9-5 Sport Wagon (9600) L4-2.3L Turbo (B235) (2003)
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Power Ground
The ACC unit is power grounded on pin 1 from G41P.
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 pin 35.
Diagnostics
If ground is not present, the display will not light up when the ignition is turned on.
If the sensor ground is shorted to 5 V or B+, diagnostic trouble code B2945 is generated and 23 is displayed instead of right-hand temperature when
calibrating.
