A/C Switch and Defroster Switch in Heater Controller Inspection

WARNING: This page is about a different car, the 2004 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.

Press A/C switch (1) and check if there is continuity between terminals "a" and "b".
Connect battery positive terminal to terminal "c" and negative terminal to terminal "a", and then press A/C switch (1) and check if indicator lamp lights.
Inspect for poor connection at A/C terminal of the heater controller referring to HEATER CONTROLLER INSPECTION .
Turn air flow selector (2) to defroster position and check if there is continuity between "a" and "d" terminals, "e" and "f" terminals.

Fig 1: Checking A/C Switch And Defroster Switch

Courtesy of SUZUKI OF AMERICA CORP.