Signal specification, ABS 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 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: 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. |
| #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: 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. |
| #A6 | #6 | Rear left wheel sensor power supply | U = Ubat | - |
| #A7 | #7 | - | - | - |
| #A8 | #8 | Power and signal ground (measured to battery negative terminal) | U≈Ulow | - |
| #A9 | #9 | 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. |
| #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: U≈Ulow Closed: U≈Ubat. |
The stop lamp switch closes when braking. |
| #A15 | #15 | - | - | - |
| #A16 | #16 | - | - | - |
| #A17 | #17 | - | - | - |
| #A18 | #18 | Stop lamp switch signal | Open: U≈Ulow Closed: U≈Ubat |
The stop lamp switch closes when braking. |
| #A19 | #19 | 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. |
| #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: 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. |
| #A24 | #24 | Power and signal ground (measured to battery negative terminal) | U≈Ulow | - |
| #A25 | #25 | 30-supply pump motor (power supply from the battery) | U≈Ubat | - |