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 2 and the negative (-) lead to terminal 4.
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 CUSHION CONTINUITY
a. Check that continuity exists between terminal 1 of the connector "A" and terminal 3 of the connector "B".
b. Heat the 2 thermostats with light. Check that no continuity exists above 36 - 44 °C (97 - 111 °F) between terminal 1 of the connector "A" and terminal 3 of the connector "B".
c. Heat the 2 thermostats with light. Check that there is no continuity above 46 - 54 °C (115 - 129 °F) between terminal 2 of the connector "A" and terminal 1 of the connector "B".

d. Cool the 2 thermostats below 25 - 35 °C (77 - 95 °F). Check that continuity exists between terminal 1 of the connector "A" and terminal 3 of the connector "B", and terminal 2 of the connector "A" and terminal 1 of the connector "B".




5. INSPECT SEAT BACK CONTINUITY
Check that continuity exists between terminals 1 and 2, 1 and 3.
If continuity is not as specified, replace the seat back pad.