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DTC B1318 (63)

BME040200000W11

  Caution

  • When attaching the tester lead to the ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) or the ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) harness connector, the SST (49 G066 001) must be used. (See ABS HU/CM INSPECTION.) (See ABS/TCS HU/CM INSPECTION.)

DTC | B1318 (63) | ABS (ABS/TCS) HU/CM power supply
DETECTION CONDITION | • Voltage at Z terminal of ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) drops below 9 V when driving vehicle.
POSSIBLE CAUSE | • Low power supply • Battery and/or generator malfunction • Poor ground or open circuit of ground

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Turn ignition key to OFF. • Disconnect ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) connector. • Connect SST (adapter harness) to ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) connector (harness side) with ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) disconnected.
• Start engine.
• Measure voltage between terminal Z of SST (harness side) and ground.
• Is voltage above 9 V?
Yes
Go to next step.
No | Go to Step 3.
2 | INSPECT ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) GROUND CIRCUIT FOR POOR GROUND AND OPEN CIRCUIT • Turn ignition key to OFF. • Measure resistance between terminal AA of SST and ground. • Is resistance within 0-1 kilohm? | Yes | Go to Step 5.
No | If there is no continuity: • Repair or replace harness for open between ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS) and ground, then go to Step 5. If resistance is not within 0-1 kilohm: • Repair or replace harness for poor ground then go to Step 5.
3 | INSPECT BATTERY POWER • Inspect battery. (See ENGINE TECHNICAL DATA) • Is it okay? | Yes | Go to next step.
No | Replace battery, then go to Step 5.
4 | INSPECT GENERATOR • Inspect generator. (See GENERATOR INSPECTION [L3]).) (See GENERATOR INSPECTION [MZR-CD (RF Turbo)]) • Is it okay? | Yes | Go to next step.
No | Repair or replace generator, then go to Step 5.
5 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnected all disconnected connectors. • Clear DTC from memory. (See Clearing DTCs Procedure) • Is same DTC present? | Yes | Replace ABS/TCS HU/CM (with TCS) or ABS HU/CM (without TCS), then go to next step.
No | Go to next step.
6 | VERIFY AFTER REPAIR PROCEDURE • Is there any other DTC present? | Yes | Go to applicable DTC inspection.
No | Troubleshooting completed.