[AW, KJ] This procedure comes from the factory shop manual, and puts the air conditioning into a self-test mode where it tells you if any sensors or actuators are broken:
Mode | Open or shorted in-car temp sensor |
Mode, Defrost Symbol | Open or shorted ambient temp sensor |
Mode, Horizontal Arrow | Open or shorted sunlight sensor |
Mode, Down Arrow | Open or shorted coolant temperature sensor |
Mode, Human Figure | Open or shorted evaporator temperature sensor |
A/C | Open or shorted air mix control motor or stuck air mix door |
A/C, On | Open position signal circuit for mode control motor or mode door stuck |
A/C, Off | Open position signal circuit for re-circulate control motor |
LED on Defrost button | Open or shorted circuit for vent control motor or stuck vent control door |
Functional check (if you don’t know exactly what’s working or not):
The unit will cycle through the following stages, one stage each 5 seconds:
This will tell you if the doors and mode switches are working OK.
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