Seat Temperature Element: Testing and Inspection

SEAT HEATER SYSTEM

INSPECTION



2. SEAT HEATER UNIT
Disconnect the seat heater unit connector, and check the continuity between terminals of connector.






If no continuity exists, replace the seat heater unit with a new part.

3. SEAT HEATER SWITCH

- CHECK THERMISTOR OUTPUT VOLTAGE

1. Connect the battery to the connector.
Connector terminals No. 2 (+):
2. Measure the voltage between connector and chassis ground.

Connector & terminal:
LHD side seat
(R43) No. 4 (+) - Chassis ground (-):

RHD side seat
(R42) No. 4 (+) - If voltage is not 1.5 V or more, replace the seat heater switch.

- CHECK SWITCH OUTPUT VOLTAGE

1. Connect the battery to the connector. Connector terminals No. 2 (+):
2. Measure the voltage between connector and chassis ground while turning the switch to ON.

Connector & terminal:
LHD side seat
(R43) No. 3 (+) - Chassis ground (-):

RHD side seat
(R42) No. 3 (+) - Chassis ground (-):

If voltage does not change from 10 V or more to zero, replace the seat heater switch.