DTC B1318 [AUTO LIGHT/WIPER CONTROL MODULE]

id0902j1831000

DESCRIPTION

Low battery power supply voltage
DETECTION CONDITION
•  Auto light/wiper control module power supply circuit voltage is excessively low.
POSSIBLE CAUSE
•  PCM DTC is stored
•  Auto light/wiper control module connector or terminals malfunction
•  Open circuit or short to ground in auto light/wiper control module power supply circuit
―  Short to ground in wiring harness between auto light/wiper control module terminal A and ignition switch*1/relay block*2
―  METER 15 A fuse malfunction
―  Open circuit in wiring harness between auto light/wiper control module terminal A and ignition switch*1/relay block*2
•  Auto light/wiper control module malfunction

*1  :Vehicles without advanced keyless entry and push button start system
*2  :Vehicles with advanced keyless entry and push button start system

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM PCM DTC
•  Perform the DTC Reading Procedure to confirm the PCM DTC.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [LF, L5].)
(See DTC TABLE [ZY, Z6].)
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)
(See DTC TABLE [MZR-CD 2.2].)
(See DTC TABLE [MZR 2.0 DISI i-stop].)
(See DTC TABLE [L3 Turbo].)
No
Go to the next step.
2
INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the auto light/wiper control module connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 4.
No
Go to the next step.
3
INSPECT AUTO LIGHT/WIPER CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Auto light/wiper control module connector is disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage between the auto light/wiper control module terminal A (wiring harness-side) and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the METER 15 A fuse.
•  If the fuse is melt:
―  Repair or replace the wiring harness for a possible short to ground.
―  Replace the fuse.
•  If the fuse is deterioration:
―  Replace the fuse.
•  If the fuse is normal:
―  Repair or replace the wiring harness for a possible open circuit.
Go to the next step.
4
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the auto light/wiper control module DTC inspection using the M-MDS.
•  Is the same DTC present?
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.
5
VERIFY THAT NO OTHER DTCs ARE RECORDED
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AUTO LIGHT/WIPER CONTROL MODULE].)
No
DTC troubleshooting completed.