Component Tests and General Diagnostics
SEAT HEATER SYSTEMINSPECTION
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.
With SI-DRIVE Connector terminals No. 12 (+):
Without SI-DRIVE Connector terminals No. 11 (+):
2. Measure the voltage between connector and chassis ground.
Connector & terminal:
With SI-DRIVE
LHD side seat (C2) No. 8 (+) - Chassis ground (-):
RHD side seat (C2) No. 6 (+) - Chassis ground (-):
Without SI-DRIVE
LHD side seat (C2) No. 2 (+) - Chassis ground (-):
RHD side seat (C2) No. 4 (+) - Chassis ground (-):
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.
With SI-DRIVE Connector terminals No. 12 (+):
Without SI-DRIVE Connector terminals No. 11 (+):
2. Measure the voltage between connector and chassis ground when turning the switch to other than OFF position.
Connector & terminal:
With SI-DRIVE
LHD side seat (C2) No. 11 (+) - Chassis ground (-):
RHD side seat (C2) No. 10 (+) - Chassis ground (-):
Without SI-DRIVE
LHD side seat (C2) No. 10 (+) - Chassis ground (-):
RHD side seat (C2) No. 5 (+) - Chassis ground (-):
If voltage does not change from 10 V or more to zero, replace the seat heater switch.