Signal description
General
All values stated below are measured between each connection in column 1 (Conn. control module) and breakout box connection #B3 unless otherwise noted in column 6 (Other). The control module's connections #A1-#A70 correspond to #A1-#B10 on the breakout box, #B1-#B50 correspond to #B11- #B60 on the breakout box.
Note. It is important to connect the breakout box and check the ground connections before starting to measure.
HINT: If the numbering of the connector is different from the numbering on the breakout box, the connector number is given first, #A61, followed by the breakout box number in brackets, #B1. Example: #A61 (#B1).
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) |
|---|---|---|---|
| U bat = | Battery voltage (V) | F = | Frequency in Hertz (Hz) |
| U low = | Voltage approximately 0 V | % duty = | Duty cycle (pulse ratio) in percent (%) |
| T = | Time in milliseconds (ms) | I = | Current in amperes (A) |
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| #A1 | #A1 | Signal electronic throttle module, potentiometer 1 (circuit 1) | U approx. 0.4 - 4 V | The voltage varies depending on the position of the throttle. U increases with increased throttle opening. | |
| #A2 | #A2 | Fuel pressure sensor signal | 350-400 kPa (absolute pressure) U = 1.8 - 2 V | The voltage increases with increased fuel pressure. | |
| #A3 | #A3 | Fuel temperature sensor signal | Uapprox. 0.5 - 4.5 V | Voltage drops with increased fuel temperature. The fuel temperature sensor is integrated in the fuel pressure sensor. | |
| #A4 | #A4 | Signal engine temperature sensor | (+30°C) U = 1.22 V (+80°C) U = 0.29 V (+100°C) U = 0.17 V | ||
| #A5 | #A5 | Intake air temperature (IAT) sensor signal | (+20°C) U = 3.50 V (+30°C) U = 3.00 V (+40°C) U = 2.50 V | Air temperature sensor inlet is integrated in boost pressure sensor. | |
| #A6 | #A6 | Control signal preheating rear heated oxygen sensor | U = U bat | Preheating of: U=U bat Preheating on: U=U low | |
| #A7 | #A7 | Engine cooling fan (FC) control signal | Pulse width modulation (PWM) signal U high min. 70% of U bat U low =1.2 V f = 100 Hz Pulse ratio= 10-95% | ||
| #A8 | #A8 | ||||
| #A9 | #A9 | Control signal EVAP-valve | U = U bat | PWM signal during activation of the canister purge (CP) valve | |
| #A10 | #A10 | ||||
| #A11 | #A11 | ||||
| #A12 | #A12 | ||||
| #A13 | #A13 | Control signal, intake camshaft reset valve | Pulse width modulation (PWM) signal U top =U bat f = 250 Hz (12.5 Hz) Pulse ratio 20-95% | Pulse ratio controls control of the camshaft | |
| #A14 | #A14 | Control signal injector no. 5 | U = U bat | T = 2-3 ms | T increases with engine speed (RPM) and load |
| #A15 | #A15 | Control signal injector no. 3 | U = U bat | T = 2-3 ms | T increases with engine speed (RPM) and load |
| #A16 | #A16 | Control signal injector no. 1 | U = U bat | T = 2-3 ms | T increases with engine speed (RPM) and load |
| #A17 | #A17 | Power supply | U = U bat | Supplied via system relay | |
| #A18 | #A18 | Control signal preheating front heated oxygen sensor | U = U bat | Preheating of: U=U bat Preheating on: U=U low | |
| #A19 | #A19 | Signal ground electronic throttle module, potentiometer 1 and 2 | U=U low | ||
| #A20 | #A20 | Signal electronic throttle module, potentiometer 2 (circuit 2) | Uapprox.4-0.4 V | The voltage varies depending on the position of the throttle. U decreases with increasing throttle opening. | |
| #A21 | #A21 | Exhaust camshaft reset valve control signal | Pulse width modulation (PWM) signal U top =U bat f=250 Hz (12.5 Hz) Pulse ratio 20-95% | Pulse ratio controls control of the camshaft | |
| #A22 | #A22 | Mass air flow (MAF) sensor signal | U = 1 V | U = 1.7 V | U increases with increasing air mass |
| #A23 | #A23 | Signal boost pressure sensor | U = 1.96 V | U increases with increasing boost pressure. | |
| #A24 | #A24 | Front heated oxygen sensor (HO2S), pump current | Pulsed current measurement, not measured | ||
| #A25 | #A25 | ||||
| #A26 | #A26 | Oil pressure switch signal | U=U low | U = U bat | |
| #A27 | #A27 | Signal camshaft sensor 2, camshaft exhaust | U = 5 V | U = Pulsed signal U top = 5 V U offset = 2.5 V | The frequency varies according to engine speed (RPM) |
| #A28 | #A28 | Front heated oxygen sensor (HO2S), calibration current | Not measured | ||
| #A29 | #A29 | Voltage feed 5 V camshaft sensor | U = 5 V | ||
| #A30 | #A30 | Control signal ignition coil no. 2 | U=U low | U = 2.5 V t high = 2 ms | The frequency varies according to engine speed (RPM) |
| #A31 | #A31 | Control signal ignition coil no. 1 | U=U low | U = 2.5 V t high = 2.5 ms | The frequency varies according to engine speed (RPM) |
| #A32 | #A32 | ||||
| #A33 | #A33 | Control signal injector no. 4 | U = U bat | T low =2-3 ms | T increases with engine speed (RPM) and load |
| #A34 | #A34 | Control signal injector no. 2 | U = U bat | T low =2-3 ms | T increases with engine speed (RPM) and load |
| #A35 | #A35 | Control signal (+) electronic throttle module's damper motor | Pulse width modulation (PWM) signal U top =U bat Pulse ratio 0-100% The polarity of the control signal switches when the damper motor is to be controlled in the opposite rotational direction. | The damper motor is controlled using a PWM-signal from the integrated end-stage in the engine control module (ECM) measured to #A36 (#A36) | |
| #A36 | #A36 | Control signal (-) electronic throttle module's damper motor | Pulse width modulation (PWM) signal U top =U bat Pulse ratio 0-100% The polarity of the control signal switches when the damper motor is to be controlled in the opposite rotational direction. | The damper motor is controlled using a PWM-signal from the integrated end-stage in the engine control module (ECM) measured to #A35 (#A35) | |
| #A37 | #A37 | ||||
| #A38 | #A38 | Control signal turbo control valve | U = U bat | For turbo control: PWM-signal f= 32 Hz | |
| #A39 | #A39 | Voltage feed 5 V boost pressure sensor, AC pressure sensor, mass airflow sensor | U= 5 V | ||
| #A40 | #A40 | ||||
| #A41 | #A41 | Signal (+) front heated oxygen sensor | Pulsed current signal, not measured | ||
| #A42 | #A42 | Signal (-) front heated oxygen sensor | Pulsed current signal, not measured | ||
| #A43 | #A43 | ||||
| #A44 | #A44 | ||||
| #A45 | #A45 | Signal (+) rear knock sensor | U=U low | ||
| #A46 | #A46 | Signal (+) front knock sensor | U=U low | ||
| #A47 | #A47 | Signal camshaft sensor 1, camshaft intake | U = 5 V | U = Pulsed signal U top =5 V U offset = 2.5 V | The frequency varies according to engine speed (RPM) |
| #A48 | #A48 | Signal (+), flywheel sensor | U = 2.5 V | U = sinus voltage U top = 5 V U offset = 2.5 V | Measured to #A66 (#B6) The frequency increases with engine speed (RPM) |
| #A49 | #A49 | ||||
| #A50 | #A50 | Control signal ignition coil no. 3 | U=U low | U = 2.5 V t high = 2 ms | The frequency varies according to engine speed (RPM) |
| #A51 | #A51 | Control signal ignition coil no. 5 | U=U low | U = 2.5 V t high = 2 ms | The frequency varies according to engine speed (RPM) |
| #A52 | #A52 | Control signal ignition coil no. 4 | U=U low | U = 2.5 V t high = 2 ms | The frequency varies according to engine speed (RPM) |
| #A53 | #A53 | Power ground 3 | U low | Grounding point, connected to chassis | |
| #A54 | #A54 | Power ground 2 | U low | Grounding point, connected to chassis | |
| #A55 | #A55 | ||||
| #A56 | #A56 | ||||
| #A57 | #A57 | ||||
| #A58 | #A58 | Signal ground mass airflow sensor | U=U low | ||
| #A59 | #A59 | Voltage feed 5 V electronic throttle module, potentiometer 1 and 2 | U = 5 V | ||
| #A60 | #A60 | Signal ground AC pressure sensor, boost pressure sensor, engine temperature sensor | U=U low | ||
| #A61 | #B1 | Signal (+) rear heated oxygen sensor | Uapprox.0.50 V | Above 0.6 V or below 0.3 V | |
| #A62 | #B2 | Signal (-) rear heated oxygen sensor | U=U low | U=U low | |
| #A63 | #B3 | Signal ground | U=U low | Grounding point, connected to chassis | |
| #A64 | #B4 | Signal (-) front knock sensor | U=U low | ||
| #A65 | #B5 | Signal ground camshaft sensor | U=U low | ||
| #A66 | #B6 | Signal (-) flywheel sensor | U = 2.5 V | U = sinus voltage U top = 5 V U offset = 2.5 V | Measured to #A48 (#A48) The frequency increases with increasing engine speed |
| #A67 | #B7 | Signal (-) rear knock sensor | U=U low | ||
| #A68 | #B8 | Signal AC pressure sensor | U = 0.9 V (at approximately 20°C) | U increases with increasing pressure in the AC-system | |
| #A69 | #B9 | ||||
| #A70 | #B10 |
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| #B1 | #B11 | Control modules communication cable (CAN L) | |||
| #B2 | #B12 | ||||
| #B3 | #B13 | ||||
| #B4 | #B14 | Signal ground clutch pedal sensor, outside temperature sensor | U=U low | ||
| #B5 | #B15 | Signal ground accelerator pedal sensor | U=U low | ||
| #B6 | #B16 | ||||
| #B7 | #B17 | Control signal, leak diagnostic unit, pump | Pump motor running: U=U low Pump motor not running: U = U bat | ||
| #B8 | #B18 | Signal, coolant level sensor | U=U low | Low coolant level: U=U bat Normal coolant level: U= Ulow | |
| #B9 | #B19 | Power supply, 5 V accelerator pedal (AP) position sensor | U= 5 V | ||
| #B10 | #B20 | ||||
| #B11 | #B21 | 30-supply (power supply from battery) | U = U bat | U = U bat | Ignition off: U = U bat |
| #B12 | #B22 | ||||
| #B13 | #B23 | Communication cable control module (CAN H) | |||
| #B14 | #B24 | ||||
| #B15 | #B25 | Clutch pedal sensor signal | Unaffected: U = 3.3 V Fully depressed: 100 mm U = 2.2 V | U varies depending on the position of the clutch pedal | |
| #B16 | #B26 | ||||
| #B17 | #B27 | Signal, accelerator pedal (AP) position sensor | U= 0.4 0.1 V for unaffected accelerator pedal U= 2.5-4.4 V for fully depressed accelerator pedal On certain vehicles, the accelerator pedal's position is all the way down before the signal reaches 4.4 V. | U varies depending on the position of the accelerator pedal | |
| #B18 | #B28 | ||||
| #B19 | #B29 | ||||
| #B20 | #B30 | ||||
| #B21 | #B31 | ||||
| #B22 | #B32 | Diagnostic lead C-link | U= 90% of U bat | Other values apply if a generic fault-tracing instrument is connected to the data link connector (DLC) | |
| #B23 | #B33 | Signal crank, 50-supply | U=U low | U=U low | At crank: U = U bat |
| #B24 | #B34 | ||||
| #B25 | #B35 | Signal, accelerator pedal (AP) position sensor | U top = 12 V t = 4 ms pulse ratio= 8% 2% for unaffected accelerator pedal and 50% - 90% for fully depressed accelerator pedal On certain vehicles, the accelerator pedal's position is all the way down before the signal reaches 90%. | PWM-signal from the accelerator pedal position sensor to the engine control module | |
| #B26 | #B36 | Brake lamp switch signal | When brake pedal is actuated: U=U bat When brake pedal is not actuated U=U low | ||
| #B27 | #B37 | ||||
| #B28 | #B38 | ||||
| #B29 | #B39 | Signal, outside temperature sensor | (0°C) U = 2.92 V (+10°C) U = 2.40 V (+20°C) U = 1.90 V (+30°C) U = 1.46 V | Temperature range: -40 to +30°C | |
| #B30 | #B40 | ||||
| #B31 | #B41 | ||||
| #B32 | #B42 | ||||
| #B33 | #B43 | ||||
| #B34 | #B44 | ||||
| #B35 | #B45 | ||||
| #B36 | #B46 | ||||
| #B37 | #B47 | Signal, ignition on, 15-supply | U = U bat | U = U bat | Ignition off: U=U low |
| #B38 | #B48 | System relay, control signal | U=U low | Relay activated: U=U low Relay not activated: U=U bat The system relay has post-run time (2-5 min.) | |
| #B39 | #B49 | ||||
| #B40 | #B50 | Control signal, leak diagnostic unit, valve | Valve activated: U=U low Valve not activated: U=U bat | ||
| #B41 | #B51 | ||||
| #B42 | #B52 | ||||
| #B43 | #B53 | ||||
| #B44 | #B54 | Control signal, air conditioning (A/C) relay | AC-relay activated: U=U low AC-relay not activated: U=U bat | ||
| #B45 | #B55 | Fuel pump (FP) activation control signal | PWM signal to the central electronic module (CEM) to control the fuel pump (FP) relay | ||
| #B46 | #B56 | Malfunction indicator lamp (MIL) control signal | U=U low | Not activated U=U bat Activated: U=U low | |
| #B47 | #B57 | ||||
| #B48 | #B58 | Control signal, engine cooling fan (FC), control modules | Not activated U=U bat Activated: U=U low | The engine cooling fan (FC) is controlled by the engine control module (ECM) | |
| #B49 | #B59 | ||||
| #B50 | #B60 |