DTC B1318 [POWER LIFTGATE (PLG) SYSTEM]

id0902e9395000

DTC B1318 | Power supply voltage decreases
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DETECTION CONDITION | Input voltage from the battery is excessively low (below 10.5 V)
POSSIBLE CAUSE | • PLG 20 A fuse malfunction • Battery malfunction • Generator malfunction • Open or short circuit in wiring harness between PLG control module terminal 1C and battery • PLG control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT FUSE • Remove the PLG 20 A fuse. • Is the fuse normal? | Yes | Go to the next step.
No | Replace the fuse.
2 | INSPECT BATTERY VOLTAGE • Inspect the battery voltage. (See BATTERY INSPECTION [MZI-3.7].) • Is the battery voltage normal? | Yes | Go to the next step.
No | Recharge or replace the battery. Go to Step 5.
3 | INSPECT FOR PCM DTCs • Connect the M-MDS to the DLC-2. • Are any DTCs for the PCM displayed? | Yes | Perform troubleshooting according to the corresponding DTC inspection. Go to Step 5.
No | Go to the next step.
4 | INSPECT THE FOLLOWING WIRING HARNESSES • Disconnect the negative battery cable. • Disconnect the positive battery cable. • Disconnect the PLG control module connector. • Inspect the wiring harness between PLG control module terminal 1C (wiring harness-side) and positive battery terminal (wiring harness-side) for an open circuit/short circuit to ground system. • Is the wiring harness normal? | Yes | Repair or replace the wiring harness. Go to the next step.
No | Go to the next step.
5 | VERIFY CORRECTION COMPLETED • Reconnect the disconnected connector. • Clear the DTC. • Operate the PLG system. • Is DTC B1318 stored? | Yes | Replace the PLG control module. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.