*ENGINE CRANKS BUT WILL NOT START





For a complete wiring diagram Refer to Section 8W



Possible Causes
INTAKE SYSTEM RESTRICTION
ECM CODES PRESENT
ECT SENSOR
FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT SHORTED TO VOLTAGE
ENGINE CONTROL MODULE
ENGINE DRIVE BELT
FUEL PRESSURE SENSOR
FUEL SUPPLY CONTAMINATION
SUPPLY SIDE FUEL SYSTEM PRESSURE
FUEL SYSTEM RESTRICTION
GLOW PLUGS
SKREEM CODES PRESENT




Diagnostic Test

1. ECM CODES PRESENT

NOTE: The ECM must have proper power and ground connections for the following tests to be valid. Refer to Checking the ECM Power and Grounds in the symptom list.


Turn the ignition on.
With the scan tool, read the ECM DTCs.

Does the scan tool display any ECM DTCs?

Yes


No

2. SKREEM CODES PRESENT

With the scan tool, read the SKREEM DTCs.

Does the scan tool display any SKREEM DTCs?

Yes


No

3. CHECK FOR INTAKE SYSTEM RESTRICTIONS

Turn the ignition off.
Ensure vehicle has adequate fuel supply in fuel tank.
Inspect all air intake and turbocharger related hoses/tubes and connections.
Inspect the air filter for excessive dirt, soiling or other problems that may cause restricted air flow.

Were any problems found?

Yes


No

4. ECT SENSOR

Using a temperature probe, check the vehicle temperature near the ECT Sensor.
Turn the ignition on.
With the scan tool in Sensors, read the ECT Sensor temperature.
Compare the temperature probe reading with the scan tool reading.

Are the two readings within 10 degrees C of each other?

Yes


No

5. GLOW PLUGS

NOTE: Prior to performing this test, be sure to check the Glow Plug operation. Refer to CHECKING GLOW PLUG OPERATION for the related symptom(s).


Refer to the Service Information and check the Glow Plugs for proper operation.

Are the Glow Plugs operating properly?

Yes


No

6. FUEL SYSTEM RESTRICTION

Inspect the fuel system lines for restrictions, leaks or other problems.

NOTE: Refer to the Service Information to ensure that the fuel system is properly primed. A non-primed system or excessive air in the supply system will cause a no-start condition.



Is there any evidence of problems?

Yes


No

7. FUEL CONTAMINATION

Inspect the fuel supply for contamination.

Is the fuel contaminated?

Yes


No

8. SUPPLY SIDE FUEL SYSTEM PRESSURE

Refer to and perform the Checking the Low Pressure Fuel Delivery System Test in this section.

Is the fuel pressure within specification?

Yes


No

9. FUEL PRESSURE SENSOR

Turn the ignition on, engine off.
With the scan tool, read the Fuel Pressure Sensor volts.

Is the Fuel Pressure Sensor voltage 0.45 and 0.60 volt?

Yes


No

10. CHECK FUEL PRESSURE AT ENGINE CRANKING

With the scan tool, read the Fuel Pressure Sensor signal while cranking the engine.

Does the Fuel Pressure Sensor signal increase to above 4300 psi (300 bar) within a few seconds after engine cranking begins?

Yes


No

11. FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT(S) SHORTED TO VOLTAGE

Turn the ignition off.
Disconnect the each Fuel Injector harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the TIPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector.
Turn the ignition on.
Measure the voltage of each Fuel Injector Low-Side Control circuit in the Fuel Injector harness connectors.

Is there any voltage present?

Yes


No

12. ENGINE DRIVE BELT

Refer to the Service Information to ensure the Engine Drive Belt is installed correctly and the camshaft and crankshaft gears are timed correctly.

Were any problems found?

Yes


No

13. FUEL PRESSURE SOLENOID

Turn the ignition off.
Refer to the Service Information and replace the Fuel Pressure Solenoid.
Turn the ignition on.
With the scan tool, erase the ECM DTC's.
Attempt to start the vehicle.

Does the vehicle start and run?

Yes


No