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Home >> Ford >> 2010 >> RV Cutaway 6.0 P >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Powertrain DTC Charts & Descriptions -- E-Series 6.0L Diesel Models >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> DTC P0683: Glow Plug Control Module (GPCM) To Powertrain Control Module (Pcm) Communication Circuit

DTC P0683: Glow Plug Control Module (GPCM) To Powertrain Control Module (Pcm) Communication Circuit

DTC P0683: GLOW PLUG CONTROL MODULE (GPCM) TO POWERTRAIN CONTROL MODULE (PCM) COMMUNICATION CIRCUIT

Description:  The PCM carries out a functional key ON, engine running (KOER) self-test for the glow plug system. During that test the PCM enables the GPCM and monitors the GPCM/PCM communication circuit for concerns. When the PCM detects a concern with a GPCM/PCM communication circuit, the DTC is set.
Possible Causes: 
  • GPCM/PCM communication circuit open in the harness
  • GPCM/PCM communication circuit short to ground in the harness
  • GPCM/PCM communication circuit short to voltage in the harness
Diagnostic Aids:  Diagnose DTC P0670 before diagnosing DTC P0683.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AF .
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