SIGNAL SPECIFICATION
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.
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 2
| 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 3
| 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 4
| 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 5
| 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 |
|---|---|---|
| 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 |
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 6
| 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 7
| Terminal | Signal type | Ignition on | Idle |
|---|---|---|---|
| #B1 | Ground | Ulow | Ulow |
| #B2 | Power supply | U = Ubat | U = Ubat |
SIGNAL TABLE, CONNECTOR B, WATER PUMP (PARKING HEATER)
Scheme 8
| 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)