Symptom Related Diagnostic Procedures
ENGINE CRANKS BUT DOES NOT RUNCIRCUIT DESCRIPTION
The engine needs proper compression, sensor inputs, fuel supply, proper fuel and cylinder temperature, and electrical power to start successfully. If any of the following systems or components malfunction, a no-start condition may exist:
^ The Crankshaft Position (CKP) sensor, Camshaft Position (CMP) sensor, and the fuel pressure sensor
^ The starting and charging system
^ The glow plug system
^ The fuel heater
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 conditions:
^ Proper cranking speed, 100 RPM cold - 180 RPM hot (a scan tool can be used to check cranking speed by pulling the ignition 1 relay and monitoring engine speed on scan tool while cranking)
^ Water or foreign material in fuel system
^ Basic engine problem
If the Crankshaft Position (CKP) sensor and the Camshaft Position (CMP) sensor are disconnected or malfunctioning at the same time, an Engine Cranks But Will Not Run condition will exist.
TEST DESCRIPTION
Steps 1-9:
Steps 10-19:
Steps 20-27:
The numbers below refer to the step numbers on the diagnostic table.
7. If DTC P0380 has not set, a glow plug system problem between the relay and the glow plugs may still exist. This problem would show up more on cold start or in cold weather.
8. A problem in the Crankshaft Position (CKP) sensor and the Camshaft Position (CMP) sensor circuits will cause no RPM signal, crank no start condition. This problem is in the 12-volt reference circuit. Either the circuit is open, or a sensor is shorting the circuit to ground.
9. If the cranking speed is not high enough, the engine will not start. See the Diagnostic Aids.
10. The vehicle theft deterrent system will disable the fuel system if the alarm is activated.
15. If the fuel system cannot be pressurized by priming, a no start problem will exist.