Sienna V6-3.0L (1MZ-FE) (2003)
Heated Glass Element Switch: Testing and Inspection
Manual Air Conditioning:
INSPECT DEFOGGER SWITCH CONTINUITY
Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 8, check that the indicator light light up.
If operation is not as specified, replace the switch.
Manual Air Conditioning:
INSPECT DEFOGGER SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown in the chart.
If the circuit is as specified, replace the switch.