Signal description
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) |
|---|---|---|---|
| U bat = | Battery voltage in volts (V) | F = | Frequency in Hertz (Hz) |
| U low = | Voltage near 0V or 0V | %pulse = | Pulse ratio (%) |
| T = | Time in milliseconds (ms) |
| Terminal | Breakout box | Signal type | Ignition on | Idling speed | Other |
|---|---|---|---|---|---|
| #A1 | (#A1) | ||||
| #A2 | (#A2) | Control signal Canister purge (CP) 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= 2.01 V (+20 C) U=2.62 V (+30 C) U=3.21 V | ||
| #A5 | (#A5) | Control signal engine cooling fan (FC) high-speed | Engine cooling fan (FC) off U=Ubat Engine cooling fan (FC) on U=Ulow | ||
| #A6 | (#A6) | Control signal engine cooling fan (FC) low-speed | Engine cooling fan (FC) off U=Ubat Engine cooling fan (FC) on U=Ulow | ||
| #A7 | (#A7) | ||||
| #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) | ||||
| #A13 | (#A13) | ||||
| #A14 | (#A14) | Control signal injector 5 | U=Ubat | T= 2-3ms | 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=0.9 V (at approximately 20 C) | U increases with increased pressure in the system | |
| #A22 | (#A22) | Mass air flow (MAF) sensor signal | U=0.58 V | U=1.33 V Unloaded, engine at operating temperature | U increases with increasing air mass |
| #A23 | (#A23) | Signal manifold absolute pressure (MAP) sensor | U= 1.64 V atmospheric pressure at sea level | U increases with increasing pressure in the intake manifold | |
| #A24 | (#A24) | Signal (+) front heated oxygen sensor (HO2S) signal (+) | Lambda=0.95 V>700 mV lambda=1.10 V<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=2.5 volt thigh=2 ms | The frequency varies according to engine speed (RPM) |
| #A30 | (#A30) | Control signal ignition coil no. 2 | U=Ulow | U=2.5 volt thigh=2 ms | The frequency varies according to engine speed (RPM) |
| #A31 | (#A31) | Control signal ignition coil no. 1 | U=Ulow | U=2.5 volt 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 (brake) 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=3.1 V (+30 C) U=2.6 V (+80 C) U=0.9 V (+100 C) U=0.5 V | ||
| #A41 | (#A41) | Signal (-) front heated oxygen sensor (HO2S) | Lambda=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 heated oxygen sensor (HO2S) | Lambda=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) | ||||
| #A44 | (#A44) | ||||
| #A45 | (#A45) | ||||
| #A46 | (#A46) | Signal (+) knock sensor (KS) | |||
| #A47 | (#A47) | Signal (+) camshaft position (CMP) sensor | |||
| #A48 | (#A48) | Signal (+) flywheel sensor | U=2.5 V | U=sine wave voltage Utop=3.5 V U offset=2.5 V | |
| #A49 | (#A49) | ||||
| #A50 | (#A50) | Control signal ignition coil no. 5 | U=Ulow | U=2.5 volt thigh=2 ms | The frequency varies according to engine speed (RPM) |
| #A51 | (#A51) | Control signal ignition coil no. 4 | U=Ulow | U=2.5 volt thigh=2 ms | The frequency varies according to engine speed (RPM) |
| #A52 | (#A52) | Control signal Air assisted control valve (AACV) | |||
| #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, PWM signal | Utop=12 V 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=5 volt | ||
| #A58 | (#A58) | Power supply, manifold absolute pressure (MAP) sensor A/C pressure sensor | U=5 volt | ||
| #A59 | (#A59) | ||||
| #A60 | (#A60) | Signal ground Mass air flow (MAF) sensor | U=Ulow | ||
| #A61 | (#B1) | Signal ground intake temperature Engine coolant temperature (ECT) sensor rear heated oxygen sensor (HO2S) | U=Ulow | ||
| #A62 | (#B2) | Power ground 1 | U=Ulow | ||
| #A63 | (#B3) | ||||
| #A64 | (#B4) | Signal (-) knock sensor (KS) | |||
| #A65 | (#B5) | Signal ground camshaft position (CMP) sensor | U=Ulow | ||
| #A66 | (#B6) | Signal ground flywheel sensor | U=Ulow | ||
| #A67 | (#B7) | ||||
| #A68 | (#B8) | ||||
| #A69 | (#B9) | Control signal preheating front 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 #A1-#A70
| Terminal | Breakout box | Signal type | Ignition on | Idling speed | Other |
|---|---|---|---|---|---|
| #B1 | (#B11) | Communication cable control modules (CAN L) | Between the engine control module (ECM) and the CAN driver module | ||
| #B2 | (#B12) | ||||
| #B3 | (#B13) | ||||
| #B4 | (#B14) | Signal ground intake air temperature (IAT) 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) | Engine coolant level switch | U=Ulow | ||
| #B9 | (#B19) | Power supply accelerator pedal (AP) position sensor, analog sensor | U=5 volt | ||
| #B10 | (#B20) | Power supply fuel tank pressure sensor | U=5 volt | ||
| #B11 | (#B21) | 30-supply (Power supply from the battery) | U=Ubat | ||
| #B12 | (#B22) | ||||
| #B13 | (#B23) | Control modules communication cable (CAN H) | Between the engine control module (ECM) and the CAN driver module | ||
| #B14 | (#B24) | ||||
| #B15 | (#B25) | Signal clutch pedal sensor | U=3.3 V (unaffected) U=2.2 volt (fully depressed, 100 mm) | Varies depending on the position of the clutch pedal | |
| #B16 | (#B26) | Signal brake sensor | U=3.1 V (unaffected) U=2.6 V (25 mm depressed) | Varies depending on the position of the brake pedal | |
| #B17 | (#B27) | Signal accelerator pedal (AP) position sensor, analog signal | U=0.4 V (idle) U=4.4 V (wide open throttle (WOT)) | Varies depending on the position of the accelerator pedal (AP) | |
| #B18 | (#B28) | ||||
| #B19 | (#B29) | Signal (+) cruise control SET+ | |||
| #B20 | (#B30) | Signal (+) cruise control RESUME | |||
| #B21 | (#B31) | Output signal (+) engine speed | U=Ulow | U=quadratic wave voltage Utop=Ubat | Frequency increases with engine speed (RPM) |
| #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 (brake) lamp switch | U=Ubat when the brake pedal is depressed U=Ulow when the brake pedal is not depressed | ||
| #B27 | (#B37) | Output signal Engine coolant temperature (ECT) to the air conditioning (A/C) system | Utop=Ubat T=4 ms pulse ratio = varies with engine coolant temperature (ECT) | ||
| #B28 | (#B38) | ||||
| #B29 | (#B39) | Signal outside temperature sensor | (0C) U=2.34V (+10C) U=1.82 V (+20C) U=1.38 V (+25C) U=1.19 V (+30C) U=1.03 V | Temperature range: -40C to +110C | |
| #B30 | (#B40) | ||||
| #B31 | (#B41) | Signal fuel tank pressure sensor | U=2.5 V at 1kPa negative pressure U=3.3 V at atmospheric pressure (0kPa overpressure) U=4.1 V at 1kPa overpressure | ||
| #B32 | (#B42) | Signal A/C request | U=Ubat on request, otherwise U=Ulow | ||
| #B33 | (#B43) | Signal cruise control on / off | See terminal #B47 | ||
| #B34 | (#B44) | Signal cruise control SET | See terminal #B47 | ||
| #B35 | (#B45) | ||||
| #B36 | (#B46) | ||||
| #B37 | (#B47) | Signal ignition on signal, +15 supply | U=Ubat | ||
| #B38 | (#B48) | Control signal System relay | U=Ubat | The system relay runs on (2-15 mins) | |
| #B39 | (#B49) | ||||
| #B40 | (#B50) | Control signal EVAP canister shut-off valve | U=3.82 V | ||
| #B41 | (#B51) | Control signal Electronic throttle system (ETS) warning lamp | U=Ulow | U=Ubat (not activated) U=Ulow (activated) | |
| #B42 | (#B52) | ||||
| #B43 | (#B53) | ||||
| #B44 | (#B54) | Control signal A/C activation | U=Ubat (not activated) U=Ulow (activated) | ||
| #B45 | (#B55) | Control signal fuel pump (FP) activation | |||
| #B46 | (#B56) | Control signal malfunction indicator lamp (MIL) | U=Ulow | U=Ubat (not activated) U=Ulow (activated) | |
| #B47 | (#B57) | Power supply Cruise Control | U=Ubat (not activated) U=pulse train Utop=Ubat t=20 ms thigh=0.5 ms | ||
| #B48 | (#B58) | Control signal engine start inhibiting | U=Ulow (activated) U=Uhigh (not activated) | In certain markets, the engine can only be started with the clutch pedal depressed (U=Ulow) | |
| #B49 | (#B59) | ||||
| #B50 | (#B60) |
Connector terminals #B1-#B50
Signal description Motronic 4.4
Connector A #A1 - #A43
All the values specified below are measured between the terminal specified in column 1 and terminal #A42 (signal 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.
The values specified in the chart apply with the engine unloaded and at normal operating temperature.
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) | ||
|---|---|---|---|---|---|
| U bat = | Battery voltage | F = | Frequency in Hertz (Hz) | ||
| U low = | Voltage approximately 0 V or 0 V | % duty = | Duty cycle (pulse ratio) as a percentage (%) | ||
| T = | Time in milliseconds (ms) |
| Terminal | Signal type | Ignition on | Idling speed | Other |
|---|---|---|---|---|
| #A1 | ||||
| #A2 | Signal (+) front knock sensor (KS) (measured to #A17) | U low | ||
| #A3 | Power ground mass air flow (MAF) sensor | U low | ||
| #A4 | Signal mass air flow (MAF) sensor (Measured to #A5) | U = 0.1 - 0.2 V | U approx. 0.9 V | U increases with increasing air mass |
| #A5 | Signal ground mass air flow (MAF) sensor | U low | ||
| #A6 | Signal ground engine speed (RPM) sensor | U low | ||
| #A7 | Control signal engine cooling fan (FC) low-speed | Engine cooling fan (FC) off: U bat Engine cooling fan (FC) on: U approx. 0.1 V | ||
| #A8 | ||||
| #A9 | Control signal injector 5 | U bat | T = 2.2 - 3.6 ms | T increases with engine speed (RPM) and load (measured with EVAP not active) |
| #A10 | Control signal injector 1 | U bat | T = 2.2 - 3.6 ms | T increases with engine speed (RPM) and load (measured with EVAP not active) |
| #A11 | Opening signal the idle air control (IAC) valve | %duty approx. 25 % | % duty = 21 - 32% | %duty increases with load (measured with EVAP not active) |
| #A12 | 15-supply (power supply from the ignition switch) | U bat | ||
| #A13 | Power ground | U low | ||
| #A14 | Control signal front heated oxygen sensor (HO2S), preheating | U bat | Preheating off: U approx. U bat Preheating on: U approx. 0.4 V | |
| #A15 | Power supply the throttle position (TP) sensor | U approx. 4.8 V | ||
| #A16 | Signal the throttle position (TP) sensor | U approx.0.5 V at closed throttle position (CTP) (idling) U approx. 4.3 V at wide open throttle (WOT) | ||
| #A17 | Signal (-) front and rear knock sensors (KS) | U low | ||
| #A18 | Signal ground sensor (measured to battery negative terminal) | U low | ||
| #A19 | Signal (-) rear heated oxygen sensor (HO2S) | U approx. 0.7 V | Only measured with the ignition on | |
| #A20 | Signal engine speed (RPM) sensor (measured to #A6) | U low | U AC approx. 1.6 V f = 825 Hz | |
| #A21 | Signal camshaft position (CMP) sensor | U = U low or 5.0 V U = U low or U bat | F approx. 7 Hz | F increases with engine speed (RPM) |
| #A22 | Control signal engine cooling fan (FC) high-speed | Engine cooling fan (FC) off: U bat Engine cooling fan (FC) on: U < 0.3 V | ||
| #A23 | Control signal injector 4 | U bat | T = 2.2 - 3.6 ms | T increases with engine speed (RPM) and load (measured with EVAP not active) |
| #A24 | Control signal injector 3 | U bat | T = 2.2 - 3.6 ms | T increases with engine speed (RPM) and load (measured with EVAP not active) |
| #A25 | Closing signal the idle air control (IAC) valve | %duty = 75 % | %duty = 68 -78 % | % duty decreases with load (measured with EVAP not active) |
| #A26 | 30-supply (Power supply from the battery) | U bat | ||
| #A27 | Power supply (from main relay) | U bat | ||
| #A28 | Power ground control module | U low | ||
| #A29 | Control signal rear heated oxygen sensor (HO2S), preheating | U bat | Preheating off: U approx. U bat Preheating on: U approx. 0.4 V | |
| #A30 | Signal (+) rear knock sensor (KS) (measured to #A17) | U low | ||
| #A31 | Signal the engine coolant temperature (ECT) sensor | (At an engine coolant temperature (ECT) of +46°C the engine control module (ECM) switches voltage range) | (+20 °C) U approx. 1.81 V (+30 °C) U approx. 1.34 V (+45 °C) U approx. 0.83 V (+46 °C) U approx. 4.0 V (+80 °C) U approx. 2.73 V (+100 °C) U approx. 1.96 V | |
| #A32 | Signal (+) front heated oxygen sensor (HO2S) | U = 1.1 - 1.2 V (measured to terminal #A42) | U oscillates rapidly between 0.0-0.9 V when the probe is warm. Low voltage = lean engine High voltage = rich engine (measured to terminal #A33) | |
| #A33 | Signal (-) front heated oxygen sensor (HO2S) | U approx. 0.7 V | Only measured with the ignition on | |
| #A34 | Signal (+) rear heated oxygen sensor (HO2S) | U low (measured to terminal #A42) | U at even load approximately 0.6 V may vary between 0.0 - 0.9 V depending on the operating conditions. (measured to #A19) | |
| #A35 | ||||
| #A36 | Power supply camshaft position (CMP) sensor | U approx. U bat | ||
| #A37 | Pulsed secondary air injection system (PAIR) pump valve, control signal | U bat | Pulsed secondary air injection system (PAIR) pump valve not active approx. U bat | Active approx. U low |
| #A38 | Control signal injector 2 | U bat | T approx. 2.2 - 3.6 ms | T increases with engine speed (RPM) and load (measured with EVAP not active) |
| #A39 | Control signal Canister purge (CP) valve | U bat | Canister purge (CP) valve: % duty = 0 - 33 % | |
| #A40 | ||||
| #A41 | Control signal main relay | U approx. 1 V | ||
| #A42 | Signal ground control module (measured to the battery negative terminal) | U low | ||
| #A43 |
Connector B terminals #B1 - #B43
All the values specified below are measured between the terminal specified in column 1 and terminal #B28 (signal ground), unless otherwise indicated in brackets in column 2.
Note. It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
The values specified in the chart apply with the engine unloaded and at normal operating temperature.
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) | ||
|---|---|---|---|---|---|
| U bat = | Battery voltage | F = | Frequency in Hertz (Hz) | ||
| U low = | Voltage approximately 0 V or 0 V | % duty = | Duty cycle (pulse ratio) as a percentage (%) | ||
| T = | Time in milliseconds (ms) |
| Terminal | Signal type | Ignition on | Idling speed | Other |
|---|---|---|---|---|
| #B1 | Power supply accelerometer | U approx. 5.0 V | ||
| #B2 | Signal torque limiting (from automatic transmission) | U approx. 1- 2 V below U bat | U low on ignition retardation request (retardation levels 2 and 3) | |
| #B3 | Signal torque limiting (from automatic transmission) | U approx. 1- 2 V below U bat | U low on ignition retardation request (retardation levels 1 and 3) | |
| #B4 | Signal torque limiting acknowledgment (to automatic transmission) | U approx. 2.0 V below U bat | U low when the request has been received | |
| #B5 | ||||
| #B6 | Signal air conditioning (A/C) compressor status | U low | A/C compressor off: U < 0.1 V A/C compressor on: U approx. U bat | |
| #B7 | Control signal malfunction indicator lamp (MIL) (to combined instrument panel) | Lamp lit: U approx. 0.8 V Lamp not lit: U bat | ||
| #B8 | ||||
| #B9 | Signal A/C pressure sensor | U approx. 0.9 V | U approx. 0.9 V (When the air conditioning (A/C) has not been engaged) U increases with increased air conditioning A/C pressure | |
| #B10 | ||||
| #B11 | Control signal ignition discharge module (IDM) | U approx. 0.1 V | F approx. 35 Hz * | U and f increase with engine speed |
| #B12 | Signal load Tq (to automatic transmission) | U approx. 0.8 V | F approx. 35 Hz | F increases with engine speed (RPM) |
| #B13 | ||||
| #B14 | ||||
| #B15 | Power supply fuel tank pressure sensor | U approx. 5 V | ||
| #B16 | ||||
| #B17 | ||||
| #B18 | Signal speed (from combined instrument panel) | U approx. U low or U bat (Voltage depending on position of front wheels) | F increases with speed f = 40 Hz at 20 km/h. | |
| #B19 | Control signal EVAP canister shut-off valve | U approx. U bat | Closed U approx. U bat | Active U approx. U low |
| #B20 | Signal throttle position (TP) sensor (to automatic transmission) | U approx. 0.5 V at closed throttle position (CTP) (idling speed) U approx. 4.3 V at wide open throttle (WOT) | ||
| #B21 | Signal tachometer (to combined instrument panel) | U approx. U bat | F approx. 28 Hz | F increases with engine speed (RPM) |
| #B22 | ||||
| #B23 | Signal engine coolant temperature (ECT) (to ECC and combined instrument panel) | Cold engine (+20°C): f approx. 40 Hz Engine at operating temperature (+100 °C): f approx. 21 Hz | ||
| #B24 | Signal constant idle speed compensation P/N position (from automatic transmission) | P/N-position: U approx. U bat Other positions: U approx. U low Manual U approx. 9.0 V | ||
| #B25 | Signal air conditioning (A/C) relay status | U low | Air conditioning (A/C) relay not activated: U < 0.1 V Air conditioning (A/C) relay activated: U approx. U bat | |
| #B26 | Signal malfunction indicator lamp (MIL) request (from automatic transmission) | U approx. 0 - 1 V | U approx. U bat NOTE: Other values apply if there are diagnostic trouble codes (DTCs) stored in the transmission control module (TCM). | |
| #B27 | Control signal fuel pump | U approx. 7.5 V | F = 42 Hz (multimeter set to U AC ) | |
| #B28 | Signal ground sensor (measured to battery negative terminal) | U < 0.1 V | ||
| #B29 | Power supply A/C pressure sensor | U approx. 5.0 V | ||
| #B30 | ||||
| #B31 | Fuel tank pressure sensor (certain markets only) | U max approx. 4.7 V U nominal approx. 2.5 V U min approx. 0.6 V | ||
| #B32 | Signal accelerometer | U approx. 2.5 V | ||
| #B33 | ||||
| #B34 | ||||
| #B35 | ||||
| #B36 | Diagnostic lead K-link | U approx. 1 - 2 V below U bat | Other values apply if a generic fault-tracing instrument is connected to the data link connector (DLC) | |
| #B37 | ||||
| #B38 | Control signal pulsed secondary air injection system (PAIR) pump relay | U approx. U bat | Pulsed secondary air injection system (PAIR) pump valve off U approx. U bat | Pulsed secondary air injection system (PAIR) pump valve active U approx. U low |
| #B39 | Signal fuel consumption (to trip computer) | U approx. 2 V below U bat No trip computer: U approx. U bat | F approx. 14 - 25 Hz | F increases with engine speed (RPM) and load (measured with EVAP not active) |
| #B40 | Control signal Air conditioning (A/C) relay (allows A/C to start) | U approx. 9 V | Air conditioning (A/C) permitted: U low Air conditioning (A/C) not permitted: U approx. 11 V | |
| #B41 | ||||
| #B42 | Approx. 10 V | |||
| #B43 |
| NOTE |
|---|
| Other values apply if there are diagnostic trouble codes (DTCs) stored in the transmission control module (TCM). |
* = Multimeter 9510060 displays approx.71 Hz as a result of signal interference.