GSIC - Global Service Information Center

# AIR CONDITIONING SWITCH > INSPECTION

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1. INSPECT A/C SWITCH

1. Using an electrical tester, check if the diodes are functioning normally.

   HINT:
   1. As the switch has diodes, resistance inspection cannot be performed. Use the tester's diodes check function to check the diodes.
   2. Connect the tester's leads as shown in the table below. If the leads are not connected correctly, the readings will not be accurate. Connect the tester's positive (+) lead to the diode's positive (+) side, and the negative (-) lead to the diode's negative (-) side.

   1. Set the function selector switch to diode check function mode, and check that the diodes are functioning normally.

      Reference voltage (diode check function mode):

        Tester Connection | Switch Condition | Specified Condition
        Positive (+) side → Terminal 6 Negative (-) side → Terminal 5 | ON | 0.4 to 0.8 V
        OFF | Same as initial value*

      HINT:
        *: The initial value is the voltage displayed when the tester is in diode check function mode and the tester's leads are not connected.

1. Apply battery voltage to the switch connector and check that the indicator light illuminates.

   OK:

     Measurement Connection | Switch Condition | Specified Condition
     Battery positive (+) → Terminal 6 Battery negative (-) → Terminal 4 | ON | Indicator light illuminates
     OFF | Indicator light does not illuminate

   HINT:
     When the battery's negative (-) lead is applied to terminal 6and the positive (+) lead is applied to terminal 4, the indicator light does not illuminate.

1. Apply battery voltage to the switch connector and check that the illumination light illuminates.

   OK:

     Measurement Connection | Specified Condition
     Battery positive (+) → Terminal 3 Battery negative (-) → Terminal 1 | Illumination light illuminates

   If the result is not as specified, replace the bulb or switch.