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Signal specification, ABS/DSTC (dynamic stability and traction control) control module

All the values given are between the relevant terminal in column 1 and terminals #A15 or #A46 (ground), unless otherwise indicated in brackets.

NOTE: It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
- U= DC voltage in volts (V) Ubat = battery voltage (V) -
- I = current in amperes (A) Ulow = voltage approximately 0 V -
- f = Frequency in Hertz (Hz) - - -
Breakout box terminal  Control module terminal  Signal type  Ignition on  Other 
#A1 #1 Pressure build-up valve signal Pulse width modulated signal
I=Max 4 A
F=18 kHz		 -
#A2 #2 - - -
#A3 #3 Front right wheel sensor signal Tooth against sensor: I≈14 mA U≈9 V
Cover against sensor: I≈ 7 mA U≈ 10 V
(at normal system voltage)		 The wheel sensors generate a current for the control module. When the pulse wheel rotates, the sensor generates a pulsed current (quadratic wave) where the strength of the current depends on the position of the pulse wheel. The frequency increases with speed.
#A4 #4 Power supply, rear right wheel sensor U = Ubat The wheel sensor receives 12 V from the control module.
#A5 #5 - - -
#A6 #6 Power supply, rear right wheel sensor U = Ubat The wheel sensor receives 12 V from the control module.
#A7 #7 Rear right wheel sensor signal Tooth against sensor: I≈14 mA U≈9 V
Cover against sensor: I≈7 mA U≈10 V
(at normal system voltage)		 The wheel sensors generate a current for the control module. When the pulse wheel rotates, the sensor generates a pulsed current (quadratic wave) where the strength of the current depends on the position of the pulse wheel. The frequency increases with speed.
#A8 #8 - - -
#A9 #9 Signal ground, lateral acceleration sensor U≈Ulow -
#A10 #10 Brake pressure sensor 2 signal Sensitivity:
230 mV/kPa (23 mV/bar)
Operating range:
0-17 MPa (0-170 bar)
(0.25 V-4.75 V)
Not pressured: 0.5 V		 -
#A11 #11 Signal ground, yaw rate sensor 1 U≈Ulow -
#A12 #12 Brake pressure sensor 1 signal Sensitivity:
230 mV/kPa (23 mV/bar)
Operating range:
0-17 MPa (0-170 bar)
(0.25 V-4.75 V)
Not pressured: 0.5 V		 -
#A13 #13 Pedal pressure sensor signal Brake pedal released:
U≈12 V DC
Brake pedal released:
F=142.8 Hz		 The signal is measured to terminal #15. The control module transmits a pulsed test signal between 0 and 12 V to check the circuit. The terminal is tested when the brake pedal is depressed.
#A14 #14 Yaw rate sensor 2 signal Sensitivity:
27.0 mV/°/s
Operating range:
+75°/s - -75°/s (0.475 V-4.525 V)
0° = 2.5 V
Left turn: >2.50 V
Right turn: <2.50 V		 -
#A15 #15 Power and signal ground (measured to battery negative terminal) U≈Ulow -
#A16 #16 30-supply inlet and outlet valves (power supply from the battery to the intake and exhaust valves) U≈Ubat Power supply to the in and outlet valves and signal to the control module.
#A17 #17 Supply voltage pressure build-up valve U=4.75-5.25 V -
#A18 #18 - - -
#A19 #19 Control modules communication cable (CAN H) U=2-3 V -
#A20 #20 Control modules communication cable (CAN L) U=2-3 V -
#A21 #21 - - -
#A22 #22 - - -
#A23 #23 Stop lamp switch signal Open: U≈Ulow
Closed: U≈Ubat		 The stop lamp switch closes when braking.
#A24 #24 - - -
#A25 #25 Lateral acceleration sensor supply voltage U=4.75-5.25 V -
#A26 #26 Brake pressure sensor 2 signal ground U≈Ulow -
#A27 #27 Yaw rate sensor 2 power supply U=4.75-5.25 V -
#A28 #28 Brake pressure sensor 1 signal ground U≈Ulow -
#A29 #29 Pedal pressure sensor signal Brake pedal released:
F=142.8 Hz
Brake pedal released:
U≈12 V DC		 The signal is measured to terminal #15. The control module transmits a pulsed test signal between 0 and 12 V to check the circuit. The terminal is tested when the brake pedal is unaffected.
#A30 #30 Signal ground, yaw rate sensor 2 U≈Ulow -
#A31 #31 - - -
#A32 #32 Voltage reading pedal pressure sensor U≈Ubat -
#A33 #33 Front left wheel sensor signal Tooth against sensor: I≈14 mA U≈9 V
Cover against sensor: I≈7 mA U≈10 V
(at normal system voltage)		 The wheel sensors generate a current for the control module. When the pulse wheel rotates, the sensor generates a pulsed current (quadratic wave) where the strength of the current depends on the position of the pulse wheel. The frequency increases with speed.
#A34 #34 Front left wheel sensor power supply U = Ubat The wheel sensor receives 12 V from the control module.
#A35 #35 - - -
#A36 #36 Rear left wheel sensor power supply U = Ubat The wheel sensor receives 12 V from the control module.
#A37 #37 Rear left wheel sensor signal Tooth against sensor: I≈14 mA U≈9 V
Cover against sensor: I≈7 mA U≈10 V
(at normal system voltage)		 The wheel sensors generate a current for the control module. When the pulse wheel rotates, the sensor generates a pulsed current (quadratic wave) where the strength of the current depends on the position of the pulse wheel. The frequency increases with speed.
#A38 #38 - - -
#A39 #39 - - -
#A40 #40 Lateral acceleration sensor signal Sensitivity: 1.2 V/g
Operating range: -1.7g - +1.7g
(-1.7g = 4.75 V)
(+1.7g = 0.25 V)
(0g = 2.5 V)
Left turn: <2.50 V
Right turn: >2.50 V		 -
#A41 #41 Brake pressure sensor 2 power supply U=4.75-5.25 V -
#A42 #42 Yaw rate sensor 1 signal Sensitivity:
27.0 mV/°/s
Operating range: +75°/s - -75°/s
(0.475 V-4.525 V)
(0° = 2.5 V)
Left turn: <2.50 V
Right turn: >2.50 V		 -
#A43 #43 Brake pressure sensor 1 power supply U=4.75-5.25 V -
#A44 #44 15-supply (power supply from the ignition switch) U = Ubat -
#A45 #45 Yaw rate sensor 1 power supply U=4.75-5.25 V -
#A46 #46 Power and signal ground U = Ulow -
#A47 #47 30-supply pump motor (power supply from the battery) U = Ubat -
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