Diagnostic Aids

If cause of NO-START - ENGINE CRANKS OKAY symptom has not been found, inspect for following conditions:

• Hard starting only in cold ambient temperatures.
• Correct cranking speed is 100 RPM cold and 180 RPM hot. A scan tool can be used to inspect cranking speed by pulling Ignition 1 relay and monitoring engine speed on scan tool while cranking.
• Water or foreign material in fuel system.
• A base engine mechanical fault.
• If Crankshaft Position (CKP) sensor and Camshaft Position (CMP) sensor are disconnected or malfunctioning at the same time, a NO-START - ENGINE CRANKS OKAY condition will exist.