9-5 Aero (9600) L4-2.3L Turbo (2.3HOT) (2004)
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The inductive sensor works like a small alternator, the sine-wave voltage of which increases with increasing wheel speed. The sine-wave voltage
alternates between positive and negative polarity, which is achieved by alternate teeth and gaps on the toothed wheel.
By measuring the frequency, the control module can determine the speed of each wheel.
A wheel speed of 20 km/h (12.5 mph) will give approximately 2 V AC 70 Hz
The ESP control module uses information on wheel speed to calculate the speed of the wheels in relation to each other. If the difference exceeds the
limits, the control module will compensate for this by requesting braking and/or a change in engine torque.
Diagnostics
If there is a break or short circuit in the front left circuit, diagnostic trouble code C1372 will be set. The TCS and ABS functions will be disabled and
the warning lamps for ABS, brakes and TCS OFF will light up as well as the central warning lamp.
In the event of a mechanical fault or malfunction in the front left circuit, diagnostic trouble code C1371 will be set. The TCS and ABS functions will
be disabled and the warning lamps for ABS, brakes and TCS OFF will light up as well as the central warning lamp.
If there is a break or short circuit in the front right circuit, diagnostic trouble code C1377 will be set. The TCS and ABS functions will be disabled and
the warning lamps for ABS, brakes and TCS OFF will light up as well as the central warning lamp.
In the event of a mechanical fault or malfunction in the front right circuit, diagnostic trouble code C1376 will be set. The TCS and ABS functions will
be disabled and the warning lamps for ABS, brakes and TCS OFF will light up as well as the central warning lamp.
Rear Wheel Sensors
Rear-wheel sensors
