SIGNAL SPECIFICATION (2007)
All the values given below are between the terminals stated in column 1 and terminal #A16 in column 2 (signal ground). This applies unless otherwise indicated in brackets.
Note. It is important to connect the breakout box and check the ground terminals before taking readings.
For further information about
- connection of breakout box, see "Connecting breakout box, Climate Control Module (CCM)"
- checking the ground point, "Checking the voltage/ground connection, climate control module (CCM)".
There may be several connections and connectors between the control module and components.
| 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 | T = | Time in seconds |
| PWM = | Pulse width modulated signal in % |
Scheme 6
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #25 | #A1 | 15-supply, power supply climate control module (CCM). | U bat | U bat | Powered via the relay from the central electronic module (CEM) |
| #26 | #A2 | Power supply to indication in the STC/DSTC button | U bat | U bat | Pulse width modulation (PWM) signal |
| #27 | #A3 | Signal, STC/DSTC button | U= 0 V when button is pressed in, U bat otherwise | U= 0 V when button is pressed in, U bat otherwise | |
| #28 | #A4 | Power supply, blower fan passenger compartment temperature sensor | U bat | U bat | Only ECC |
| #29 | #A5 | Signal, evaporator temperature sensor | U= 0.2-4.8 V | U= 0.2-4.8 V | Only ECC, Temperature dependent |
| #30 | #A6 | Signal, passenger compartment temperature sensor | U= 0.4-4.8 V | U= 0.4-4.8 V | Only ECC Temperature dependent |
| #31 | #A7 | LIN bus 2 | Digital signal | Digital signal | Communication with components, LIN bus 2 |
| #32 | #A8 | CAN L1 | Digital signal | Digital signal | |
| #33 | #A9 | CAN L2 | Digital signal | Digital signal | |
| #34 | #A10 | CAN H1 | Digital signal | Digital signal | |
| #35 | #A11 | CAN H2 | Digital signal | Digital signal | |
| #36 | #A12 | LIN bus 1 | Digital signal | Digital signal | Communication with components, LIN bus 1 |
| #37 | #A13 | ||||
| #38 | #A14 | Signal ground, passenger compartment temperature sensor and evaporator temperature sensor | U low | U low | |
| #39 | #A15 | ||||
| #40 | #A16 | Power ground | U low | U low |
SIGNAL TABLE, CLIMATE CONTROL MODULE (CCM) CONNECTOR
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #A1 | Power ground | U low | U low | ||
| #A2 | LIN bus | Digital signal | Digital signal | Communication with the climate control module (CCM) | |
| #A3 | |||||
| #A4 | Power supply, seat heating module (SHM) | U bat | U bat | Powered via the central electronic module (CEM) |
SIGNAL TABLE, SEAT HEATING MODULE (SHM) CONNECTOR A
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #B1 | Power supply, heating loop seat | U bat | U bat | ||
| #B2 | Signal, temperature sensor seat | ||||
| #B3 | Signal ground, temperature sensor seat | ||||
| #B4 | Power ground, heating loop seat | U low | U low |
SIGNAL TABLE, SEAT HEATING MODULE (SHM) CONNECTOR B
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #C1 | Power ground, heating loop backrest | U low | U low | ||
| #C2 | Power supply, heating loop backrest | U bat | U bat |
SIGNAL TABLE, SEAT HEATING MODULE (SHM) CONNECTOR C
Scheme 7
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #1 | Signal, evaporator temperature sensor | 0.2-4.8 V | 0.2-4.8 V | Temperature dependent | |
| #2 | |||||
| #3 | Signal ground | U low | U low |
SIGNAL TABLE, CONNECTOR, EVAPORATOR TEMPERATURE SENSOR (ONLY ECC)
Scheme 8
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #1 | Power supply | U bat | U bat | Powered via the relay on the central electronic module (CEM) | |
| #2 | LIN bus | Digital signal | Digital signal | Communication with the climate control module (CCM) | |
| #3 | Power ground | U low | U low |
SIGNAL TABLE, DAMPER MOTOR MODULE (DMM) CONNECTOR
Scheme 9
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #21 | #1 | ||||
| #22 | #2 | Power ground, blower fan motor | U low | U low | No grounding via the climate control module (CCM) |
| #23 | #3 | Signal ground, passenger compartment temperature sensor | U low | U low | |
| #24 | #4 | Power supply, blower fan motor | U bat | U bat | Power supply only when the connector is connected and there are not faults in the wiring. |
| #25 | #5 | Signal, passenger compartment temperature sensor | U= 0.4-4.8 V | U= 0.4-4.8 V | Temperature dependent |
SIGNAL TABLE, PASSENGER COMPARTMENT TEMPERATURE SENSOR (ONLY ECC) CONNECTOR
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #1 | Power supply | U bat | U bat | Powered via the relay on the central electronic module (CEM) | |
| #2 | LIN bus | Digital signal | Digital signal | Communication with the climate control module (CCM) | |
| #3 | Power ground | U low | U low |
SIGNAL TABLE, AIR QUALITY SENSOR (AQS) CONNECTOR (OPTION, ONLY ECC)
COMPONENT SPECIFICATION
The resistance values assume a temperature of +20°C unless otherwise stated.
| Designation | Type | Value | Other |
|---|---|---|---|
| Coolant temperature sensor | NTC sensor | Resistance: 10°C: approximately 20 kohms 20°C: approximately 12 kohms 30°C: approximately 8 kohms 70°C: approximately 2 kohms 90°C: approximately 1 kohms | |
| Combustion fan | Electrical motor | Resistance in the winding between terminals: 1-10 ohms | |
| Flame sensor | PTC sensor | Resistance: 10°C: approximately 1020 ohms 20°C: approximately 1060 ohms 30°C: approximately 1100 ohms 80°C: approximately 1300 ohms 90°C: approximately 1350 ohms | |
| Water pump | Electrical pump | Resistance in the winding between terminals: 1-10 ohms | |
| Fuel pump | Electrical pump | Resistance in the winding between terminals: approximately 8 ohms | |
| Glow plugs | NTC sensor | Resistance: approximately 1 ohms | |
| Overheat protection thermostat | NTC sensor | Resistance: 10°C: approximately 20 kohms 20°C: approximately 12 kohms 30°C: approximately 8 kohms 70°C: approximately 2 kohms 90°C: approximately 1 kohms |
SIGNAL SPECIFICATION
All the values given below are between the respective terminal in column 1 and terminal #A2 in column 2 (power ground) unless otherwise stated in brackets after the table entry.
Note. It is important to connect the breakout box and check the ground terminals before taking readings.
| 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 | T = | Time in seconds |
| PWM = | Pulse width modulated signal as a % | % duty = | Duty cycle (pulse ratio) as a percentage (%) |
Scheme 10
| Terminal | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|
| #A1 | Power supply | U = Ubat | U = Ubat | |
| #A2 | Power ground | Ulow | Ulow | |
| #A3 | ||||
| #A4 | Control module communication cable (CANH) | 2.5-3.5 V | 2.5-3.5 V | |
| #A5 | Control modules communication cable (CANL) | 1.5-2.5 V | 1.5-2.5 V | |
| #A6 | Power supply, fuel pump | 5 V | 5 V | Pulse width modulation (PWM) signal |
SIGNAL TABLE, CONNECTOR A, COMBUSTION PREHEATER MODULE (CPM)
Scheme 11
| Terminal | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|
| #B1 | Ground | Ulow | Ulow | |
| #B2 | Power supply | U = Ubat | U = Ubat |
SIGNAL TABLE, CONNECTOR B, WATER PUMP (PARKING HEATER)
Scheme 12
| Terminal | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|
| #C1 | Input signal | Flame sensor | ||
| #C2 | Input signal | Flame sensor | ||
| #C3 | Input signal | Coolant temperature sensor | ||
| #C4 | Input signal | Coolant temperature sensor | ||
| #C5 | Input signal | Overheat protection thermostat | ||
| #C6 | Input signal | Overheat protection thermostat | ||
| #C7 | ||||
| #C8 | ||||
| #C9 | PWM | 7.8-8.3 V | 7.8-8.3 V | Glow plugs |
| #C10 | Ground | Ubat | Ubat | Water pump |
| #C11 | Output signal | Water pump | ||
| #C12 | Ground | Ulow | Ulow | Glow plugs |
| #C13 | PWM | 0-8.2 V | 0-8.2 V | Combustion fan |
| #C14 | Ground | Ulow | Ulow | Combustion fan |
SIGNAL TABLE, CONNECTOR C, COMBUSTION PREHEATER MODULE (CPM)