Connector A terminal A#1-90
NOTE:
Bi-fuel cars: The value for certain signals may deviate from the specifications below if gas power is activated.
HINT: Deactivate gas power when checking EMS 2000 signals.
HINT: All the values given below are measured between the relevant terminal in column 1 and terminal #3, unless otherwise indicated in brackets.
HINT: The values specified in the table apply with the engine unloaded and at normal operating temperature.
NOTE:
It is important that the breakout box is connected according to Connecting the breakout box. EMS 2000 , before the readings are taken.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage near 0 V or 0 V | % Pulse ratio | Duty cycle (pulse ratio) as a percentage (%) |
| t = | Cyclic time in milliseconds (ms) |
| Terminal (Engine control module (ECM) Breakout box) |
Signal type | Ignition on | Engine idling | Notes |
|---|---|---|---|---|
| 1/A1 | Ignition coil cyl. 2/3 Control signal | Ubat (for 1 second after the ignition is switched on) | Low pulse for 3 milliseconds from Ubat to Ulow , then a voltage peak greater than or equal to 100 V | Frequency 13 Hz when the engine is idling |
| 2/A2 | - | - | - | - |
| 3/A3 | Power ground terminal #4 | Ulow | - | - |
| 4/A4 | Canister purge (CP) valve, control signal | Ubat | Pulse ratio = 5-9 % f=8 Hz |
During control: a pulsed signal between 0 V and Ubat with fixed frequency and variable pulse ratio (% duty) |
| 5/A5 | - | - | - | - |
| 6/A6 | Supplementary air valve, injector (only model year -00) | Ubat | - | During control, a pulsed signal between Ulow and Ubat with fixed frequency and variable pulse ratio |
| 7/A7 | - | - | - | - |
| 8/A8 | Engine cooling fan (FC) high-speed, control signal | Engine cooling fan (FC) off = Ubat Engine cooling fan (FC) on = Ulow |
- | - |
| 9/A9 | - | - | - | - |
| 10/A10 | System relay, control signal | Ulow (after 1 second Ubat ) | Ulow | - |
| 11/A11 | Engine coolant temperature (ECT) sensor signal to the combined instrument panel | f=45 Hz at +25 °C f=20 Hz at +100 °C |
- | A pulsed signal between 0 V and 5 V with variable frequency and fixed pulse ratio (% duty) f increases with decreasing temperature |
| 12/A12 | - | - | - | - |
| 13/A13 | Engine coolant temperature (ECT) sensor, signal | U-average = 2.6 V (+25 C) U-average = 0.6 V (+100 C) |
pulse ratio = 20 % f = 20 Hz |
A pulsed signal with a fixed frequency and pulse ratio. The peak voltage decreases as the temperature rises |
| 14/A14 | Air conditioning (A/C) system pressure sensor, signal | U = 0.9 V | U = 0.9 V (when the air conditioning (A/C) has not been on) | The voltage depends on the pressure in the system 1.4-1.8 V when the air conditioning (A/C) is activated |
| 15/A15 | Mass air flow (MAF) sensor, ground | Ulow | - | - |
| 16/B1 | Mass air flow (MAF) sensor, signal | Ulow | U = 0.6 V | U increases with engine speed (RPM) and load |
| 17/B2 | - | - | - | - |
| 18/B3 | - | - | - | - |
| 19/B4 | Knock sensor (KS) ground screen | Ulow | - | - |
| 20/B5 | Torque limiting signal from DSA to ECM | U =5 V | U=2 V (with DSA) U=5 V (without DSA) |
Pulsed signal with fixed frequency of 200 Hz and fixed pulse ratio of 3 ms pulse with factor Tr=0 |
| 21/B6 | - | - | - | - |
| 22/B7 | - | - | - | - |
| 23/B8 | - | - | - | - |
| 24/B9 | Engine speed (RPM) sensor, signal (-) | U = 1.8 V | U DC = 1.8 V U AC = 2.5 Vt-t |
Sine signal retained over DC Frequency and amplitude depend on engine speed (RPM) |
| 25/B10 | - | - | - | - |
| 26/B11 | - | - | - | - |
| 27/B12 | CAN-H to / from TCM | U=2-3 V average voltage | U=2-3 V average voltage | - |
| 28/B13 | Power ground terminal #1 Measured to the battery negative terminal (-) |
Ulow | - | - |
| 29/B14 | 15 supply (+12 V, when the ignition is on) |
Ubat | - | - |
| 30/B15 | 30 supply (+12 V, battery voltage) |
Ubat | - | - |
| 31/A16 | - | - | - | - |
| 32/A17 | Ignition coil cylinder 1/4 control signal | Ubat (for 1 second after the ignition is switched on) | Low pulse for 3 milliseconds from Ubat to Ulow , then a voltage peak greater than or equal to 100 V | Frequency 13 Hz when the engine is idling |
| 33/A18 | Power ground terminal #3 Measured to the battery negative terminal (-) |
- | - | - |
| 34/A19 | Malfunction indicator lamp (MIL), control signal (to the combined instrument panel) |
Ulow
=lamp lit Ubat =Lamp not lit |
- | - |
| 35/A20 | - | - | - | - |
| 36/A21 | Throttle position (TP) sensor output signal from ECM to DSA | pulse ratio = 5% (closed throttle position (CTP)) pulse ratio = 80% (open) |
pulse ratio = 5% (closed) pulse ratio = 80% (open) f = 50 Hz |
A pulsed signal between 0 V and 9 V with fixed frequency and variable pulse ratio (% duty) |
| 37/A22 | - | - | - | - |
| 38/A23 | Engine cooling fan (FC) low-speed, control signal | Engine cooling fan (FC) off: Ubat Engine cooling fan (FC) on = |
- | - |
| 39/A24 | Fuel shut-off system, signal to the LPG control module. Bi-fuel only) | - | U =5 V | Ulow during fuel shut-off |
| 40/A25 | Fuel consumption signal to the combined instrument panel. | With infocenter: Ustable Without infocenter: Ulow |
Pulse train at 500 ms intervals; 1-10 x 1 ms pulses depending on engine coolant temperature (ECT), engine speed (RPM) and load. Pulses between 0 V and 5 V. | - |
| 41/A26 | - | - | - | - |
| 42/A27 | - | - | - | - |
| 43/A28 | Throttle position (TP) sensor, signal | U = 0.6-0.7 V with unaffected throttle position (TP) sensor | - | U = 0.6-4.5 V depending on the position of the accelerator pedal (AP) |
| 44/A29 | Rear heated oxygen sensor (HO2S), signal Measured to terminal #75 |
U =5 V | U oscillates between 0.2-4.8 V | - |
| 45/A30 | Front heated oxygen sensor (HO2S), signal Measured to terminal #75 |
U =5 V | U oscillates between 0-5 V when the probe is hot. Low voltage = lean High voltage = rich |
- |
| 46/B16 | - | - | - | - |
| 47/B17 | - | - | - | - |
| 48/B18 | Intake air temperature (IAT) sensor, signal intake air |
U=2 V at +25 °C U = 0.25 V at +100 °C |
- | - |
| 49/B19 | - | - | - | - |
| 50/B20 | - | - | - | - |
| 51/B21 | Knock sensor (KS), signal | Ulow | - | - |
| 52/B22 | Speed signal from the ABS control module | Ubat | Ubat (-1 V) | Pulsed signal between Ulow and Ubat when the front left wheel is rotated |
| 53/B23 | - | - | - | - |
| 54/B24 | Engine speed (RPM) sensor, signal (+) Measured to terminal #24 |
Ulow | UAC
= 5Vt-t f = 775 Hz (current RPM) |
DC 1.8 Volts with retained sine signal amplitude and frequency increase with engine speed |
| 55/B25 | Gas power active, signal from the LPG control module. Bi-fuel only) |
- | U=5 V when gas power is switched off Ulow when gas power is active |
- |
| 56/B26 | Immobilizer communication cable (also data link connector (DLC) communication link) | No communication on the cable: U=90% of Ubat
. During communication: data communication, pulsed signal between Ubat and 0 V |
Other values apply if a generic fault-tracing instrument is connected to the data link connector (DLC). | The engine control module (ECM) and immobilizer control module communicate with each other for 2 seconds after the ignition is switched on to determine whether engine start should be permitted. After this time, the immobilizer control module changes internally so that the cable is connected to the communication port in the data link connector (DLC) (terminal #7). |
| 57/B27 | CAN-L to / from TCM | U=2-3 V average voltage | U=2-3 V average voltage | - |
| 58/B27 | Camshaft position (CMP) sensor, signal | U = 0 V or 5 V | f = 6-7 Hz (present rpm/120) pulse ratio = 50 % |
Pulsed signal between 0 V and 5 V. The frequency varies with engine speed (RPM) |
| 59/B29 | Injector 1, control signal | Ubat | t = approximately 2 ms | Pulsed signal from Ubat to Ulow , then a voltage peak of 60 V. The pulse length varies with engine speed (RPM) and load |
| 60/B30 | Injector 3, control signal | Ubat | t = approximately 2 ms | Pulsed signal from Ubat to Ulow , then a voltage peak of 60 V. The pulse length varies with engine speed (RPM) and load |
| 61/A31 | - | - | - | - |
| 62/A32 | Camshaft reset valve, control signal | Ubat for 1 second after the ignition is switched on | f = 250Hz | Pulsed signal with fixed frequency and variable pulse ratio |
| 63/A33 | Front heated oxygen sensor (HO2S), preheating, control signal | U = 0 V Ubat when the system relay is connected |
Preheating off: Ubat Preheating on: U=0.5-4.5 V |
Pulsed signal from Ubat to Ulow . The pulse ratio reduces as the temperature in the heated oxygen sensor (HO2S) increases |
| 64/A34 | Idle air control (IAC) valve, control signal | U = 1.2 V (for 1 second immediately after the ignition is switched on) | f = 160 Hz pulse length approximately 2 ms (engine at normal operating temperature) |
Pulsed signal from Ubat to Ulow , fixed frequency, variable pulse ratio |
| 65/A35 | Rear heated oxygen sensor (HO2S), preheating, control signal | U = 0 V Ubat when the system relay is connected |
Preheating off: Ubat Preheating on: U=0.5-4.5 V |
Pulsed signal from Ubat to Ulow . The pulse ratio reduces as the temperature in the heated oxygen sensor (HO2S) increases |
| 66/A36 | Power supply from the system relay | Ubat (for 1 second after the ignition is switched on) |
Ubat | - |
| 67/A37 | Power ground terminal #2 Measured to the battery negative terminal (-) |
Ulow | - | - |
| 68/A38 | A/C relay, control signal | Ubat | Ubat
when the relay is not connected Ulow when the relay is connected |
- |
| 69/A39 | A/C condenser fan, control signal | Ubat | Ubat
when the fan is not on Ulow when the fan is on |
- |
| 69/A39 | Fuel pump relay Bi-fuel only) |
Ubat
when the fuel pump (FP) is not running Ulow when the fuel pump (FP) is running |
||
| 70/A40 | Engine speed (RPM) signal to the combined instrument panel | Ulow | f = 25 Hz (current rpm/30) |
Pulsed signal between 0 V and 10 V with variable frequency and fixed pulse ratio (% duty) |
| 71/A41 | Torque signal from ECM to DSA | Ulow | No pulses when the engine is idling | Pulsed signal between 0 V and Ubat with a length of up to 100μseconds during throttle opening and engine without load |
| 72/A42 | - | - | - | - |
| 73/A43 | Throttle position sensor and engine coolant temperature sensor ground | Ulow | - | - |
| 74/A44 | Throttle position sensor and Air conditioning (A/C) system pressure sensor, power supply | U =5 V | - | - |
| 75/A45 | Front + rear heated oxygen sensor (HO2S), ground | - | - | - |
| 76/B31 | Knock sensor (KS) ground | Ulow | - | - |
| 77/B32 | A/C system pressure sensor + atmospheric pressure sensor, ground | Ulow | - | - |
| 78/B33 | Power supply sensor | U =5 V | - | - |
| 79/B34 | Intake air temperature (IAT) sensor + camshaft position (CMP) sensor, ground | Ulow | - | - |
| 80/B35 | - | - | - | - |
| 81/B36 | - | - | - | - |
| 82/B37 | - | - | - | - |
| 83/B38 | Power supply, camshaft position (CMP) sensor | U =5 V | - | - |
| 84/B39 | - | - | - | - |
| 85/B40 | - | - | - | - |
| 86/B41 | - | - | ||
| 87/B42 | - | - | - | - |
| 88/B43 | Air conditioning (A/C) request from MCC or ECC | Ulow | Air conditioning (A/C) relay not activated: Ulow Air conditioning (A/C) relay activated: Ubat |
Applies when the air conditioning (A/C) and blower fan switch buttons are in the on position |
| 89/B44 | Injector 4, control signal | Ubat | t = approximately 2 ms | Pulsed signal from Ubat to Ulow , then a voltage peak of 60 V. The pulse length varies with engine speed (RPM) and load |
| 90/B45 | Injector 2, control signal | Ubat | t = approximately 2 ms | Pulsed signal from Ubat to Ulow , then a voltage peak of 60 V. The pulse length varies with engine speed (RPM) and load |