DSA Signal Description
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
All the values given below are between the terminal in column 1 and terminal 9 (ground), unless otherwise indicated in brackets.
DSA control module terminals 1 - 16 correspond to terminals 31 - 46 on the breakout box.
NOTE:
It is important to connect the breakout box and check the ground terminal before taking readings.
| U= | DC voltage in volts (V) | f = | frequency in Hertz (Hz) | - | - |
| Ubat= | battery voltage | % duty = | duty cycle (pulse ratio) as a percentage (%) | - | - |
| Ulow = | voltage approximately 0 V | - | - | - | - |
| Terminal | Signal type | Ignition on | Engine idling | Other | Parameter read off |
|---|---|---|---|---|---|
| #1 | Power supply (from the ignition switch) |
Ubat | - | - | |
| #2 | Signal, wheel speed left front wheel (from the ABS control module) | U ≈ 0 V - Ubat depending on the position of the wheel. The frequency (f) increases with the speed of the wheel. |
A pulsed signal (0 V - Ubat with a fixed pulse ratio (% duty ≈ 50%). | - | |
| #3 | Signal, wheel speed right front wheel (from the ABS control module) | U ≈ 0 V - Ubat depending on the position of the wheel. The frequency (f) increases with the speed of the wheel. |
A pulsed signal (0 V - Ubat with a fixed pulse ratio (% duty ≈ 50 %). | - | |
| #4 | Signal, wheel speed left rear wheel (from the ABS control module) | U ≈ 0 V - Ubat depending on the position of the wheel. The frequency (f) increases with the speed of the wheel. |
A pulsed signal (0 V - Ubat with a fixed pulse ratio (% duty ≈ 50%). | - | |
| #5 | Signal, throttle position (TP) sensor (from the engine control module (ECM)) |
%duty ≈ 15 % at closed throttle position (CTP) (idling). f ≈ 50 Hz |
Pulsed signal (0 V - Ubat) with fixed frequency and variable pulse ratio (% duty). Pulse ratio (%duty) increases with increased throttle. |
3 | |
| #6 | Signal, DSA switch | Switch unaffected: U ≈ 0 - 3 V below Ubat Switch affected: U ≈Ulow |
The signal is grounded when the switch is pressed. | 8 | |
| #7 | Signal, stop (brake) light switch | Open: U ≈Ulow Closed: U = 0 - 1.5 V below Ubat |
Stop (brake) light switch closes when braking and the control module receives a signal. | 11 | |
| #8 | - | - | - | - | |
| #9 | Ground (for FENIX 5.1 ground via the engine control module (ECM), measured at the battery negative terminal) | Ulow | - | - | |
| #10 | - | - | - | - | |
| #11 | - | - | - | - | |
| #12 | Signal, wheel speed right rear wheel (from the ABS control module) | U ≈ 0 V - Ubat depending on the position of the wheel. The frequency (f) increases with the speed of the wheel. |
A pulsed signal (0 V - Ubat with a fixed pulse ratio (% duty ≈ 50 %). | - | |
| #13 | Signal, load (TQ) (from the engine control module (ECM)) |
U ≈Ulow | f ≈ 33 Hz | Pulsed signal (0 V - Ubat) with variable frequency and pulse ratio (% duty). The frequency increases with engine speed (RPM), the pulse ratio (%duty) increases with load. |
- |
| #14 | Diagnostic lead | U = 1 - 4 V below Ubat Other values apply if the fault-tracing instrument is connected to the data link connector (DLC). |
- | - | |
| #15 | Signal, request for torque limiting (to the engine control module (ECM)) |
f ≈ 200 Hz | Pulsed signal (0 - 5 V) with fixed frequency and variable pulse ratio (% duty). | - | |
| #16 | Control signal, DSA warning lamp | Lamp lit: U =0-0.5 V Lamp not lit: Ubat |
- | 9, 10 | |