Circuit Description
This table assumes that battery condition and engine cranking speed are OK. The quantity and quality of fuel are OK and the glow plug system is operating properly.
Diagnostic Aids
If no trouble is found and the cause of an Engine Cranks But Will Not Run has not been found, check for the following items:
| • | Proper cranking speed, 100 RPMs cold - 180 RPMs hot (a scan tool can be used to check cranking speed by pulling the FUEL SOL fuse and monitoring Engine Speed on scan tool while cranking). |
| • | Water or foreign material in fuel system. |
| • | Basic engine problem. |
If the crankshaft position sensor and the optical/fuel temperature are disconnected or malfunctioning at the same time, an Engine Cranks But Will Not Run condition will exist.
Test Description
The number(s) below refer to the step number(s) on the Diagnostic Table.
-
This step checks for proper cranking speed. Refer to Diagnostic Aids.
-
This step will check the ground wire on the injection pump (the ground wire is located on top of the pump).
-
This step will determine if the injection pump or wiring is at fault.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Important: Before clearing the DTCs, use the scan tool Capture Info to save the Freeze Frame and Failure Records for reference. The control module's data is deleted once the Clear Info function is used. Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
2 | Check for proper condition of batteries. Refer to Engine Electrical. Is the condition of batteries OK? | -- | ||
3 | Check for adequate fuel in the tank. Is the fuel at an adequate level? | -- | ||
4 | Check the quality of fuel. Refer to Fuel Quality Diagnosis . Is the fuel quality OK? | -- | ||
5 | Check the glow plug system operation. Refer to Glow Plug System Check . Are the glow plugs operating OK? | -- | ||
Check for proper cranking speed. Refer to Engine Electrical. Is the cranking speed OK? | -- | |||
7 | Check for a restriction in the fuel return system. Refer to Fuel Return System Diagnosis . Does the fuel return system operate properly? | -- | ||
Check the injection pump ground wire (located on top of the injection pump). Is the ground OK? | -- | |||
9 | Turn the ignition ON. Does the MIL come ON? | -- | ||
10 | Install the scan tool. Does the scan tool display data? | -- | ||
11 |
Is there fuel at the each injection line? | -- | ||
Disconnect the optical/fuel temperature sensor. Does the vehicle start? | -- | |||
13 |
Is the voltage greater than or equal to the specified value? | V | ||
14 |
Is the test lamp ON? | -- | ||
15 |
Is the test lamp ON? | -- | ||
16 | Replace the fuel injection pump. Refer to Fuel Injection Pump Replacement . Is the action complete? | -- | -- | |
17 | The injection system is OK. Refer to Symptoms . Is the action complete? | -- | -- | |
18 | Check the fuel inject control circuit for an open or ground between the fuel solenoid driver and the PCM. Did you find a problem? | -- | ||
19 | Check the closure ground circuit for an open between the fuel solenoid driver and the PCM. Did you find a problem? | -- | ||
20 | Inspect the fuel solenoid driver connector and PCM connector for proper connection. Did you find a problem? | -- | ||
21 | Repair the open in the ignition feed circuit. Is the action complete? | -- | -- | |
22 | Repair the circuit as necessary. Is the action complete? | -- | -- | |
23 | Make the appropriate repairs. Is the action complete? | -- | -- | |
24 |
Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Is the action complete? | -- | -- | |
25 | Operate the vehicle within the conditions the symptom was noted. Does the system operate properly? | -- |
