Component Tests and General Diagnostics

INSPECTION







1. INSPECT SEAT HEATER SWITCH CONTINUITY
If continuity is not as specified, replace the switch or bulb.




2. INSPECT SEAT HEATER SWITCH INDICATOR
a. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 6.
b. Push the switches "HI" position, check that the indicator of "HI" position lights up.
c. Push the switches "LO" position, check that the indicator of "LO" position lights up.
If operation is not as specified, replace the switch and inspect the circuits connected to other parts.







3. INSPECT SEAT HEATER SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.







4. INSPECT SEAT HEATER CUSHION CONTINUITY
a. Disconnect the seat back heater from the seat cushion heater
b. Heat the thermostat with a light.
c. Inspect the seat cushion heater continuity between terminals as shown.







If continuity is not as specified, replace the seat cushion hearer.

5. INSPECT SEAT HEATER CUSHION CONTINUITY
Inspect the seat heater inner cushion and front cushion continuity between terminals, as shown.
If continuity is not as specified, replace the seat cushion heater.







6. INSPECT SEAT BACK CONTINUITY
Inspect the seat back continuity between terminals, as shown.
If continuity is not as specified, replace the seat back heater.