DTC B1317, B1318

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DTC B1317, B1318

B3E060201038W04

DTC | B1317, B1318 | Battery power supply
DETECTION CONDITION | • Low voltage or high voltage are detected at the voltage monitor.
POSSIBLE CAUSE | • Open or short circuit in wiring harness between EHPAS control module terminal 1B and battery positive terminal • Battery and/or generator malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BATTERY VOLTAGE • Is the battery terminal voltage normal? | Yes | Make sure that battery terminal connection is okay. Go to the next step.
No | Charge or replace the battery, then go to Step 6.
2 | INSPECT BATTERY GRAVITY • Is the battery specific gravity as specified? | Yes | Go to the next step.
No | Replace the battery, then go to Step 6.
3 | INSPECT CHARGING SYSTEM • Are the generator and drive belt tension normal? | Yes | Go to the next step.
No | Replace the generator and/or drive belt if necessary. Go to step 6.

4

INSPECT EHPAS CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT
• Start the engine.
• Measure the voltage between following EHPAS control module terminal (wiring harness-side) and ground.

  - EHPAS control module: 1B-ground

• Is the voltage 10 V or more?

Yes

Go to the next Step.

No | Repair or replace the wiring harness for open circuit between the EHPAS control module and ground, then go to Step 6.

5

INSPECT EHPAS CONTROL MODULE GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
• Turn the ignition switch off.
• Measure the resistance between the following EHPAS control module terminal (wiring harness-side) and ground.

  - EHPAS control module: 1A-ground

• Is the resistance within 0-1 ohm?

Yes

Go to the next step.

No | If there is no continuity: • Repair or replace the wiring harness for open circuit between the EHPAS control module and ground, then go to the next step. If the resistance is not within 0-1 ohm: • Repair or replace the wiring harness for poor ground, then go to the next step.
6 | VERIFY THAT THE SAME DTC IS NOT PRESENT • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See Clearing DTCs Procedure.) • Is the same DTC present? | Yes | Replace the electric power steering oil pump, then go to the next step. (See ELECTRIC POWER STEERING OIL PUMP (LF) REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.