Check RPM Signal While Cranking

ByDieselIQ

Purpose:
To determine if the CaMshaft Position (CMP) sensor and circuit are functioning.

Recommended Procedure:
Connect the OBDII Scan Tool to the data link connector (DLC) under the dash. Access RPM PID on Scan Tool menu and monitor rpm reading while cranking the engine. Scan tool will read rpm if PCM is receiving a CMP signal.

Possible Causes:

  • Faulty wire harness connection.
  • Poor CMP ground connection.
  • Incorrect CMP sensor to target wheel spacing.
  • Defective CMP sensor.

Tools Required:
Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent Scan tool.

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