The system is intended for diagnosing sensors of damper motors, blower motor, etc. through the system wiring.
Switching from normal control mode to self-diagnostic mode: the engine must be started (turn the ignition key from position «OFF» into position «ON») and press the button «OFF» for at least 5 seconds. per button «OFF» must be pressed within 10 seconds after starting the engine (the ignition key is turned to position «ON»).
This mode can be exited either by pressing the button «AUTO», or by turning the ignition key to position «OFF». The transition from one diagnostic stage to another is carried out by pressing the temperature control button to the required position.
In addition, the transition from step 5 to the helper function («AUXILIARY MECHANISM») performed by pressing the button ▲ (fan, up).