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 cranking speed is within specifications. 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.
Step | Action | Value(s) | Yes | No | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform A Diagnostic System Check-Engine Controls? | -- | Go to Step 2 | |||||||||||||||||
2 |
Does the scan tool display DTCs P0230, P0335, P0336, P0601, P0602, P0604, P1626, P1631 or P1683? | -- | Go to Step 3 | |||||||||||||||||
Important: Ensure the fuses listed below are not open, before proceeding with this test.
Does the test lamp illuminate on both sides of all the fuses listed? | -- | Go to Step 4 | Go to Ignition Relay Diagnosis | |||||||||||||||||
4 |
Does the engine speed increment? | -- | Go to Step 5 | |||||||||||||||||
With a scan tool, command the fuel pump ON. Does the fuel pump turn ON? | -- | Go to Step 6 | ||||||||||||||||||
6 |
Is the fuel pressure within the specified range while the fuel pump is operating? | 414-455 kPa (60-66 psi) | Go to Step 7 | Go to Fuel System Diagnosis | ||||||||||||||||
7 |
Does the spark tester spark? | -- | Go to Step 8 | |||||||||||||||||
8 | Inspect for the following conditions:
Did you find and correct the condition? | -- | Go to Step 9 | Go to Intermittent Conditions | ||||||||||||||||
9 |
Does the engine start and continue to operate? | -- | Go to Step 10 | Go to Step 2 | ||||||||||||||||
10 |
Are any DTCs displayed? | -- | Go to Step 11 | |||||||||||||||||
11 | With a scan tool review the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? | -- | System OK |