With Rear Active Steer

POWER SUPPLY AND GROUND CIRCUIT


Description

Supplies power to RAS control unit.




POWER SUPPLY AND GROUND CIRCUIT


Diagnosis Procedure

1.CHECK RAS CONTROL UNIT POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect RAS control unit harness connector.
3. Check the voltage between RAS control unit harness connectors and ground.





4. Turn the ignition switch ON.

CAUTION:
Never start the engine.
5. Check the voltage between RAS control unit harness connectors and the ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Check the following items. Repair or replace the malfunctioning parts.
- 10A fuse (#45) open
- Short among 10A fuse (#45) connector, RAS control unit harness connector No. 27 terminal and the ground
- Open between the ignition switch and RAS control unit harness connector No. 27 terminal
- Ignition switch
2.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (1)
1. Turn the ignition switch OFF.
2. Remove RAS motor relay.
3. Check the continuity between RAS motor relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace the harnesses and connectors.
3.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (2)
Check the voltage between RAS motor relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Check the following items. Repair or replace the malfunctioning parts.
- 20A fuse (#37) open
- Short among 20A fuse (#37) connector, RAS motor relay harness connector No. 3 terminal and the ground
- Open between the battery and RAS motor relay harness connector No. 3 terminal
4.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (3)
1. Remove the noise suppressor.
2. Check the continuity between the noise suppressor harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace the harnesses and connectors.
5.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (4)
1. Connect RAS control unit harness connector.
2. Turn the ignition switch ON.

CAUTION:
Never start the engine.
3. Check the voltage between RAS control unit harness connector and ground.





4. Turn the ignition switch OFF.
Is the inspection result normal?
YES - GO TO 6.
NO - Replace RAS control unit. Refer to Exploded View.
6.CHECK RAS MOTOR RELAY
1. Apply 12 V to RAS motor relay connector No. 1 terminal and No. 2 terminal.

CAUTION:
- Never make the terminals short.
- Connect the fuse between the terminals when applying the voltage.
2. Check the continuity between RAS motor relay connector terminals.





3. Check the resistance between RAS motor relay connector terminals.





Is the inspection result normal?
YES - GO TO 7.
NO - Replace RAS motor relay.
7.CHECK NOISE SUPPRESSOR
Check continuity between the noise suppressor connector terminals.





Is the inspection result normal?
YES - GO TO 8.
NO - Replace the noise suppressor.
8.CHECK RAS MOTOR POWER SUPPLY
1. Connect RAS control unit harness connector.
2. Install RAS motor relay.
3. Install the noise suppressor.
4. Turn the ignition switch ON.

CAUTION:
Never start the engine.
5. Check the voltage between RAS control unit harness connectors and ground.





Is the inspection result normal?
YES - INSPECTION END.
NO - Replace RAS control unit. Refer to Exploded View.