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DTC B1318

BHE060201038W03

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 | • Short to ground in wiring harness between EPS control module terminal 2P and battery • Battery malfunction • Generator malfunction • Poor connection of each connector

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT POWER SUPPLY VOLTAGE USING WDS OR EQUIVALENT • Turn the ignition switch off. • Connect the WDS or equivalent 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. (See BATTERY INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Repair or replace the battery, then go to Step 6. (See BATTERY REMOVAL/INSTALLATION.)
3 | INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Repair or replace the generator, then go to Step 6. (See GENERATOR REMOVAL/INSTALLATION.)
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. (See Clearing DTCs Procedure.) • 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 DTC Table.)
No | DTC troubleshooting completed.