C2112

DTC C2112 VALVE RELAY ERROR

COMPONENT LOCATION
Refer to DTC C1604. C1604

GENERAL DESCRIPTION
The ABS ECU supplies battery power to all solenoid valves by the way of 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
ABS ECU monitors voltage of the valve relay to check if ABS ECU 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 scantool to Data Link Connector (DLC)
2. Ignition "ON" & Engine "OFF".
3. Select the "Actuation Test" mode on the scantool.
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 (ABS1) 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 next step.

TERMINAL AND CONNECTOR INSPECTION
Refer to DTC C1101. C1101

POWER CIRCUIT INSPECTION
1. Ignition "OFF"
2. Disconnect HECU connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal "25" 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 open or short in power harness between battery terminal(+) and terminal "25" of the HECU harness connector. Check for open or blown 40 A ABS1 use 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 "8, 24" 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 "8, 24" 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