Seat Heater System

SEAT: SEAT HEATER SYSTEM: ON-VEHICLE INSPECTION

1. INSPECT SEAT HEATER CIRCUIT

(a) Disconnect the connector from the seat heater controller.





(b) Measure the voltage according to the value(s) in the table below.

Voltage:

Driver side
Front passenger side










If the voltage is not as specified, repair or replace the wire harness or connector.

(c) Measure the resistance according to the value(s) in the table below.

Resistance:

Driver side
Front passenger side










HINT
*1: Conditions vary with the seat heater switch position.

If the resistance is not as specified, repair or replace the wire harness or connector.

2. INSPECT SEAT HEATER SWITCH CIRCUIT

(a) Disconnect the seat heater switch connector.





(b) Measure the voltage according to the value(s) in the table below.

Voltage:





If the voltage is not as specified, repair or replace the wire harness or connector.

(c) Measure the resistance according to the value(s) in the table below.

Resistance:





If the resistance is not as specified, repair or replace the wire harness or connector.

3. INSPECT FRONT SEAT ASSEMBLY LH

(a) Disconnect the seat ventilator connectors.





(b) Measure the resistance according to the value(s) in the table below.

Resistance:

Driver side
Front passenger side










If the continuity is not as specified, repair or replace the wire harness or connector.

(c) Measure the voltage according to the value(s) in the table below.

Voltage:

Driver side
Front passenger side










If the voltage is not as specified, repair or replace the wire harness or connector.

(d) Measure the voltage according to the value(s) in the table below.

Voltage:

Driver side
Front passenger side










If the voltage is not as specified, inspect the seat ventilator/heater switch (heater control housing) and wire harness or connector according to the problem symptoms table Symptom Related Diagnostic Procedures.

(1) *1: Waveform





HINT
Waveform varies with the blower level.