C2320

DTC C2308 FL INLET VALVE MAL.
DTC C2312 FL OUTLET VALVE MAL.
DTC C2316 FIR INLET VALVE MAL.
DTC C2320 FIR OUTLET VALVE MAL.
DTC C2324 RL INLET VALVE MAL.
DTC C2328 RL OUTLET VALVE MAL.
DTC C2332 RR INLET VALVE MAL.
DTC C2336 RR OUTLET VALVE MAL.

COMPONENT LOCATION:

GENERAL DESCRIPTION
The ABS HECU is composed of an ECU (Electronic Control Unit) and a HCU( Hydraulic Control Unit), so the HECU hardware includes all solenoid valves inside the unit as well as the ECU. Solenoid valves are switched to ON, OFF by HECU when the ABS is activated. Solenoid valves function is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder.

DTC DESCRIPTION
The HECU monitors the operation of the valves by checking the drive circuit of the solenoid valves, and then sets this code when the unexpected drive voltage is detected. For example, the HECU sets the DTC if an unexpected high drive voltage is detected when the valve relay is switched to OFF,

DTC DETECTING CONDITION

DTC DETECTING CONDITION:

COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed of approximately 15 km/h or more (9 mph or more).
Does warning lamp remain ON?
YES
- Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to Verification of Vehicle Repair procedure.
NO
- Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select Diagnostic Trouble Codes (DTCs) mode.
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information. (Start and drive vehicle in gear and maintain vehicle speed of approximately 15 km/h or more (9 mph or more))
Are any DTCs present?
YES
- Go to the applicable troubleshooting procedure.
NO
- A system performs normally at this time.