DTC B1318

id060200801900

DTC
B1318
Battery power supply
DETECTION CONDITION
•  Voltage of 10 V or less or 16 V or more detected by EPS control module internal ignition voltage observation.
POSSIBLE CAUSE
•  Battery malfunction
•  Generator malfunction
•  Poor connection of EPS control module connector
•  EPS control module connector or terminal malfunction
•  Short to ground in wiring harness between EPS control module terminal 2P and battery
•  EPS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT POWER SUPPLY VOLTAGE USING M-MDS
•  Turn the ignition switch off.
•  Connect the M-MDS to the DLC-2.
•  Turn the ignition switch to the ON position (engine off).
•  Access B+ PID.
•  Is the voltage normal?
Yes
Malfunction may be temporary. Go to Step 6.
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is it normal?
Yes
Go to the next step.
No
Repair or replace the battery, then go to Step 6.
(See BATTERY REMOVAL/INSTALLATION [13B-MSP].)
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is it normal?
Yes
Go to the next step.
No
Repair or replace the generator, then go to Step 6.
(See GENERATOR REMOVAL/INSTALLATION [13B-MSP].)
4
INSPECT WHETHER MALFUNCTION IS CAUSED BY POOR CONNECTION OF EPS CONTROL MODULE OR PIN DEFORMATION
•  Turn the ignition switch off.
•  Inspect connection of the EPS control module and wiring harness.
•  Disconnect the EPS control module connector.
•  Inspect whether malfunction is caused by bent or poorly connected EPS control module connector pin.
•  Are the connector connection, connector pins, and wiring harness normal?
Yes
Go to the next step.
No
Repair or replace the malfunction connector wiring harness, then go to Step 6.
5
INSPECT EPS CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
•  Disconnect the battery positive terminal.
•  Inspect for continuity between EPS control module terminal 2P and ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for short to ground between EPS control module terminal 2P and ground, then go to Step 6.
No
Go to the next step.
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the memory.
•  Turn the ignition switch off.
•  Start the engine.
•  Is the same DTC present?
Yes
Replace the EPS control module, then go to the next step.
(See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
No
DTC troubleshooting completed.