Motor Relay Circuit
- Check if hydraulic unit motor operates when vehicle speed exceeds 4 MPH. If motor does not operate, go to next step. If motor operates, check for short in harness. Repair as needed. Remove and test motor relay. See HYDRAULIC UNIT RELAYS under COMPONENT TESTING. If relay is okay, go to next step. Replace relay if faulty.
- Check pump motor ground connection. Ensure ground wire has a clean, tight connection. Repair if necessary. If ground connection is okay, go to next step.
- Install motor relay. Disconnect 2-pin connector. See Fig 1
. Measure voltage between terminal No. 51 and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair harness between fusible link and hydraulic unit 2-pin connector.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Connect hydraulic unit wiring harness. Disconnect ECU wiring harness connector. Using an ohmmeter, measure resistance between ECU harness connector terminals No. 2 and 26. See Figure
. Resistance should be 30-60 ohms. If resistance is not within specification, inspect and repair wiring harness between hydraulic unit and ECU. If resistance is within specification, replace faulty ECU.