C2112

DTC C2112 VALVE RELAY ERROR

COMPONENT LOCATION

Refer to DTC C1235. C1235

GENERAL DESCRIPTION

The HECU supplies battery power to all solenoid valves with a valve relay which is controlled by the Electronic Control UNIT(ECU). The valve relay and all solenoid valves are installed inside the HEM (Hydraulic and Electronic Control Unit).

DTC DESCRIPTION

The HECU monitors voltage of the valve relay to check if the HECU can perform ABS control normally. When the valve relay is switched to ON, the HECU will set this code if the solenoid drive voltage is below permissible voltage ranges for a period of time. When the valve relay is switched to OFF, the HECU sets this code if the solenoid drive voltage is over the permissible voltage range for a period of time.

DTC DETECTING CONDITION:

TERMINAL & CONNECTOR INSPECTION

Refer to DTC C1102. C1102

POWER SUPPLY CIRCUIT INSPECTION

1. Ignition "OFF".
2. Disconnect HECU connector.
3. Ignition "ON".
4. Measure voltage between terminal "3 of the HECU harness connector and chassis ground.





5. Is the measured voltage within specifications?

YES
^ Go to "Ground Circuit Inspection" procedure.

NO
^ Check for damaged harness and open or short to GND between the battery terminal(+) and terminal "3 of the HECU harness connector. Check for open or blown 20 A ABS fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification of vehicle Repair" procedure.

GROUND CIRCUIT INSPECTION

1. Ignition "OFF".
2. Disconnect HECU connector.
3. Measure resistance between terminal "4" of the HECU harness connector and chassis ground.





4. Is the measured resistance within specifications?

YES
^ Go to "Component Inspection" procedure.

NO
^ Check for damaged harness and poor connection between terminal "4" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification of vehicle Repair" procedure.

COMPONENT INSPECTION

Refer to DTC C1101. C1101

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101. C1101