C1912

Inspection 2: Motor Power Supply System
1. CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector and motor connector, and check terminal for deformation, disconnection, looseness, etc.
2. Reconnect harness connector securely, and perform self-diagnosis.








Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the terminal.
2. CHECK RAS MOTOR RELAY BATTERY CIRCUIT
1. Turn ignition switch OFF, and disconnect RAS motor relay harness connector B139.





2. Check voltage between RAS motor relay harness connector B126 and ground.
Terminal 3 - Ground: Battery voltage (Approximately 12 Volts)
OK or NG
OK >> GO TO 3.
NG >> RAS motor relay power supply circuit open or shorted. Repair or replace power supply circuit and fuse.
3. CHECK RAS MOTOR RELAY HARNESS
1. Disconnect RAS motor relay harness connector B139 and RAS control unit harness connector B136.





2. Check continuity between RAS motor relay harness connector B139 and RAS control unit harness connector B136.
Terminal 5 - 37: Continuity exist.
Terminal 1 - 25: Continuity exist.
3. Check continuity between RAS motor relay harness connector B139 and ground.
2 - Ground: Continuity exist.
OK or NG
OK >> GO TO 4.
NG >> RAS motor relay harness open or shorted. Repair or replace applicable malfunctioning harness.
4. CHECK RAS MOTOR RELAY RESISTANCE





Check the resistance between RAS motor relay connector.
Terminal 1 - 2: Approximately 74 Ohms
OK or NG
OK >> GO TO 5.
NG >> RAS motor relay malfunction (replacement)
5. CHECK RAS CONTROL UNIT OUTPUT SIGNAL





1. Connect RAS control unit harness connector B136 and RAS motor relay harness connector B139.
2. Check voltage between RAS motor relay harness connector B139 and ground.
1 - Ground
Ignition switch ON: Battery voltage (Approximately 12 Volts)
Ignition switch OFF: Approximately 0 Volts
OK or NG
OK >> Check RAS motor relay separately from other parts.
NG >> RAS control unit malfunction (replacement)