Signal specification, ABS / DSTC (dynamic stability and traction control) control module
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
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 | - |