ABS Control Relay
- Remove ABS control relay. See Figure. Continuity should exist between terminals No. 9 and 10. Continuity should not exist between terminals No. 7 and 8. See Fig 1.
- Using fused jumper wire, connect positive battery terminal to terminal No. 10. Connect negative battery terminal to terminal No. 9. Continuity should exist between terminals No. 7 and 8. Disconnect battery.
- Continuity should exist between terminals No. 1 and 9. Continuity should not exist between terminals No. 2 and 5.
- Using ohmmeter capable of testing diodes, check for continuity between terminals No. 4 and 5. Transpose ohmmeter leads. Repeat measurement. If continuity exists or circuit is open for both measurements, actuator diode is defective. Repair or replace relay, then go to next step. If continuity exists for only one measurement, temporarily substitute known good ABS ECU. Retest system.
- Using fused jumper wire, connect positive battery terminal to terminal No. 1. Connect negative battery terminal to terminal No. 9. Continuity should exist between terminals No. 1 and 5. Continuity should not exist between terminals No. 2 and 6. Replace relay if operation is not as specified.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002