System Overview

System overview

Control module




The climate control module (CCM) controls the climate control system and the buttons in the dashboard environment panel.
The climate control module (CCM) is located in the center console. There are four different versions of the control module (market dependent). These are:
- ECC (Electronic Climate Control) with switches for the carphone in the keypad
- ECC without switches for the carphone in the keypad
- MCC (Manual Climate Control) with switches for the carphone in the keypad
- MCC without switches for the carphone in the keypad.
ECC is a fully automatic climate control system with air conditioning. It also allows manual settings.
MCC is a manual climate control system with air conditioning.
The climate control module (CCM) communicates with components which are directly connected and also with other control modules and components via LIN and CAN communication.
Climate control module (CCM) communicates via two separate LIN busses with:
- damper motors
- air quality sensor (AQS)
- switch, tunnel console, front and rear (2008-)
- seat heaters
The number of components on the LIN buses varies, depending on the equipment level of the vehicle (ECC/MCC and any options) and whether the vehicle is left or right-hand drive.
The following components communicate on LIN bus 1:
- the damper motor module (DMM) for air distribution
- the damper motor module (DMM) for temperature left
- the damper motor module (DMM) for recirculation (right-hand drive cars only)
- the air quality sensor (AQS) (right-hand drive cars only)
- the left-hand seat heater
- switch, tunnel console, front and rear (2008-)
The following components communicate on LIN bus 2:
- the damper motor module (DMM) for the defroster
- the damper motor module (DMM) for temperature right (ECC only)
- the damper motor module (DMM) for recirculation (left-hand drive cars only)
- the air quality sensor (AQS) (left-hand drive cars only)
- the right-hand seat heater.
The control module checks activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored in certain cases if the control module detects a fault.
Any diagnostic trouble codes (DTCs) are stored in the control module memory. The data can be read off using VIDA.
A simple check to determine that the climate control module (CCM) is powered and grounded is to activate one of the functions controlled by the buttons on the dashboard environment panel and to check that the LEDs come on or go out.
For further information, also see Signal specifications.

Signals
The table below summarizes the input signals to and output signals from the climate control module (CCM). The signal types are divided into directly connected signals, LIN and CAN communication. The illustration below displays the same information with the Volvo component designations.