DTC 51 - Valve Relay Circuit

NOTE: If after all testing procedures have been completed system is not functioning properly, substitute ECU with known-good unit and retest.

Remove and test valve relay. See HYDRAULIC UNIT RELAYS under COMPONENT TESTING. Replace relay if faulty. If relay is okay, reinstall valve relay and go to next step.
Disconnect ECU 26-pin connector. Using a DVOM, check resistance between ECU connector terminal No. 8 and ground. See Figure. If resistance is infinite, replace ECU. If resistance is not infinite, repair short between ECU connector and valve relay. See WIRING DIAGRAM .