Code 52: Valve Relay Always On
- Remove and test valve relay. See HYDRAULIC UNIT RELAYS under COMPONENT TESTING. Replace relay if faulty. If relay is okay, ensure ignition is off. Disconnect ABS ECU harness connector.
- Turn ignition on. Measure voltage between ECU harness connector terminal No. 13 and ground. See Figure . If battery voltage is present, replace ABS ECU and retest. If battery voltage is not present, inspect and repair circuit between ECU terminal No. 13 and relay receptacle No. 5.