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.
1		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.
2		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.
3		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.
4		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.
5		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.)
6		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)].)
7		No	DTC troubleshooting completed.

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)