DTC B1318 [AUTO LIGHT/WIPER CONTROL MODULE]

id0902j1831000

DTC B1318

Battery voltage low
DETECTION CONDITION
Input voltage from the battery is excessively low
POSSIBLE CAUSE
•  Battery malfunction
•  METER 10 A fuse
•  Auto light/wiper control module connector malfunction
•  Short to GND in wiring harness between auto light/wiper control module terminal 2C and battery
•  Open circuit in wiring harness between auto light/wiper control module terminal 2C and battery
•  Auto light/wiper control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
BATTERY INSPECTION
•  Disconnect the battery cables.
•  Refer to the battery inspection and inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Replace or charge the battery.
(See BATTERY REMOVAL/INSTALLATION [13B-MSP].)
(See BATTERY RECHARGING [13B-MSP].)
Go to the Step 6.
2
FUSE INSPECTION
•  Remove the METER 10 A fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
Replace the fuse.
After replacement, go to Step 6.
3
INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR
•  Disconnect the auto light/wiper control module connector.
•  Inspect the auto light/wiper control module connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 6.
No
Go to the next step.
4
INSPECT AUTO LIGHT/WIPER CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GND
•  Inspect for continuity between auto light/wiper control module terminal 2C (wiring harness-side) and body GND.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to the Step 6.
No
Go to the next step.
5
INSPECT AUTO LIGHT/WIPER CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Install the METER 10 A fuse.
•  Inspect for continuity between following terminals:
―  Auto light/wiper control module terminal 2C and ignition switch terminal C.
―  Ignition switch terminal F and battery positive terminal.
•  Is there continuity?
Yes
Go to the next step.
No
Repair/replace the wiring harness.
After repair procedure, go to the next step.
6
VERIFY DTC
•  Reconnect the disconnected connectors and the negative battery cable.
•  Clear DTCs using the M-MDS.
•  Perform the auto light/wiper control module DTC inspection using the M-MDS.
•  Is DTC B1318 displayed?
Yes
Replace the auto light/wiper control module, then go to the next step.
(See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are there other DTCs output?
Yes
Perform the corresponding DTC inspection.
(See DTC TABLE [AUTO LIGHT/WIPER CONTROL MODULE].)
No
DTC troubleshooting completed.