#
DTC B1318 [DSC]

id040220805300

DTC | B1318 | DSC 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 or short to power circuit in harness between DSC HU/CM terminal G and battery positive terminal • Open circuit in harness between body ground and DSC HU/CM terminal A • 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 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 next step.
No | Replace battery, then go to Step 6.
3 | INSPECT CHARGING SYSTEM • Are generator and drive belt tension normal? | Yes | Go to next step.
No | Adjust drive belt tension as necessary. Replace generator and/or drive belt as necessary.
4 | INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Start engine. • Measure voltage between DSC HU/CM terminal G and ground. • Is voltage above 10 V? | Yes | Go to next step.
No | Go to Step 6.
5 | INSPECT DSC HU/CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT • Turn ignition key to OFF. • Measure resistance between ground and DSC HU/CM terminal A. • Is resistance within 0-1 ohm? | Yes | Go to next step.
No | If there is no continuity: • Repair or replace harness for open circuit between DSC HU/CM and ground, then go to next step. If resistance is not within 0-1 ohm: • Repair or replace harness for poor ground then go to next step.
6 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory. (See Clearing DTCs Procedures.) • Is same DTC present? | Yes | Replace DSC HU/CM, then go to next step.
No | Go to 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.