#
DTC P2507 [AJ]

BME010202500W03

DTC P2507 | PCM +BB (back-up battery) voltage low
--- | ---
DETECTION CONDITION | • The PCM monitors the voltage of back-up battery positive terminal at PCM terminal 86. If the PCM detected battery positive terminal voltage below 2.5 V for 2 seconds, the PCM determines that the backup voltage circuit has malfunction. Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Burnt EEC fuse. • Open circuit in wiring between battery positive terminal and PCM terminal 86 • Short to ground in wiring between battery positive terminal and PCM terminal 86 • Poor connection of PCM connector. • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Check for related Service Information and/or on-line repair information availability. • Is any repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT EEC FUSE • Turn the ignition switch off. • Inspect EEC fuse for failure and proper. • Is it normal? | Yes | Go to step 5.
No | • If EEC fuse has been melt down, then go to the next step. • If EEC fuse is not installed correctly, install it correctly then go to Step 7.
4 | INSPECT MONITOR CIRCUIT FOR SHORT TO GROUND • Disconnect battery cables. • Check continuity between EEC fuse terminal and body ground. • Is there continuity? | Yes | Repair or replace harness for short to ground and install new fuse, then go to Step 7.
No | Go to step 7.
5 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Disconnect PCM connector. • Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair terminals, then go to Step 7.
No | Go to the next step.
6 | INSPECT MONITOR CIRCUIT FOR OPEN • Disconnect battery cables. • Connect the PCM connector. • Check continuity between EEC fuse terminal and PCM terminal 86. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace harness for open, then go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P2507 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch off then engine start. • Is same DTC's pending cord present? | Yes | Replace PCM, then go to the next step.
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.