9-5 (9600) L4-2.3L Turbo (2.3 T) (2006)
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Power ground
The ACC unit is power grounded from G41P to K1 pin 1.
Sensor Ground
All sensors are grounded from separate control module outputs that internally have a common ground via a resistor.
Reference ground
The fan control unit's reference ground is obtained from K1 pin 35.
Diagnostics
If ground is not present, the display will not light up when the ignition is turned on.
If sensor ground is short-circuited to 5 V or B+ then diagnostic trouble code B2945 is generated.
