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DTC P1562 [AJ]

BME010201500201

DTC P1562 | PCM +BB (back-up battery) voltage low
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DETECTION CONDITION | • The PCM monitors the voltage of back-up battery positive terminal at PCM terminal 55. If the PCM detected battery positive terminal voltage below 2.5 V for 2 s, the PCM determines that the backup voltage circuit has malfunction. Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Meltdown ROOM fuse. • Open circuit in wiring between battery positive terminal and PCM terminal 55 • Poor connection of PCM connector. • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT ROOM 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. • Inspect for continuity between EEC fuse terminal and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground and install new fuse, then go to Step 7.
No | Go to step 7.
5 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Disconnect PCM connector. • Inspect 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 CIRCUIT • Disconnect battery cables. • Disconnect the PCM connector. • Inspect for continuity between EEC fuse terminal and PCM terminal 55. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit, then go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P1562 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch off, then start engine. • Is the PENDING CODE of same DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.