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Home >> Ford >> 2008 >> Explorer 4.6 8, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Powertrain DTC Charts And Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> P0689 - Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Sense Circuit Low
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P0689 - Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Sense Circuit Low

P0689 - ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY SENSE CIRCUIT LOW

Description:  This DTC sets when the passive anti theft system (PATS) system indicates the key is in ON or START position and the ignition switch position run (ISP-R) circuit indicates OFF, ACC, or LOCK position.
Possible Causes: 
  • Ignition circuit fuse
  • ISP-R circuit open in the harness
  • ISP-R circuit short to ground in the harness
  • Damaged ignition switch
  • Damaged PATS system
Diagnostic Aids:  Diagnose and repair all PATS DTCs first.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST B .