Checking components

The climate control module (CCM) has diagnosed that two or more damper motor modules (DMM) have the same identity on LIN bus 1.

This may be because one damper motor module (DMM) has been installed incorrectly.

After replacing a damper motor module (DMM), it must be allocated a correct identity by the climate control module (CCM). This is performed during identification of the damper motors on the LIN bus.

If a damper motor module (DMM) is installed that already has an identity allocated to it, this can lead to a conflict on the LIN bus.

Remedy by correctly identifying the damper motor.

Other information: 

• See Climate control, location of components
• See Dashboard environment panel (including climate control module (CCM)), replacing
• See Damper motor temperature, replacing
• See Damper motor, defroster, replacing
• See Damper motor, recirculation, replacing
• See Damper motor module (DMM) air distribution, replacing

Refer to Identifying the Damper Motor Module (DMM)