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15. ERRATIC CMP SIGNAL Turn the ignition off. With a lab scope probe and the Miller special tool #6801, backprobe the (K44) CMP Signal circuit in the CMP WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands Wiggle the related wire harness and lightly tap on the Cam Position Sensor. Observe the lab scope screen. Look for any pulses generated by the CMP Sensor. Allow the engine to idle. Observe the lab scope screen. Did the CMP Sensor generate any pulses? Yes >> Inspect the related wire harness and replace the Camshaft Position Sensor if no wiring problems were found. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Test Complete. 9 - 368 ENGINE ELECTRICAL DIAGNOSTICS LX |