Circuit DescriptionThe crankshaft position and camshaft position sensors are Hall effect type sensors. The electronic control module (ECM) provides a 5 volt supply to the position sensor and a return circuit. As the teeth on the crankshaft speed ring or the dimples in the back of the camshaft gear move past the position sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and converts it to an engine speed. A missing tooth on the crankshaft gear is used by the ECM to determine the position of the engine.

Component LocationThe crankshaft position and camshaft position sensor location varies, depending on engine model.

Conditions for Running the DiagnosticsThis diagnostic runs continuously when the engine is operating.

Conditions for Setting the Fault CodesThe ECM detects that the crankshaft position and camshaft position signal inputs to the ECM are reversed.

Action Taken When the Fault Code is ActiveThe ECM illuminates the red STOP ENGINE light and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.Diesel exhaust fluid injection into the aftertreatment system is disabled.Active and stationary regeneration of the diesel particulate filter will be disabled.The EGR valve will be closed.Conditions for Clearing the Fault CodeTo validate the repair, start the engine and let it idle for 1 minute.The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.The ECM will turn off the red STOP ENGINE light immediately after the diagnostic runs and passes.For OBD engines, the ECM will turn off the MIL after three consecutive trips where the diagnostic runs and passes.The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD engines.

Shop TalkThis fault code indicates the crankshaft position sensor and the camshaft position sensor wiring harness connectors are reversed. As a result, the engine will not start.

Possible Cause:1) ECM calibration