DTC B1317, B1318 [APPLIED VIN (ASSUMED): JM0 DY10Y100 108402-, JM6 DY10*100 109001-]

id0402a4800300

DTC

B1317, B1318

ABS power supply

DETECTION CONDITION

• Low voltage and high voltage are detected at the voltage monitor of solenoid valve monitor, or the motor monitor

POSSIBLE CAUSE

• Malfunction of fuse (ABS-P (30 A), ABS-V (20 A), SAS (10 A))
• Open or short circuit in harness between ABS HU/CM terminal N and battery positive terminal
• Open or short circuit in harness between ABS HU/CM terminal Y and battery positive terminal
• Open or short circuit in harness between ABS HU/CM terminal Z and battery positive terminal
• Open circuit in harness between body ground and ABS HU/CM terminal B
• 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.
Go to step 6.
4
INSPECT ABS HU/CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT
• Start engine.
• Measure voltage between below connectors of ABS HU/CM connectors (harness side) and grounds.
- ABS HU/CM: N-ground
- ABS HU/CM: Y-ground
- ABS HU/CM: Z-ground
• Is voltage approx. 10 V?
Yes
Go to next step.
No
Repair or replace harness for open circuit between ABS HU/CM and ground, then go to Step 6.
5
INSPECT ABS HU/CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
• Turn ignition key to OFF.
• Measure resistance between ABS HU/CM terminal B (harness side) and grounds.
• 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 ABS 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.
• Is same DTC present?
Yes
Replace ABS CM, then go to next step.
No
Go to next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.