Seat Heater System: Inspection
- INSPECT SEAT HEATER SWITCH CONTINUITY SPECIFIED CONDITION
Condition tester connection Specified condition OFF - No continuity ON (Left) 12 - 14 Continuity ON (Right) 14 - 16 Continuity If continuity is not as specified replace the switch or bulb.
- INSPECT REAR SEAT HEATER SWITCH VOLTAGE
(): Right side
- Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead terminal 8.
- Push the switch and check the voltage between terminal 5 (7) and battery H terminal.
If operation is not as specified, replace the switch.
- INSPECT SEAT HEATER SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on the wire harness side, as shown.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
SPECIFIED CONDITIONTester connection to terminal number Condition Specified condition 6 - Ground Constant Continuity 14 - Ground Ignition switch turned to ON Battery positive voltage - Seat Cushion: INSPECT SEAT HEATER CONTINUITY
- Heat the thermostat with a light.
- Inspect the seat heater continuity between terminals.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
SPECIFIED CONDITIONTester connection Condition Specified condition A2 - B3 Constant Continuity A1 - B1 Seat heater temperature bellow 25°C (77°F) Continuity B1 - B2 Seat heater temperature bellow 25°C (77°F) Continuity A1 - B2 Seat heater temperature bellow 25°C (77°F) Continuity A1 - B1 Seat heater temperature above 55°C (131°F) No continuity B1 - B2 Seat heater temperature above 45°C (113°F) No continuity A1 - B2 Seat heater temperature above 45°C (113°F) No continuity If continuity is not as specified, replace the seat cushion pad.
- Seat Back: INSPECT SEAT HEATER CONTINUITY
Inspect the seat heater continuity between terminals, as shown.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
SPECIFIED CONDITIONTester connection Condition Specified condition 1 - 3 Constant Continuity 2 - 3 Constant Continuity If continuity is not as specified, replace the seat back pad.