Power Supply And Ground Circuit

POWER SUPPLY AND GROUND CIRCUIT

CLIMATE CONTROLLED SEAT CONTROL UNIT : Diagnosis Procedure

Regarding Wiring Diagram information, Climate Controlled Seat.

1. CHECK FUSES

Check for blown fuses.





Is the inspection result normal?
YES- GO TO 2.
NO- If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse or fusible link.

2. CHECK BATTERY POWER SUPPLY CIRCUIT






1.Turn ignition switch OFF.
2.Disconnect climate controlled seat control unit connector B217.
3.Check voltage between climate controlled seat control unit connector B217 terminal 29 and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 6.

3. CHECK IGNITION POWER SUPPLY CIRCUIT






1.Disconnect climate controlled seat control unit connector B216.
2.Check voltage between climate controlled seat control unit connector B216 terminal 21 and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 5.

4. CHECK GROUND CIRCUIT






1.Turn ignition switch OFF.
2.Check continuity between climate controlled seat control unit connector B217 terminal 30 and ground.





Is the inspection result normal?
YES- Inspection End.
NO- Repair the harness or connectors.

5. CHECK CLIMATE CONTROLLED SEAT RELAY

Perform the climate controlled seat relay component inspection. .
Is the inspection result normal?
YES- GO TO 8.
NO- Replace the climate controlled seat relay.

6. CHECK CIRCUIT BREAKER POWER SUPPLY CIRCUIT






1.Disconnect the circuit breaker connector M84.
2.Check voltage between circuit breaker connector M84 terminal 1
and ground.





Is the inspection result normal?
YES- GO TO 7.
NO- Repair the harness or connectors.

7. CHECK BATTERY POWER SUPPLY CIRCUIT FOR OPEN






Check continuity between circuit breaker connector M84 (A) terminal
2 and climate controlled seat control unit connector B217 (B) terminal 29.





Is the inspection result normal?
YES- Replace the circuit breaker.
NO- Repair the harness or connectors.

8. CHECK CLIMATE CONTROLLED SEAT RELAY BATTERY POWER SUPPLY CIRCUIT






1.Disconnect climate controlled seat relay connector.
2.Check voltage between climate controlled seat relay connector
M58 terminal 3 and ground.





Is the inspection result normal?
YES- GO TO 9.
NO- Repair the harness or connectors.

9. CHECK CLIMATE CONTROLLED SEAT RELAY IGNITION POWER SUPPLY CIRCUIT






Check voltage between climate controlled seat relay connector M58
terminal 2 and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair the harness or connectors.

10. CHECK IGNITION POWER SUPPLY CIRCUIT FOR OPEN






Check continuity between climate controlled seat relay connector
M58 (A) terminal 5 and climate controlled seat control unit connector
B216 (B) terminal 21.





Is the inspection result normal?
YES- GO TO 11.
NO- Repair the harness or connectors.

11. CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT






Check continuity between climate controlled seat relay connector
M58 terminal 1 and ground.





Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Repair the harness or connectors.


CLIMATE CONTROLLED SEAT CONTROL UNIT : Component Inspection (Climate Controlled Seat Relay)


1. CHECK CLIMATE CONTROLLED SEAT RELAY






1.Apply battery voltage between terminals 2 and 1 of the climate controlled seat relay.

CAUTION:
Connect a fuse between the terminals when applying battery voltage.
2.Check continuity between climate controlled seat relay terminals
5 and 3.





Is the inspection result normal?
YES- Inspection End.
NO- Replace climate controlled seat relay.