Seat Temperature Element: Testing and Inspection

INSPECTION

HEATED SEAT SWITCH CHECK

CONTINUITY TEST OF HEATED SEAT SWITCH





1. Check for continuity between terminals.





2. Check that the indicator is lighted at HI or LO when battery voltage is supplied to terminal 5 and terminal 8 is grounded.
3. Check that indicator is lighted when battery voltage is supplied to terminals 2 and terminal 6.
NOTE:
() indicates positive or negative terminal of tester. Measuring at the opposite sides may cause open circuit.

SEAT CUSHION HEATER CHECK





Measure the resistance between terminals.
Standard value: At room temperature 20° C (68° F)
Between terminals 2 and terminal 3: Approximately 3.98 ohms± 5%
Between terminals 1 and terminal 3:3.98 ohms± 5%
NOTE:
When the interior temperature rises 1°C (34°F), a measurement standard value increases 0.031 ohms. And when the interior temperature drops 1°C (34°F), a measurement standard value decreases 0.031 ohms.

SEATBACK HEATER CHECK





Measure the resistance between terminals.
Standard value: At room temperature 20° C (68° F)
Approximately 4.51 ohms± 5%
NOTE:
When the interior temperature rises 1°C (34°F), a measurement standard value increases 0.031 ohms. And when the interior temperature drops 1°C (34°F), a measurement standard value decreases 0.031 ohms.

HEATED SEAT RELAY CONTINUITY CHECK





1. Remove the instrument lower cover.
2. Remove the junction block mounting and slide the junction block to check the heated seat.






POWER SEAT SWITCH CONTINUITY CHECK










OPERATION CHECK OF POWER SEAT MOTOR





1. Disconnect the connector of each motor.
2. Check that when the battery is directly connected to the motor terminal, the motor turns smoothly and each adjusting mechanism operates as stated below for each motor:
(1) Connect the battery power supply to the terminal 2 and ground the terminal 1, front slide side.
(2) Connect the battery power supply to the terminal 1 and ground the terminal 2, rear slide side.
(3) Connect the battery power supply to the terminal 3 and ground the terminal 2 for the front height down side and connect the battery power supply to the terminal 2 and ground the terminal 3 for the front height up side.
(4) Connect the battery power supply to the terminal 4 and ground the terminal 3 for the rear height up side and connect the battery power supply to the terminal 3 and ground the terminal 4 for the rear height down side.
3. If abnormality was found, check the power seat adjuster assembly.