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DTC B1318 [ABS (ABS/TCS)]

id040214805300

DTC | B1318 | ABS (ABS/TCS) power supply
DETECTION CONDITION | • Low voltage is detected at the voltage monitor of solenoid valve monitor, or the motor monitor
POSSIBLE CAUSE | • Malfunction of fuse (SAS 10 A) • Open circuit or short to power supply in harness between ABS (ABS/TCS) HU/CM terminal Z and battery positive terminal • Open circuit in harness between body ground and ABS (ABS/TCS) HU/CM terminal AC • Battery and/or generator malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BATTERY VOLTAGE • Is battery terminal voltage normal? | Yes | Make sure that battery terminal connection is normal. Go to the next step.
No | Charge or replace battery, then go to Step 6.
2 | INSPECT BATTERY GRAVITY • Is battery specific gravity as specified? | Yes | Go to the next step.
No | Replace battery, then go to Step 6.
3 | INSPECT CHARGING SYSTEM • Are generator and drive belt tensions normal? | Yes | Go to the next step.
No | Adjust drive belt tension as necessary. Replace generator and/or drive belt as necessary.
4 | INSPECT ABS (ABS/TCS) HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Start engine. • Measure voltage between ABS (ABS/TCS) HU/CM terminal Z and ground. • Is voltage above 10 V? | Yes | Go to the next step.
No | Go to Step 6.
5 | INSPECT ABS (ABS/TCS) HU/CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT • Turn the ignition switch off. • Measure resistance between ground and ABS (ABS/TCS) HU/CM terminal AC. • Is resistance within 0-1 ohm? | Yes | Go to the next step.
No | If there is no continuity: • Repair or replace harness for open circuit between ABS (ABS/TCS) HU/CM and ground, then go to the next step. If resistance is not within 0-1 ohm: • Repair or replace harness for poor ground then 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 Procedures.) • Is same DTC present? | Yes | Replace ABS (ABS/TCS) HU/CM, then go to the next step.
No | Go to the next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Is there any other DTC present? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | Troubleshooting completed.