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 Engine Electrical. |
• | The engine cranking speed is acceptable. Refer to Engine Cranks Slowly in Engine Electrical. |
• | There is adequate fuel in the fuel tank. |
The numbers below refer to the step numbers on the diagnostic table.
This step determines if the ignition relay is providing the listed fuses with voltage.
This step determines if the fuel pump is operating electrically.
If all the Cylinder Injector Circuit Status parameters display Fault, this indicates a condition with the injector supply voltage circuit.
Step | Action | Values | Yes | No | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Engine Controls? | -- | Go to Step 2 | |||||||||||||||||
2 |
Does the scan tool display DTC P0101, P0230, P0601, P0602, P1626, P1630, or P1631? | -- | Go to Step 3 | |||||||||||||||||
Does the test lamp illuminate on at least one side of the fuses listed? | -- | Go to Step 4 | Go to Ignition Relay Diagnosis | |||||||||||||||||
4 |
Does the J 26792 spark? | -- | Go to Step 5 | |||||||||||||||||
Command the fuel pump ON with a scan tool. Does the fuel pump turn ON? | -- | Go to Step 6 | ||||||||||||||||||
Do all of the Cylinder Injector Circuit Status parameters display OK? | -- | Go to Step 7 | ||||||||||||||||||
7 |
Is the fuel pressure within the specified range when the fuel pump is operating? | 358-405 kPa (52-59 psi) | Go to Step 8 | Go to Fuel System Diagnosis | ||||||||||||||||
8 | Inspect for the following conditions:
Did you complete the action? | -- | Go to Step 9 | -- | ||||||||||||||||
9 |
Does the engine start and continue to operate? | -- | Go to Step 10 | Go to Step 2 | ||||||||||||||||
10 |
Are there any DTCs that have not been diagnosed? | -- | System OK |