DTC 52 - 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.
- Remove valve relay. Using a DVOM, check voltage between ground and valve relay connector terminal No. 6. See Fig 1. If battery voltage is not present, repair circuit between fusible link No. 9 and valve relay. See WIRING DIAGRAM . If battery voltage is present, go to next step.
- Disconnect ECU connectors. Check voltage between ECU connector terminal No. 8 and ground. If battery voltage is not present, check and repair connectors and related wiring harness between fuse No. 15 and ECU. See WIRING DIAGRAM . If battery voltage is present, go to next step.
- Disconnect Hydraulic Unit (HU) 8-pin connector. Ensure ignition is on. Check voltage between ground and 8-pin connector terminals No. 3, 4, 7 and 8. See Figure. If battery voltage is not present at any terminal, repair wiring harness between valve relay and HU. See WIRING DIAGRAM . If battery voltage is present, go to next step.
- Check and repair HU connector. If connector is okay, repair wiring harness between ECU and HU. See WIRING DIAGRAM .