Operation CHARM: Car repair manuals for everyone.

Description Of Parameters






Description of parameters

Parameters, status

AM/FM button
The parameter indicates whether the climate control module (CCM) recognizes whether the AM/FM button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Eject button
The parameter indicates whether the climate control module (CCM) recognizes whether the eject button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

CD button
The parameter indicates whether the climate control module (CCM) recognizes whether the CD button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

1 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 1 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

2 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 2 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

3 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 3 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

4 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 4 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

5 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 5 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

6 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 6 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

7 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 7 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

8 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 8 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

9 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 9 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

0 button
The parameter indicates whether the climate control module (CCM) recognizes whether the 0 button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

* button
The parameter indicates whether the climate control module (CCM) recognizes whether the * button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

# button
The parameter indicates whether the climate control module (CCM) recognizes whether the # button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

PHONE button
The parameter indicates whether the climate control module (CCM) recognizes whether the PHONE button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

MENU button
The parameter indicates whether the climate control module (CCM) recognizes whether the MENU button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Up button
The parameter indicates whether the climate control module (CCM) recognizes whether the up button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Down button
The parameter indicates whether the climate control module (CCM) recognizes whether the down button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

I<< button
The parameter indicates whether the climate control module (CCM) recognizes whether the I<< button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

I>> button
The parameter indicates whether the climate control module (CCM) recognizes whether the I>> button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

ENTER button
The parameter indicates whether the climate control module (CCM) recognizes whether the ENTER button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

EXIT/CLEAR button
The parameter indicates whether the climate control module (CCM) recognizes whether the EXIT/CLEAR button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Recirculation button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for recirculation is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Button heated rear windshield/door mirrors
The parameter indicates whether the climate control module (CCM) recognizes whether the button for the heated rear windshield/door mirrors is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Max defroster button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for max defroster is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Air distribution defroster button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for air distribution defroster is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Air distribution ventilation button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for air distribution ventilation is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Air distribution floor button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for air distribution floor is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

AC button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for AC is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Seat heater left front button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for the left front seat heater is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Seat heater right front button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for the right front seat heater is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

POWER button
The parameter indicates whether the climate control module (CCM) recognizes whether the POWER button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

SOUND button
The parameter indicates whether the climate control module (CCM) recognizes whether the SOUND button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

AUTO button
The parameter indicates whether the climate control module (CCM) recognizes whether the button for AUTO mode is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

Temperature button
The parameter indicates whether the climate control module (CCM) recognizes whether the temperature button is pressed in or not.
The button is on the keypad for the climate control module (CCM).
Not pressed = the button is not pressed in.
Pressed = the button is pressed in.

AQS LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for the air quality sensor (AQS) should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Recirculation LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for recirculation should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

AUTO LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for AUTO should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Heated rear windshield LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for the heated rear windshield/door mirrors should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Max defroster LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for maximum defrosting should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Defroster LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for air distribution defroster should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Ventilation LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for air distribution ventilation should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Floor LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for floor air distribution should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

AC ON LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for AC ON should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

AC OFF LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for AC OFF should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Left seat heater low LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for left seat heater low should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Left seat heater high LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for left seat heater high should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Right seat heater low LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for right seat heater low should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Right seat heater high LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for right seat heater high should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Temperature left LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for temperature left should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

Temperature right LED
The parameter indicates whether the climate control module (CCM) recognizes whether the LED for temperature right should be lit or not.
The LED is on the keypad for the climate control module (CCM).
Not lit = the LED must not be lit.
Lit = the LED must be lit.

AQS signal (only ECC)
The parameter displays the signal from the air quality sensor (AQS). The climate control module (CCM) uses the signal to regulate the damper motor module (DMM) recirculation.
Off = no increase or reduction in pollutant level.
Level 1 = slow increase in pollutant level.
Level 2 = medium increase in pollutant level.
Level 3 = rapid increase in pollutant level.

Lower electric switch status no. X
The parameter shows if Climate control module (CCM) detects that lower electric switch status no. X is permitted according to the car configuration.
Not permitted = The function is not possible according to the current car configuration.
Permitted = The function is possible according to the current car configuration.

Parameters, value

Evaporator temperature
The value indicates the temperature from the evaporator temperature sensor. The value is used by the climate control module (CCM) to regulate activation of the air conditioning (A/C) compressor.
Measurement range -100 C°-100 C°.
With the ignition off and a cold engine, the value must correspond with the ambient temperature.
When the engine is running and the A/C is activated, the climate control module (CCM) will regulate the compressor as follows:
- Compressor on at 10 C°.
- Compressor off at 6 C°.

Desired position, damper motor, defroster
The value indicates how much the damper for the defroster should be open to correspond to the desired climate control. The climate control module (CCM) transmits the value to the damper motor module (DMM) defroster via the LIN bus.
Measurement range 0-100%.
100% is full capacity.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Actual position, damper motor, defroster
The value indicates how much the damper for the defroster is open. The climate control module (CCM) receives the value from the damper motor module (DMM) for the defroster via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Desired position, damper motor, recirculation
The value indicates how much the damper for recirculation should be open to correspond to the desired climate control. The climate control module (CCM) transmits the value to the damper motor module (DMM) recirculation via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Actual position, damper motor, recirculation
The value indicates how much the damper for recirculation is open. The climate control module (CCM) receives the value from the damper motor module (DMM) recirculation via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Desired position, damper motor, temperature left
The value indicates how much the damper for temperature left should be open to correspond to the desired climate control. The climate control module (CCM) transmits the value to the damper motor module (DMM) temperature left via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Actual position, damper motor, temperature left
The value indicates how much the damper for temperature left is open. The climate control module (CCM) receives the value from the damper motor module (DMM) temperature left via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Desired position, damper motor, temperature right
The value indicates how much the damper for temperature right should be open to correspond to the desired climate control. The climate control module (CCM) transmits the value to the damper motor module (DMM) for temperature right via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Actual position, damper motor, temperature right
The value indicates how much the damper for temperature right is open. The climate control module (CCM) receives the value from the damper motor module (DMM) for temperature right via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Desired position, damper motor, air distribution
The value indicates how much the damper for air distribution should be open to correspond to the desired climate control. The climate control module (CCM) transmits the value to the damper motor module (DMM) air distribution via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Actual position, damper motor, air distribution
The value indicates how much the damper for air distribution is open. The climate control module (CCM) receives the value from the damper motor module (DMM) air distribution via the LIN bus.
Measurement range 0-100%.
0% corresponds to a fully closed damper and 100% corresponds to a fully open damper.

Requested blower fan speed
The value indicates how much the blower fan must blow to correspond to the desired climate control. The climate control module (CCM) controls the blower fan speed by transmitting a signal to the central electronic module (CEM).
Measurement range 0-100%.
0% corresponds to the blower fan switched off, 100% corresponds to maximum blower fan speed.

Power supply
The value indicates the power supply to the climate control module (CCM).
Measurement range 0-50 V.
Normal value approximately 12 V (battery voltage).

Passenger compartment temperature sensor (only ECC)
The parameter indicates the value from the passenger compartment temperature sensor. The climate control module (CCM) uses the signal to regulate the climate in the passenger compartment in the AUTO position.
Measurement range -40- 90 °C.
The value must correspond to the ambient temperature.