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 or higher, voltage at DSC HU/CM terminal J is less than 9.6 V (less than 9.3 V during control).
FAIL-SAFE
•  B1317
―  Inhibits EBD, ABS, TCS, and DSC controls, and illuminates brake system warning light, ABS warning light and DSC indicator light.
(If ignition voltage is continuously less than 16.6 V for 1 s, enables (restores) each control and turns each light off.)
•  B1318
―  Inhibits ABS, TCS, and DSC controls, and illuminates ABS warning light and DSC indicator light.
(If ignition voltage is more than 9.8 V, enables (restores) each control and turns each light off.)
POSSIBLE CAUSE
•  Battery deterioration
•  Generator malfunction
•  ENGINE 15 A 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.
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.
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.
4
INSPECT ABS 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.
•  Start the engine and drive the vehicle at 15 km/h {9.3 mph} or more.
•  Is the same DTC present?
Yes
Replace the DSC HU/CM, then go to the next step.
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.