Inspection of A/C Controller and its Circuits

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

A/C controller (1) and its circuits can be checked at A/C controller wiring couplers by measuring voltage.

Fig 1: Locating A/C Controller

Courtesy of SUZUKI OF AMERICA CORP.

CAUTION: A/C controller cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter to A/C controller and ECM with couplers disconnected from it.

Voltage Check

Remove A/C controller (1) from vehicle referring to "A/C CONTROLLER REMOVAL AND INSTALLATION: ".
Remove ECM (2) from vehicle.
Connect A/C controller couplers to A/C controller (1) and connect ECM couplers to ECM.
Check each terminal voltage with couplers connected by referring to Fig 6 .
NOTE: For "Fig. A", "Fig. B", "Fig. C" in the figure, refer to Fig 6 .

Fig 2: Checking A/C Controller Voltage
Courtesy of SUZUKI OF AMERICA CORP.