Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Mazda >> 2007 >> 3 Mazdaspeed, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic (Engine Control System L3 With TC) - (5 Of 5) >> DTC P2507 >> Notes

DTC P2507: Notes

DTC P2507 [L3 WITH TC] DETECTION CONDITION AND POSSIBLE CAUSE

DTC P2507 PCM +BB (back-up battery) voltage low
DETECTION CONDITION 
  • The PCM monitors the voltage of the back-up battery positive terminal. If the PCM detects that the battery positive terminal voltage is below 2.5 V for 2 s, the PCM determines that the backup voltage circuit has a malfunction  .

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTCs are stored in the PCM memory.
POSSIBLE CAUSE 
  • Melt down fuse
  • Open circuit in the wiring harness between the fuse and PCM terminal 1BA
  • Short to ground between the fuse and PCM terminal 1BA
  • Poor connection of the PCM connector.
  • PCM malfunction
G04954423Courtesy of MAZDA MOTORS CORP.
scientia non olet · About Mike's Workshop Manuals