Test Step 3

Testing temperature sensor for heat exchanger and connecting lines 6 and 9






Heat exchanger






Wiring diagram for test step 3 with adaptor:
3 Temperature dial
4 Pushbutton switch unit
a Defrosting
b Overall ventilation
c Normal setting (air conditioning on)
d EC (air conditioning off)
e Off
6 Temperature sensor for heat exchanger
7 In-car temperature sensor
9 Electronic switchgear for temperature control