Signal description, climate control module (CCM), Connector A
General
There may be several connections and connectors between the control module and components.
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 | % duty = | Duty cycle (pulse ratio) as a percentage (%) |
| T = | Time in milliseconds (ms) |
Scheme 397
| Breakout box terminal | Control module terminal | Connecting the component | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|---|
| #25 | #A1 | Splice 53/437-#1 relay central electronic module (CEM) | Signal, extended X-supply | U bat | U bat | |
| #26 | #A2 | Terminal #A3 power unit | Diagnostic signal, blower fan motor | |||
| #27 | #A3 | #A1 power unit | Control signal, blower fan motor | 0-10 mA | 0-10 mA | |
| #28 | #A4 | Signal ground | U low | U low | ||
| #29 | #A5 | Signal ground | U low | U low | ||
| #30 | #A6 | Signal ground | U low | U low | ||
| #31 | #A7 | Central electronic module (CEM) | Signal, alarm LED (in). Internally directly connected to terminal #B17 | 1.9 V 1 Hz 10% duty | 1.9 V 1 Hz 10% duty | |
| #32 | #A8 | Splice 53/425-fuse | 30-supply, power supply climate control module (CCM) | U bat | U bat | |
| #33 | #A9 | Signal ground | U low | U low | ||
| #34 | #A10 | Signal ground | U low | U low | ||
| #35 | #A11 | Control area network (CAN) bus terminal #19 steering wheel module (SWM) | PCCAN L1 | 0-5 V | 0-5 V | |
| #36 | #A12 | Control area network (CAN)-bus terminal #3 driver information module (DIM) | PCCAN L2 | 0-5 V | 0-5 V | |
| #37 | #A13 | Control area network (CAN) bus terminal #9 steering wheel module (SWM) | PCCAN H1 | 0-5 V | 0-5 V | |
| #38 | #A14 | Control area network (CAN)-bus terminal #2 driver information module (DIM) | PCCAN H2 | 0-5 V | 0-5 V | |
| #39 | #A15 | Signal ground | U low | U low | ||
| #40 | #A16 | Splice 53/438-ground 2 A-post R | Power ground (measured to the battery negative terminal) | U low | U low |
Signal description, climate control module (CCM), Connector B
General
There may be several connections and connectors between the control module and components.
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 | % duty = | Duty cycle (pulse ratio) as a percentage (%) |
| T = | Time in milliseconds (ms) |
Scheme 398
| Breakout box terminal | Terminal | Connecting the component | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|---|
| #1 | #B1 | Terminal #2 evap | Signal, evaporator temperature sensor | 0.1-4.85 V | 0.1-4.85 V | ECC, MCC (U low STD) |
| #2 | #B2 | V | ||||
| #3 | #B3 | Terminal #3 air quality sensor | Signal, air quality sensor | Pulse width modulation (PWM) signal, 80 Hz. 0.4-12 V. | Pulse width modulation (PWM) signal, 80 Hz. 0.4-12 V. | ECC |
| #4 | #B4 | Terminal #1 sun sensor | Signal, sun sensor | 0.78-4.62 V | 0.78-4.62 V | ECC, MCC (U low STD) |
| #5 | #B5 | Terminal #5 sun sensor, terminal #5 air quality sensor | Signal ground, sun sensor, air quality sensor and alarm LED | U low | U low | Electronic climate control |
| #6 | #B6 | |||||
| #7 | #B7 | |||||
| #8 | #B8 | |||||
| #9 | #B9 | |||||
| #10 | #B10 | |||||
| #11 | #B11 | Terminal #3 damper motors | Signal ground, damper motor control MA1+ | ~U low | ~U low | |
| #12 | #B12 | Terminal #4 damper motors | Signal ground, damper motor control MA1 | ~U low | ~U low | |
| #13 | #B13 | Terminal #5 damper motors | Signal ground, damper motor control MA2+ | ~U low | ~U low | |
| #14 | #B14 | Terminal #6 damper motors | Signal ground, damper motor control MA2 | ~U low | ~U low | |
| #15 | #B15 | Terminal #3 evap | Signal ground, evaporator temperature sensor | ~U low | ~U low | Electronic climate control (ECC), Manual climate control (MCC) |
| #16 | #B16 | Terminal #1, air quality sensor | Power supply, air quality sensor | 12 V | 12 V | Electronic climate control |
| #17 | #B17 | Terminal #3 sun sensor | Signal, alarm LED (out). Internally directly connected to terminal #A7. | 1.9 V 1 Hz 10% duty | 1.9 V 1 Hz 10% duty | Electronic climate control |
| #18 | #B18 | Terminal #1 damper motor temp left | Signal, damper motor temperature left | 0-U bat | 0-U bat | Quadratic signal when the motor is running |
| #19 | #B19 | Terminal #1 damper motor temp right | Signal, damper motor temperature right | 0-U bat | 0-U bat | Quadratic signal when the motor is running |
| #20 | #B20 | #1 damper motor def | Signal, damper motor, defroster | 0-U bat | 0-U bat | Quadratic signal when the motor is operating (ECC, MCC) |
| #21 | #B21 | Terminal #1 damper motor rec | Signal, damper motor recirculation | 0-U bat | 0-U bat | Quadratic signal when the motor is running |
| #22 | #B22 | Terminal #1 damper motor floor/vent (ECC) terminal #1 damper motor air distribution (MCC, STD) | Signal, damper motor floor/ventilation (ECC), air distribution (MCC, STD) | 0-U bat | 0-U bat | Quadratic signal when the motor is running |