Signal Specification - ECM
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 approximately 0 V | %pulse = | Pulse ratio (%) |
| T = | Time in milliseconds (ms) |
| Terminal | Breakout box | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #A1 | (#A1) | ||||
| #A2 | (#A2) | Control signal Canister purge (CP) valve | U = Ubat | Pulse width modulation (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) | ||||
| #A6 | (#A6) | ||||
| #A7 | (#A7) | Control signal to the engine cooling fan control module | Pulse width modulation (PWM) signal Ulow = 1.5 V pulse ratio = 10 %-90 % | Uhigh = Ubat -1.5 V f=100Hz | |
| #A8 | (#A8) | ||||
| #A9 | (#A9) | ||||
| #A10 | (#A10) | ||||
| #A11 | (#A11) | Control signal preheating rear heated oxygen sensor (HO2S) | U = Ubat | Preheating OFF U = Ubat Preheating ON 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 -1 V t=2 ms 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 ON 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 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 | Uapprox.5 V or U=Ulow | Fapprox.35 Hz Uapprox.2.5 V | The frequency increases with engine speed (RPM) |
| #A48 | (#A48) | Signal (+) flywheel sensor | U=2.5 V | U = sine wave voltage Utop = 3.5 V Uoffset = 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, pulse width modulation (PWM) signal | Utop = 12 V t = 4 ms pulse ratio = 8 %-88 % | Between the engine control module (ECM) and the throttle unit | |
| #A57 | (#A57) | Power supply, camshaft position (CMP) sensor | U =5 V | ||
| #A58 | (#A58) | Power supply, manifold absolute pressure (MAP) sensor A/C pressure sensor | U =5 V | ||
| #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 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 #A1-#A70
| Terminal | Breakout box | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| #B1 | (#B11) | Communication cable control modules (CAN L) | Between the engine control module (ECM) and the transmission control module (TCM) | ||
| #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 =5 V | ||
| #B10 | (#B20) | Power supply fuel tank pressure sensor | U =5 V | ||
| #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 transmission control module (TCM) | ||
| #B14 | (#B24) | ||||
| #B15 | (#B25) | Signal clutch pedal sensor | U = 3.3 V (unaffected) U = 2.2 V (fully depressed, 100 mm) | Varies depending on the position of the clutch pedal | |
| #B16 | (#B26) | Signal brake sensor | U = 4.4 V (unaffected) U = 3.9 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) | ||||
| #B20 | (#B30) | ||||
| #B21 | (#B31) | ||||
| #B22 | (#B32) | Diagnostic lead C-link | U = 90 % of Ubat | Other values apply if a generic fault-tracing instrument is connected to the data link connector (DLC) | |
| #B23 | (#B33) | Signal (+) crank, +50 supply | U = Ulow | U = Ulow | U = Ubat at crank |
| #B24 | (#B34) | ||||
| #B25 | (#B35) | Signal (+) accelerator pedal (AP) position sensor, Pulse width modulated (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 = 3.99 V (+10°C) U = 3.53 V (+20°C) U = 3.01 V (+30°C) U = 2.47 V | Temperature range: -50°C to +120°C | |
| #B30 | (#B40) | ||||
| #B31 | (#B41) | Signal fuel tank pressure sensor | U = 2.5 V at 1 kPa negative pressure U = 3.3 V at atmospheric pressure (0 kPa overpressure) U = 4.1 V at 1 kPa overpressure | ||
| #B32 | (#B42) | ||||
| #B33 | (#B43) | ||||
| #B34 | (#B44) | ||||
| #B35 | (#B45) | ||||
| #B36 | (#B46) | ||||
| #B37 | (#B47) | Signal ignition ON signal, +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) | ||||
| #B40 | (#B50) | Control signal EVAP canister shut-off valve | U = 3.82 V | ||
| #B41 | (#B51) | ||||
| #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 | 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) |
Connector Terminals #B1-#B50
General Tightening Torque
Note. Screws coated with a locking fluid or self locking nuts must be replaced with new when reinstalled.
See the table below to find the tightening torques for components not included in the summary.
Nuts and screws which are not self locking can be reused provided that they are in good condition.
| Applies to screwed joint with strength class 8.8. | |
|---|---|
| Thread | Tightening torques (Nm) |
| M5 | 5 |
| M6 | 10 |
| M7 | 17 |
| M8 | 24 |
| M10 | 50 |
| M12 | 80 |
| M14 | 130 |
Summary Of Tightening Torques For Specific Components
Note. Screws coated with locking fluid or sealant must be replaced with new when reinstalled.
Always use new screws and nuts when angle tightening. Any exceptions to this rule will be indicated in the method.
Angle-tightening in tight spaces. See Screwed joint, torque/angle tightening .
| Function group 21 | |
|---|---|
| Center screw, exhaust camshaft | Stage 1........ 75 Nm Stage 2........ 90° |
| Center screw, intake camshaft | 110 Nm |
| Cylinder head The screws are tightened in sequence as described in the method. | Stage 1........ 45 Nm Stage 2........ 45 Nm Stage 3........ 90° Stage 4........ 180° |
| Intermediate shaft drive wheel, alternator side | 44 Nm |
| Intermediate shaft drive wheel, auxiliaries side | 60 Nm |
| Drive wheel, alternator | 75 Nm |
| Drain nipple (on water pipe) | 7 Nm |
| Manifold (toward cylinder head) | 25 Nm |
| Sub-frame screw (start on the left-hand side, then the right) | Stage 1........ 105 Nm Stage 2........ 120° |
| Sleeves under cylinder head screws | 10 Nm (left-threaded) |
| Inner timing cover adjuster screw | 3 Nm |
| Chain wheel | 400 Nm |
| Knock sensor (KS) | 20 Nm |
| Carrier plate | Stage 1........ 45 Nm Stage 2........ 50° |
| Intermediate shaft alternator side | 40 Nm |
| Right-hand engine pad to engine | Stage 1........ 30 Nm Stage 2........ 75° |
| Right-hand engine pad to subframe | Stage 1........ 120 Nm Stage 2........ 40° |
| Lower torque rod to subframe | 110 Nm |
| Flywheel | Stage 1........ 45 Nm Stage 2........ 60° |
| Connecting rod cap | Stage 1........ 12 Nm Stage 2........ 20 Nm Stage 3........ 90° |
| Valve cover/cam carrier cover | Standard torque, but to be tightened in sequence. See method. |
| Gear housing | Stage 1........ 10 Nm Stage 2........ 24 Nm |
| Pressure line to power steering pump | 30 Nm |
| Outer timing cover | Standard torque, but to be tightened in sequence. See method. |
| Function group 22 | |
| Oil filter cover | 25 Nm |
| Oil pan plug | 38 Nm |
| Piston cooling valve | 32 Nm |
| Cover plug (beneath piston cooling valve) | 38 Nm |
| Function group 25 | |
| Catalytic converter to manifold | 27 Nm |
| Heated oxygen sensor (HO2S) | 45 Nm |
| Throttle body | 8 Nm |
| Function group 28 | |
| Coolant temperature sensor | 20 Nm |
| Spark plugs | 28 Nm |
| Knock sensor (KS) | 20 Nm |
| Function group 33 | |
| Battery positive cable to starter solenoid | 11 Nm |
| Starter motor B+ terminal | 11 Nm |
| Start impulse cable | 8,5 Nm |