Diagnosis Procedure

HEAT SENSOR

PASSENGER SIDE : Diagnosis Procedure


1. CHECK HEAT SENSOR INPUT SIGNAL

1.Turn ignition switch ON.
2.Check voltage between heated seat control unit harness connector and ground.





NOTE:
Voltage is repeated within the value shown as per the following list depending on heater unit temperature.
Is the inspection result normal?
YES- heat sensor is OK.
NO- GO TO 2.

2. CHECK HEAT SENSOR CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect heated seat control unit connector and seat cushion heater connector.
3.Check continuity between heated seat control unit harness connector and seat cushion heater harness connector.





4.Check continuity between heated seat control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness.

3. CHECK HEAT SENSOR POWER SUPPLY

1.Turn ignition switch ON.
2.Turn heated seat switch ON.
3.Check voltage between seat cushion heater harness connector and ground.





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

4. CHECK HEAT SENSOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect heated seat switch connector.
3.Check continuity between heated seat control unit harness connector and seat cushion heater harness connector.





4.Check continuity between heated seat control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace harness.

5. CHECK HEAT SENSOR

Check heat sensor. Refer to "PASSENGER SIDE : Component Inspection" Component Inspection.
Is the inspection result normal?
YES- GO TO 6.
NO- Replace seat cushion heater. Refer to "Exploded View" Exploded View.

6. CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Refer to "Intermittent Incident" Intermittent Incident
- INSPECTION END