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DTC P0687: ECM/Pcm Power Relay Control Circuit High

DTC P0687: ECM/PCM POWER RELAY CONTROL CIRCUIT HIGH

Description:  This DTC sets when the PCM power relay is commanded ON and the PCMRC circuit voltage exceeds a calibrated value.
Possible Causes: 
  • PCMRC circuit short to voltage
  • Damaged PCM
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST B .
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