FixVault

DTC P0689: Notes

DTC P0689 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0689 ECM/PCM power relay sense circuit low
DETECTION CONDITION 
  • 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 circuit indicates OFF, ACC, or LOCK position.
POSSIBLE CAUSE 
  • Ignition circuit fuse (MAIN, IG KEY 1, IG KEY 2)
  • Open circuit between battery positive terminal and PCM terminal 1 BD
  • Short to ground circuit between battery positive terminal and PCM terminal 1 BD
  • Ignition switch malfunction
  • PATS system malfunction
G04969302Courtesy of MAZDA MOTORS CORP.