C1912
Inspection 2: Motor Power Supply System1. 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.
2. Check voltage between RAS motor relay harness connector and ground.
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 and RAS control unit harness connector.
2. Check continuity between the following terminals.
- RAS motor relay harness connector B139 terminal 5 and RAS control unit harness connector B136 terminal 37.
- RAS motor relay harness connector B139 terminal 1 and RAS control unit harness connector B136 terminal 25.
- RAS motor relay harness connector B139 terminal 2 and ground.
Continuity should 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.
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 and RAS motor relay harness connector.
2. Check voltage between RAS motor relay harness connector and ground.
OK or NG
OK >> Check RAS motor relay separately from other parts. Refer to STC-44, "RAS MOTOR RELAY". RAS Motor Relay
NG >> RAS control unit malfunction (replacement)