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 HECU (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





MONITOR ACTUATION TEST
1. Connect scan tool to Data Link Connector (DLC)
2. Ignition "ON" & Engine "OFF".
3. Select the "Actuation Test" mode on the scan tool.
4. Inspect operating status of all valves with Actuation Test.





5. Do all valves operate normally?

YES
>Fault is intermittent caused by poor connection in power harness (ABS2) and/or HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification Of Vehicle Repair" procedure.

No
>Go to "W/Harness Inspection" procedure.

TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1200. C1200

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 20A ABS fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification of vehicle Repair" procedure.

GROUND CIRCUIT INSPECTION
Refer to DTC C1101. C1101

VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101. C1101