DTC B1317, B1318 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2886900

DTC | B1317, B1318 | Power supply system
DETECTION CONDITION | • B1317 ― Voltage at DSC HU/CM terminal J is more than 16.8 V. • B1318 ― While the vehicle is driven at a speed of 15 km/h {9.3 mph} or higher, voltage at DSC HU/CM terminal J is less than 9.6 V (less than 9.3 V during control).
POSSIBLE CAUSE | • Battery deterioration • Generator malfunction • ENGINE 15A fuse malfunction • Open circuit or short to ground in the wiring harness between the DSC HU/CM terminal J and the battery • Open circuit or faulty ground in the wiring harness between the DSC HU/CM terminal D and the body ground • Poor connection at connectors (female terminal)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BATTERY VOLTAGE • Is the battery terminal voltage normal? | Yes | Make sure that battery terminal connection is normal. Go to the next step.
No | Charge or replace the battery, then go to Step 6. (See BATTERY RECHARGING [L8, LF].) (See BATTERY REMOVAL/INSTALLATION [L8, LF].)
2 | INSPECT BATTERY GRAVITY • Is battery specific gravity as specified? | Yes | Go to the next step.
No | Replace the battery, then go to Step 6. (See BATTERY REMOVAL/INSTALLATION [L8, LF].)
3 | INSPECT CHARGING SYSTEM • Are the generator and drive belt tensions normal? | Yes | Go to the next step.
No | Replace generator and/or drive belt as necessary, then go to Step 6. (See GENERATOR REMOVAL/INSTALLATION [L8, LF].) (See DRIVE BELT REPLACEMENT [L8, LF].)
4 | INSPECT DSC HU/CM POWER SUPPLY FOR OPEN CIRCUIT • Start the engine. • Measure the voltage between DSC HU/CM terminal J and ground. • Is the voltage approx. 10 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between the DSC HU/CM and ground, then go to Step 6.
5 | INSPECT DSC HU/CM GROUND FOR POOR GROUND OR OPEN CIRCUIT • Turn the ignition switch off. • Measure the resistance between ground and DSC HU/CM terminal D. • 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 DSC HU/CM 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 TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 15 km/h {9.3 mph} or more. • Is the same DTC present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No | DTC troubleshooting completed.