SIGNAL DESCRIPTION
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 connections before starting to measure.
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 % |
Connector, climate control module (CCM)
| 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 | Only ECC |
| #39 | #A15 | ||||
| #40 | #A16 | Power ground | U low | U low |
SIGNAL TABLE
| 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
Connector, evaporator temperature sensor (Only ECC)
| 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 | Only ECC Temperature dependent | |
| #2 | |||||
| #3 | Signal ground | U low | U low |
SIGNAL TABLE
Connector damper motor module (DMM)
| 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
Connector passenger compartment temperature sensor (only ECC)
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
| 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)
Connector switch tunnel console
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Idle | Miscellaneous |
|---|---|---|---|---|---|
| #1 | Power supply | U bat | U bat | ||
| #2 | |||||
| #3 | LIN communication | Digital signal | Digital signal | ||
| #4 | |||||
| #5 | Power ground | U low | U low |
SIGNAL TABLE