Shutter motors

The Manual climate control (MCC) and standard (STD) systems previously had cables between the air distribution controls and the floor, defroster and ventilation shutters. The manual system is now replaced by the same type of controls used on the Electronic climate control (ECC).

• All shutter motors are the stepper type, which means that angle of turn and speed is controlled electronically.
  • Ventilation/floor/defroster via a link system.
  • Recirculation and fresh air via a link system.
  • Temperature left.
  • Temperature right.
• Manual climate control (MCC)/standard (STD) has 4 stepper motors which control the following shutters:
  • Ventilation/floor/defroster via a link system.
  • Recirculation and fresh air via a link system.
  • Temperature left.
  • Temperature right.
• A stepper motor controlling the defroster is introduced on the Electronic climate control (ECC).

Stepper motor 

Previously DC motors were used. The advantages with the stepper motors used is that:

• The stepper motor has no carbon which wears.
• No sensor is required to determine shutter position.
• The turning degree of the motor is determined by the number of control steps from the.
• The stepper motor has a higher holding torque.

The wiring between the stepper motors and the Climate control module consists of 4 cables for supply voltage and direction control and a separate cable for each motor which controls which motor is to be activated.

In a DC motor the length of time a motor is supplied with power determines how many revolutions the motor shaft turns. In a stepper motor it is the number of control steps from the Climate control module. Only when the motor goes to an end position is the number of steps of no importance. The stepper motor are self-adjusting.