Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Volvo S60 Base, FWDFACTORY OEM SERVICE PROCEDURE
Signal specification
General
All values given below are between the terminals stated in column 1 and breakout box terminal #B2. Control module terminals #A1-#A60 correspond to terminals #A1-#A60 on the breakout box, terminals #A61-#A70 correspond to terminals #B1-#B10 on the breakout box and terminals #B1-#B50 correspond to terminals #B10-#B60 on the breakout box.
NOTE:
It is important to connect the breakout box and check the ground terminals before taking readings.
HINT: If the numbering of the connector is different from the numbering on the breakout box, the connector number is given first, terminal #A61, followed by the breakout box number in brackets, (terminal #B1). Example: #A61 (#B1).
| U = | DC voltage in volts (V) | U A/C = | AC voltage in volts (V) |
| Ubat = | Battery voltage in volts (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0V | %pulse = | Pulse ratio (%) |
| t = | Time in milliseconds (ms) |
Connector terminals #A1 - #A70
| Terminal | Breakout box | Signal type | Ignition ON | Idle | Other |
|---|---|---|---|---|---|
| #A1 | (#A1) | - | - | - | - |
| #A2 | (#A2) | Control signal Evaporative emission system (EVAP) valve |
U = Ubat | - | PWM signal, during activation of the EVAP canister shut off valve |
| #A3 | (#A3) | - | - | - | - |
| #A4 | (#A4) | Signal (+) Intake temperature sensor (integrated in the mass air flow (MAF) sensor) |
- | (+10°C) U = 2.95V (+20°C) U = 2.38V (+30°C) U = 1.93V (+40°C) U = 1.58V |
- |
| #A5 | (#A5) | - | - | - | - |
| #A6 | (#A6) | - | - | - | - |
| #A7 | (#A7) | Signal to the control module for the engine cooling fan (FC) | Pulse width modulation (PWM) signal Ulow = 1.5V pulse ratio = 10 %-90 % |
- Uhigh = Ubat -1.5V f = 100 Hz |
- |
| #A8 | (#A8) | - | - | - | - |
| #A9 | (#A9) | - | - | - | - |
| #A10 | (#A10) | - | - | - | - |
| #A11 | (#A11) | Control signal preheating rear heated oxygen sensor (HO2S) |
U = Ubat | Preheating off U = Ubat Preheating U = Ulow |
- |
| #A12 | (#A12) | Reset valve camshaft |
Pulse width modulation (PWM) signal Utop = Ubat t = 0.6 ms pulse ratio = 14 % |
Pulse width modulation (PWM) signal Utop = Ubat -1V t = 2ms pulse ratio = 50 % |
The pulse ratio changes with engine speed (RPM) |
| #A13 | (#A13) | - | - | - | - |
| #A14 | (#A14) | Control signal injector 5 |
U = Ubat | t = 2-3 ms | t increases with engine speed (RPM) and load |
| #A15 | (#A15) | Control signal injector 3 |
U = Ubat | tlow = 2-3 ms | t increases with engine speed (RPM) and load |
| #A16 | (#A16) | Control signal injector 1 |
U = Ubat | tlow = 2-3 ms | t increases with engine speed (RPM) and load |
| #A17 | (#A17) | - | - | - | - |
| #A18 | (#A18) | Control signal preheating front heated oxygen sensor (HO2S) |
U = Ubat | Preheating off U = Ubat Preheating U = Ubat |
- |
| #A19 | (#A19) | - | - | - | - |
| #A20 | (#A20) | - | - | - | - |
| #A21 | (#A21) | Signal A/C pressure sensor |
U = 0.9V (at approximately 20°C) | - | U increases with increased pressure in the system |
| #A22 | (#A22) | Mass air flow (MAF) sensor signal | U = 0.58V | U = 1.33V Unloaded, engine at operating temperature |
U increases with increasing air mass |
| #A23 | (#A23) | Signal manifold absolute pressure (MAP) sensor |
U = 3.6V atmospheric pressure at sea level |
- | U increases with pressure in the intake pipe |
| #A24 | (#A24) | Signal (+) Front heated oxygen sensor (HO2S) signal (+) |
- | λ = 0.95V<700 mV λ = 1.10V<200 mV |
- |
| #A25 | (#A25) | - | - | - | - |
| #A26 | (#A26) | - | - | - | - |
| #A27 | (#A27) | - | - | - | - |
| #A28 | (#A28) | Signal ignition discharge module (IDM) check, ignition coils |
- | - | - |
| #A29 | (#A29) | Control signal ignition coil no. 3 |
U = Ulow | U = 2.5V thigh = 2 ms |
The frequency varies according to engine speed (RPM) |
| #A30 | (#A30) | Control signal ignition coil no. 2 |
U = Ulow | U = 2.5V thigh = 2 ms |
The frequency varies according to engine speed (RPM) |
| #A31 | (#A31) | Control signal ignition coil no. 1 |
U = Ulow | U = 2.5V thigh = 2.5 ms |
The frequency varies according to engine speed (RPM) |
| #A32 | (#A32) | - | - | - | - |
| #A33 | (#A33) | Control signal injector 4 |
U = Ubat | tlow = 2-3 ms | t increases with engine speed (RPM) and load |
| #A34 | (#A34) | Control signal injector 2 |
U = Ubat | tlow = 2-3 ms | t increases with engine speed (RPM) and load |
| #A35 | (#A35) | - | - | - | - |
| #A36 | (#A36) | Power ground preheating, front heated oxygen sensor (HO2S) |
U = Ulow | - | - |
| #A37 | (#A37) | Communication cable control modules (CAN H) |
- | - | Between the engine control module (ECM) and the throttle unit |
| #A38 | (#A38) | Control signal stop lamp - switch |
U = Ulow (not activated) U = Uhigh (activated) |
- | Between the engine control module (ECM) and the throttle unit |
| #A39 | (#A39) | Oil pressure switch | U = Ulow (no oil pressure) | U = Ubat | - |
| #A40 | (#A40) | Signal (+) Engine coolant temperature (ECT) sensor |
- | (+20°C) U = 3.1V (+30°C) U = 2.6V (+80°C) U = 0.9V (+100°C) U = 0.5V |
- |
| #A41 | (#A41) | Signal (-) Front λheated oxygen sensor (HO2S) |
- | λ = 1 when the current is approximately +0.2 mA | Negative current when the fuel air mixture is rich. Range: [-12 mA, +12 mA] |
| #A42 | (#A42) | Signal (+) Front λheated oxygen sensor (HO2S) |
- | λ = 1 when the current is approximately +0.2 mA | Positive current when the fuel air mixture is lean Range: [-12 mA, +12 mA] |
| #A43 | (#A43) | Signal, gas pressure sensor, regulator | - | - | Applies only to CNG and only certain versions |
| #A44 | (#A44) | - | - | - | - |
| #A45 | (#A45) | Signal (+) Knock sensor (KS) 2 rear |
- | - | Built in resistance 200 kΩ in the sensor |
| #A46 | (#A46) | Signal (+) Knock sensor (KS) 1, front |
- | - | Built in resistance 200 kΩ in the sensor |
| #A47 | (#A47) | Signal (+) Camshaft sensor |
U ≈ 5V or U = Ulow | f ≈ 35 Hz U ≈ 2.5V |
The frequency increases with engine speed (RPM) |
| #A48 | (#A48) | Signal (+) Flywheel sensor |
U = 2.5V | U = sine wave voltage Utop = 3.5V Uoffset = 2.5V |
- |
| #A49 | (#A49) | - | - | - | - |
| #A50 | (#A50) | Control signal ignition coil no. 5 |
U = Ulow | U = 2.5V thigh = 2 ms |
The frequency varies according to engine speed (RPM) |
| #A51 | (#A51) | Control signal ignition coil no. 4 |
U = Ulow | U = 2.5V thigh = 2 ms |
The frequency varies according to engine speed (RPM) |
| #A52 | (#A52) | - | - | - | - |
| #A53 | (#A53) | Power ground 3 | Ulow | - | - |
| #A54 | (#A54) | Power ground 2 | Ulow | - | - |
| #A55 | (#A55) | Communication cable control modules (CAN L) |
- | - | Between the engine control module (ECM) and the throttle unit |
| #A56 | (#A56) | Control signal accelerator pedal (AP) position sensor, pulse width modulation (PWM) signal |
Utop = 12V t = 4ms pulse ratio = 8 %-88 % |
- | Between the engine control module (ECM) and the throttle unit |
| #A57 | (#A57) | Power supply, camshaft position (CMP) sensor | U = 5V | - | - |
| #A58 | (#A58) | Voltage supply manifold absolute pressure (MAP) sensor, air conditioning (A/C) pressure sensor, gas pressure sensor | U = 5V | - | Gas pressure sensor, governor applies only to CNG and only certain versions |
| #A59 | (#A59) | - | - | - | - |
| #A60 | (#A60) | Signal ground mass air flow (MAF) sensor |
U = Ulow | - | - |
| #A61 | (#B1) | Signal ground intake temperature sensor, engine coolant temperature (ECT) sensor, rear heated oxygen sensor (HO2S), gas pressure sensor | U = Ulow | - | Gas pressure sensor, governor applies only to CNG and only certain versions |
| #A62 | (#B2) | Power ground 1 | U = Ulow | - | - |
| #A63 | (#B3) | - | - | - | - |
| #A64 | (#B4) | Signal (-) Knock sensor (KS) 1 and 2 |
- | - | Built in resistance 200 kΩ in the sensor |
| #A65 | (#B5) | Signal ground the camshaft position (CMP) sensor |
U = Ulow | - | - |
| #A66 | (#B6) | Signal ground flywheel sensor |
U = Ulow | - | - |
| #A67 | (#B7) | - | - | - | - |
| #A68 | (#B8) | - | - | - | - |
| #A69 | (#B9) | Control signal preheating front heated oxygen sensor (HO2S) |
U = Ubat | Preheating off U = Ubat Preheating U = Ubat |
B+ from the system relay |
| #A70 | (#B10) | Power supply | U = Ubat | - | B+ from the system relay |
Connector terminals #B1 - #B50
| Terminal Data |
Breakout box | Signal type | Ignition ON | Engine idling | Other |
| #B1 | (#B11) | Communication cable control modules (CAN L) |
- | - | Data communication, the high speed network |
| #B2 | (#B12) | - | - | - | - |
| #B3 | (#B13) | - | - | - | - |
| #B4 | (#B14) | Signal ground intake manifold air temperature sensor fuel tank pressure sensor clutch pedal sensor brake pedal sensor |
U = Ulow | - | - |
| #B5 | (#B15) | Signal ground accelerator pedal (AP) position sensor |
U = Ulow | - | - |
| #B6 | (#B16) | - | - | - | - |
| #B7 | (#B17) | - | - | - | - |
| #B8 | (#B18) | Coolant level sensor | U = Ulow | - | - |
| #B9 | (#B19) | Power supply accelerator pedal (AP) position sensor, analog sensor |
U = 5V | - | - |
| #B10 | (#B20) | Power supply fuel tank pressure sensor |
U = 5V | - | - |
| #B11 | (#B21) | 30-supply (power supply from battery) | U = Ubat | - | - |
| #B12 | (#B22) | - | - | - | - |
| #B13 | (#B23) | Control modules communication cable (CAN H) | - | - | Data communication, the high speed network |
| #B14 | (#B24) | - | - | - | - |
| #B15 | (#B25) | Signal clutch pedal sensor |
U = 3.3V (unaffected) U = 2.2V (fully depressed, 100 mm) |
- | Varies depending on the position of the clutch pedal |
| #B16 | (#B26) | Signal brake sensor |
U = 4.4V (unaffected) U = 3.9V (25 mm depressed) |
- | Varies depending on the position of the brake pedal |
| #B17 | (#B27) | Signal accelerator pedal (AP) position sensor, analog signal |
U = 0.4V (idle) U = 4.4V (wide open throttle (WOT)) |
- | Varies depending on the position of the accelerator pedal (AP) |
| #B18 | (#B28) | - | - | - | - |
| #B19 | (#B29) | - | - | - | - |
| #B20 | (#B30) | - | - | - | - |
| #B21 | (#B31) | - | - | - | - |
| #B22 | (#B32) | Diagnostic lead C-link | U = 90% of Ubat | If a generic fault-tracing instrument is connected to the data link connector (DLC), other values apply |
- |
| #B23 | (#B33) | Signal (+) crank, +50 supply |
U = Ulow | U = Ulow | U = Ubat at crank |
| #B24 | (#B34) | - | - | - | - |
| #B25 | (#B35) | Signal (+) accelerator pedal (AP) position sensor, PWM signal |
Utop = Ubat t = 4 ms pulse ratio = 8-88% |
- | Between the accelerator pedal (AP) position sensor and the engine control module (ECM) |
| #B26 | (#B36) | Signal (+) stop lamp switch |
U = Ubat when the brake pedal is depressed U = Ulow when the brake pedal is not depressed |
- | - |
| #B27 | (#B37) | - | - | - | - |
| #B28 | (#B38) | - | - | - | - |
| #B29 | (#B39) | Signal outside temperature sensor |
(0°C) U = 3.99V (+10°C) U = 3.53V (+20°C) U = 3.01V (+30°C) U = 2.47V |
- | Temperature range: [-50°C, +120°C] |
| #B30 | (#B40) | - | - | - | - |
| #B31 | (#B41) | Signal from the fuel tank pressure sensor | U = 2.5V at 1 kPa negative pressure U = 3.3V at atmospheric pressure (0 kPa overpressure) U = 4.1V at 1kPa overpressure |
- | - |
| #B32 | (#B42) | Reconnected signal from the stepper motor during gas power | - | - | Measures the control value backwards from terminal #B50 |
| #B33 | (#B43) | - | - | - | - |
| #B34 | (#B44) | - | - | - | - |
| #B35 | (#B45) | - | - | - | - |
| #B36 | (#B46) | - | - | - | - |
| #B37 | (#B47) | Signal ignition ON, +15-supply |
U = Ubat | - | - |
| #B38 | (#B48) | System relay control signal |
U = Ulow | U = Ulow | Relay activated: U = Ulow Relay not activated: U = Ubat The system relay runs on (2-5 minutes) |
| #B39 | (#B49) | Control signal for the fuel shut off valve during retardation | Valve active U = Ulow Valve disabled U = Ubat |
- | PWM signal during control of the fuel shut-off valve Only gas operation |
| #B40 | (#B50) | Control signal EVAP canister shut-off valve |
U = 3.82V | - | - |
| #B41 | (#B51) | Control signal to the fuel shut off valve for LPG | U = Ubat | valve active = Ulow valve disabled = Ulow |
The engine control module (ECM) grounds the relay controlling the LPG valve during gas operation |
| #B42 | (#B52) | - | - | - | - |
| #B43 | (#B53) | - | - | - | - |
| #B44 | (#B54) | Control signal A/C activation |
U = Ubat (not activated) U = Ulow (activated) |
- | - |
| #B45 | (#B55) | Control signal fuel pump activation |
Pulse width modulation (PWM) signal | - | Control signal to the central electronic module (CEM) to control the fuel pump (FP) |
| #B46 | (#B56) | Control signal malfunction indicator lamp (MIL) |
U = Ulow | U = Ubat (not activated) U = Ulow (activated) |
- |
| #B47 | (#B57) | - | - | - | - |
| #B48 | (#B58) | Control signal engine start inhibiting |
U = Ulow (activated) U = Uhigh (not activated) |
- | Certain markets only. The engine can only be started with the clutch pedal depressed (U = Ulow) |
| #B49 | (#B59) | - | - | - | - |
| #B50 | (#B60) | Control signal for the stepper motor during gas operation | - | - | Normal range of control approximately 16%-83% Only gas operation |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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