Signal Specification, From Model Year 2000 Inclusive
Connector A, terminals #A1-#A24
All values given below are between the respective terminal in column 1 and terminal #A13 (signal ground). If this is not the case it is indicated in parentheses.
NOTE:
It is important to connect the breakout box and check ground terminals before reading off.
| U= | DC voltage in volts (V) | UAC = | Alternating current in volts (V) |
| Ubat = | Battery voltage | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | %duty = | Duty cycle (pulse ratio) as a percentage (%) |
| t = | Time in milliseconds (ms) |
| Terminal in the breakout box | Terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| 1 | #A1 | Washer reservoir level | Lamp lit: U= 2V Lamp not lit: U = 10 - Ubat |
Lamp lit: U= 2V Lamp not lit: U = 10 - Ubat |
- |
| 2 | #A2 | ABS warning lamp | Lamp lit: U = 6 - 8V Lamp not lit: U = Ulow |
Lamp lit: U = 7 -10V Lamp not lit: U = Ulow |
- |
| 3 | #A3 | Mode selector switch signal "B" (applies to model year 2000) | U = Ulow
with the switch in position for: - Speed warning - Average speed - Outside temperature - Mileage U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |
| Mode selector switch signal "B" (applies from model year 2001 inclusive) | U = Ulow
with the switch in position for: - Average speed - Trip odometer - Range to empty fuel tank - Reset button pressed in U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |||
| 4 | #A4 | Left turn signal lamp | Lamp not lit: U = Ulow Lamp lit: U = 8 - 12 V |
Lamp not lit: U = Ulow Lamp lit: U = 8 - 14 V |
When the switch is disengaged: U=10-12V |
| 5 | #A5 | Mode selector switch signal "C" (applies to model year 2000) | U = Ulow
with the switch in position for: - Speed warning - Average speed - Present fuel consumption - Average fuel consumption U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |
| Mode selector switch signal "C" (applies from model year 2001 inclusive) | U = Ulow
with the switch in position for: - Average speed - Average fuel consumption - Present fuel consumption - Reset button pressed in U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |||
| 6 | #A6 | Mode selector switch signal "A" (applies to model year 2000) | U = Ulow
with the switch in position for: - Speed warning - Present fuel consumption - Outside temperature - Range to empty fuel tank U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |
| Mode selector switch signal "A" (applies from model year 2001 inclusive) | U = Ulow
with the switch in position for: - Present fuel consumption - Outside temperature - Trip odometer - Reset button pressed in U = 10-12V in other positions |
When the switch is disengaged: U=10-12V | |||
| 7 | #A7 | Right turn signal lamp | Lamp not lit: U = Ulow Lamp lit: U = 8 - 12 V |
Lamp not lit: U = Ulow Lamp lit: U = 8 - 14 V |
- |
| 8 | #A8 | Spare lamp | Not used | Not used | - |
| 9 | #A9 | Rheostat | U ≈ 2V (rheostat min) U ≈ 10 - 12V (rheostat max) |
U ≈ 2.3V (rheostat min) U≈Ubat (rheostat max) |
- |
| 10 | #A10 | Battery voltage 30+ | U = Ubat | U = Ubat | - |
| 11 | #A11 | - | - | - | - |
| 12 | #A12 | Outside temperature (-) | U = Ulow | U = Ulow | - |
| 13 | #A13 | Signal ground 31- | U = Ulow | U = Ulow | - |
| 14 | #A14 | Front fog lamp bulb | Lamp not lit: U = Ulow Lamp lit: U = 10 - 12 V |
Lamp not lit: U = Ulow Lamp lit: U = 12 - 14 V |
- |
| 15 | #A15 | Trailer | Lamp lit: U = Ubat |
Lamp lit: U = Ubat |
- |
| 16 | #A16 | Fog tail lamps | Lamp not lit: U = Ulow Lamp lit: U = 10 - 12 V |
Lamp not lit: U = Ulow Lamp lit: U = 12 - 14 V |
- |
| 17 | #A17 | Battery voltage 15+ | U = Ubat | U = Ubat | - |
| 18 | #A18 | Cruise control | Lamp lit: U = Ubat |
Lamp lit: U = Ubat |
- |
| 19 | #A19 | Outside temperature (+) | Infocenter and alternative: -40 °C ≈ 4.9V -20 °C ≈ 4.2V -10 °C ≈ 3.8V -5 °C ≈ 3.5V 0 °C ≈ 3.25V 3 °C ≈ 3.0V 5 °C ≈ 2.9V 10 °C ≈ 2.65V 20 °C ≈ 2.15V 30 °C ≈ 1.65V 40 °C ≈ 1.3V 50 °C ≈ 1.0V Without infocenter: U = Ulow |
Without infocenter: U = Ulow | Voltage increases linearly with falling temperature. Measured to A12 (ground). The lamp is permanently lit between +3 °C and -5 °C. The lamp is lit for 30 seconds if the temperature is lower than -5 °C. The lamp is unlit if the temperature is higher than +5 °C. |
| 20 | #A20 | High beam | Off: U = Ulow On: U = Ubat |
Off: U = Ulow On: U = Ubat |
- |
| 21 | #A21 | - | - | - | - |
| 22 | #A22 | Warning | Lamp not lit: U = Ulow Lamp lit: U = 9 - 11V |
Lamp not lit: U = Ulow Lamp lit: U = 9 - Ubat |
- |
| 23 | #A23 | - | - | - | - |
| 24 | #A24 | - | - | - | - |
Connector B, terminals #B1-#B24
All values given below are between the respective terminal in column 1 and terminal #A13 (signal ground). If this is not the case it is indicated in parentheses.
NOTE:
It is important to connect the breakout box and check ground terminals before reading off.
| U= | DC voltage in volts (V) | UAC = | Alternating current in volts (V) |
| Ubat = | Battery voltage | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | %duty = | Duty cycle (pulse ratio) as a percentage (%) |
| t = | Time in milliseconds (ms) |
| Terminal in the breakout box | Terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| 31 | #B1 | - | - | - | - |
| 32 | #B2 | Signal from the VGLA control module for open door | Lamp not lit U = 10 - 12 V Lamp lit U = Ulow |
Lamp not lit U = 12 - 14 V Lamp lit U = Ulow |
- |
| 33 | #B3 | Diagnostic lead | U ≈ 9 - 11 V | U ≈ 9 - 11 V | Other values apply if the fault-tracing instrument is connected to the data link connector (DLC) |
| 34 | #B4 | Output signal, vehicle speed signal to radio | U = Ulow or 9 - Ubat (depending on the position of the right front wheel) | - | |
| 35 | #B5 | Fuel consumption signal | U = Ulow | f = 3-6 Hz Without infocenter: U = Ulow |
Only trip computer |
| 36 | #B6 | Automatic transmission indicator lamp | Lamp on: U = Ulow Lamp not lit: U = Ubat |
The lamp is lit when W (Winter) mode is engaged The lamp flashes when the automatic transmission control module (TCM) has stored diagnostic trouble codes (DTCs) |
|
| 37 | #B7 | Engine speed signal (RPM) | U = Ulow -9V | U= 9V f = 20-30 Hz |
Pulsed signal. For MELCO 2 systems, the engine speed (RPM) signal comes direct from the ignition sensor for the engine management system. |
| 38 | #B8 | Gas level sensor Only applies to bi-fuel cars |
U = 0 - 5V, depending on the gas level |
If the gas level increases, the resistance reduces and the voltage drops. If the gas level falls, the resistance rises and the voltage increases. (measured to B17) |
|
| 39 | #B9 | Fuel level sensor (gasoline / diesel) |
U = 0 - 5V, depending on the fuel level |
If the level increases, the resistance reduces and the voltage drops. If the level falls, the resistance rises and the voltage increases. (measured to B17) |
|
| 40 | #B10 | Engine coolant temperature (ECT) | f = 45 Hz at +25°C f = 20 Hz at +100°C For MELCO 1, diesel engine MSA 15.5 and Fenix 5.1: U = 0 - 5 V depending on the engine coolant temperature (ECT) |
A pulsed signal between 0 V and 5 V with variable frequency and fixed pulse ratio (%duty). f increases with decreasing temperature. For MELCO 1, diesel engine MSA 15.5 and Fenix 5.1: Separate sensor for the combined instrument panel. |
|
| 41 | #B11 | SRS system warning lamp | Lamp lit: U ≈ 6 - 8 V Lamp not lit: U = Ulow -2V |
U ≈ 7 - 9 V | - |
| 42 | #B12 | Signal at high temperature (Diesel engine) |
Lamp lit: U = Ulow Lamp not lit: U = Ubat Gasoline driven cars: U = Ulow |
The connector is grounded when the diesel engine temperature is >120°C | |
| #B12 | Gas level signal to the LPG control module (Only applies to bi-fuel cars) |
U ≈ 12 V: Low level U ≈ 0 V: Level not low |
The LPG control module switches off gas operation if it receives a low gas level signal | ||
| 43 | #B13 | Battery charge warning lamp | U = Ulow | U = 13 -14 V, | When the lamp is ON the low fuel level, the temperature too high LED and the brake fluid lamp light up. |
| 44 | #B14 | Brake fluid level sensor warning lamp | U = 0 - 5 V, | U = Ubat Lamp not lit: |
- |
| 45 | #B15 | Speed output signal | U = Ulow or 9 - Ubat (depending on the position of the right front wheel) | - | |
| 46 | #B16 | Input signal, speedometer from the ABS control module | U = Ulow or 9 - Ubat (depending on the position of the right front wheel) | - | |
| 47 | #B17 | Signal ground for fuel level (including the gas level sensor) and coolant temperature sensor (Melco 1) | U = Ulow | - | |
| 48 | #B18 | Bulb failure warning sensor warning lamp | Lamp not lit: U = Ubat Lamp lit U = Ulow |
- | |
| 49 | #B19 | Parking brake | Engaged: U = Ulow Disengaged: U = Ubat |
- | |
| 50 | #B20 | Oil pressure sensor warning lamp | Lamp lit: U = Ulow |
Lamp not lit: U = Ubat |
- |
| 51 | #B21 | Seat belt warning lamp | Lamp lit: U = 12 - 14 Vbat Lamp not lit U = Ulow |
Lamp flashes (f = 3 Hz). | |
| 52 | #B22 | DSA (traction) indicator lamp, glow plug system or Bi-fuel | Lamp not lit: U = Ubat Lamp lit U = Ulow |
Anti-spin (DSA) for gasoline engines Glow plug indication for diesel engines Gas power, from the LPG control module indication that gas power is engaged |
|
| 53 | #B23 | Malfunction indicator lamp (MIL), engine control module (ECM) | Lamp not lit: U = Ubat Lamp lit U = Ulow |
- | |
| 54 | #B24 | Immobilizer warning lamp | Lamp lit: U = Ulow Lamp not lit: U=Ubat |
- | |