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. |
Step | Action | Values | Yes | No | ||||||||||||||
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Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views | ||||||||||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | ||||||||||||||
2 |
Does the scan tool display DTC P0230, P0335, P0336, P0340, P0385, P0386, P0403, P0404, P0601, P0602, P0604, P1372, P1404, P1621, P1630, P1631, P2610? | -- | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 3 | ||||||||||||||
3 | Inspect the fuse that supplies ignition voltage to the ignition control modules. Is the fuse open? | -- | Go to Step 4 | |||||||||||||||
4 | Command the fuel pump relay ON with a scan tool. Does the fuel pump operate? | -- | Go to Step 5 | |||||||||||||||
5 |
Is the fuel pressure within the specified range while the fuel pump is operating? | 284-325 kPa (41-47 psi) | Go to Step 6 | Go to Fuel System Diagnosis | ||||||||||||||
6 | Inspect for the following conditions:
Did you complete the action? | -- | Go to Step 7 | -- | ||||||||||||||
7 |
Does the engine start and continue to operate? | -- | Go to Step 8 | Go to Step 2 | ||||||||||||||
8 |
Are any DTCs displayed? | -- | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |