Chery QQ - Inspection and Repair of BCM Computer (Antitheft Computer) Circuit; Check of BCM Computer (Antitheft Computer) Circuit

Chery QQ Service Manual BCM Computer Control System
3．Inspection and repair of BCM computer (antitheft computer) circuit
Connect the plug on to BCM computer (antitheft computer). As shown in the figure
above, check each circuit terminal, with the result as tabulated below.
Figure Check of BCM Computer (antitheft computer) Circuit
Connection
Check
Condition Standard Value
Ignition switch “ON”, power window switch
“UP”
Power supply voltage
A1-Grounding
Ignition switch “ON”, power window switch
“DOWN”
Conducting
Ignition switch “ON” Power supply voltage
A2-Grounding
Ignition switch “Off” Nonconducting
Ignition switch starts the motor, and makes it
work
Power supply
voltage
A3-Grounding
Ignition switch starts the motor but fails Nonconducting
Unlock door with key Conducting
A4-Grounding
Lock door with key Nonconducting
A5-Grounding Normal Power supply voltage
A6-Grounding
Normal Power supply
voltage
A7-Grounding Normal Power supply voltage
A8-Grounding Normal Grounding
A9-Grounding Normal Grounding
Antitheft works Power supply
voltage
A10-Grounding
Antitheft fails Nonconducting
Central control lock “OFF” Power supply
voltage
A11-Grounding
Central control lock “ON” Conducting
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