Symptom Related Diagnostic Procedures

CIRCUIT DESCRIPTION
This table verifies that all basic engine systems are operating properly. This includes the battery condition, the engine cranking speed, the glow plugs, and the fuel delivery system.

DIAGNOSTIC AIDS
If no trouble is found and the cause of an Engine Cranks But Does Not Run has not been found, check for the following conditions:
^ Proper cranking speed, 100 RPM cold- 180 RPM hot (a scan tool can be used to check cranking speed by pulling the ENG 1 fuse and monitoring Engine Speed on scan tool while cranking).
^ Water or foreign material in the fuel system
^ Basic engine condition

If the crankshaft position sensor and the optical/fuel temperature are disconnected or malfunctioning at the same time, an Engine Cranks But Does Not Run condition will exist.

TEST DESCRIPTION

Steps 1-10:

Steps 11-24:

The numbers below refer to the step numbers on the diagnostic table.
6. This step checks for proper cranking speed (see Diagnostic Aids).
8. This step will check the ground wire on the injection pump (wire located on top of pump).
12. This step will determine if the injection pump or wiring is at fault.
13. This step will determine if the fuel injection control voltage is present by probing at the black/gray 4 wire connector jumper harness, instead of at the 6 wire pump connector.