub-system component DTC causing the no start.
5. 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.