Chery QQ Service Manual
1、principle of operation:
When startup a car, the ignition cell (+)12V will supply power to ECU, duty relay
and the main relay coil respectively, the duty relay closes and ECU makes the main
relay close after receiving the ignition signal.
+12V from the duty relay switch is divided into two lines. One line supplies power to
defroster via F15(15A) to the back defrosting switch and grounds by connecting the
back defrosting switch indicator. When the defrosting switch is on the back defroster
will work normally. Connects the switch of the air blower and select different gear,
the air blower will work at that gear. When close the air blower switch and the A/C
switch singnal will be sent to ECU, then the air conditioner relay operates after the
ECU receiving the signal and now the compressor works normally.
Chery Automobile Co.,Ltd
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