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: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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 | Uapprox.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 | Uapprox.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: Uapprox.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) | Uapprox.Ulow | |
| #A16 | #16 | 30-supply inlet and outlet valves (power supply from the battery to the intake and exhaust valves) | Uapprox.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: Uapprox.Ulow Closed: Uapprox.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 | Uapprox.Ulow | |
| #A27 | #27 | Yaw rate sensor 2 power supply | U=4.75-5.25 V | |
| #A28 | #28 | Brake pressure sensor 1 signal ground | Uapprox.Ulow | |
| #A29 | #29 | Pedal pressure sensor signal | Brake pedal released: F=142.8 Hz Brake pedal released: Uapprox.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 | Uapprox.Ulow | |
| #A31 | #31 | |||
| #A32 | #32 | Voltage reading pedal pressure sensor | Uapprox.Ubat | |
| #A33 | #33 | Front left wheel sensor signal | Tooth against sensor: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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 |
Signal specification, ABS control module
All values given are between the relevant terminal in column 1 and terminal #A8 or #A24 (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 |
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #A1 | #1 | Front left wheel sensor signal | Tooth against sensor: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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. |
| #A2 | #2 | Front left wheel sensor power supply | U = Ubat | |
| #A3 | #3 | |||
| #A4 | #4 | 15l-supply (power supply from ignition switch) | U = Ubat | |
| #A5 | #5 | Rear left wheel sensor signal | Tooth against sensor: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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. |
| #A6 | #6 | Rear left wheel sensor power supply | U = Ubat | |
| #A7 | #7 | |||
| #A8 | #8 | Power and signal ground (measured to battery negative terminal) | Uapprox.Ulow | |
| #A9 | #9 | 30-supply inlet and outlet valves (power supply from the battery to the intake and exhaust valves) | Uapprox.Ubat | Power supply to the in and outlet valves and signal to the control module. |
| #A10 | #10 | Control modules communication cable (CAN L) | U=2-3V | |
| #A11 | #11 | Control modules communication cable (CAN H) | U=2-3V | |
| #A12 | #12 | |||
| #A13 | #13 | |||
| #A14 | #14 | Stop lamp switch signal (applies only to AWD TRACS) | Open: Uapprox.Ulow Closed: Uapprox.Ubat. | The stop lamp switch closes when braking. |
| #A15 | #15 | |||
| #A16 | #16 | |||
| #A17 | #17 | |||
| #A18 | #18 | Stop lamp switch signal | Open: Uapprox.Ulow Closed: Uapprox.Ubat | The stop lamp switch closes when braking. |
| #A19 | #19 | Front right wheel sensor signal | Tooth against sensor: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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. |
| #A20 | #20 | Power supply, rear right wheel sensor | U = Ubat | |
| #A21 | #21 | |||
| #A22 | #22 | Power supply, rear right wheel sensor | U = Ubat | The wheel sensor receives 12 V from the control module. |
| #A23 | #23 | Rear right wheel sensor signal | Tooth against sensor: Iapprox.14 mA Uapprox.9 V Cover against sensor: Iapprox.7 mA Uapprox.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. |
| #A24 | #24 | Power and signal ground (measured to battery negative terminal) | Uapprox.Ulow | |
| #A25 | #25 | 30-supply pump motor (power supply from the battery) | Uapprox.Ubat |
See also:
• 9511354
• Test driving