DTC P2507: Notes
DTC P2507 DETECTION CONDITION AND POSSIBLE CAUSES
| 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.
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| POSSIBLE CAUSE |
- Melt down EEC fuse
- Open circuit in the wiring harness between the EEC fuse and PCM terminal 2Z
- Short to ground between the EEC fuse and PCM terminal 2Z
- Poor connection of the PCM connector.
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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