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DTC P2507:00: Notes

DTC P2507:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P2507:00 PCM battery voltage low input
DETECTION CONDITION 
  • The PCM monitors the voltage of backup battery positive terminal. If the PCM detects battery positive terminal voltage below 2.5 V for 5 s  when the battery voltage is more than 8 V  , the PCM determines that the backup voltage circuit has a malfunction.
Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • The DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • Battery malfunction
  • PCM connector or terminals malfunction
  • Short to ground or open circuit in PCM power supply circuit
    • Short to ground in wiring harness between battery positive terminal and PCM terminal 1C
    • ENG+B 10 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and PCM terminal 1C
  • PCM malfunction
G06733898Courtesy of MAZDA MOTORS CORP.
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