Self test

The control unit contains a self-test routine for diagnostic purposes.

Activating the self-test

• • Switch on terminal 15
    
  • Operate both buttons of the seat heating left and right simultaneously and hold pressed for 10 seconds
    
  • Release both buttons (function active)
    
  • Wait for waiting period to elapse (detection phase)
    
  • Flash-code output
    

The flashing code contains the following information

• 2 flashes: defect in the temperature sensor in the seat (short circuit or break)
  
• 3 flashes: defect in the heating element (short circuit or break)
  

If the control unit is in the diagnostic mode, the fault detection phase takes place first. During this period, the heating is switched on with 100% power and all LEDs light up. If a fault has occurred, the heating is immediately deactivated and the fault cause is stored. After the detection period has elapsed, the middle LED goes out and the flashing code is output. If no fault is detected, the middle LED stay off after the detection period. The diagnostic mode can be restarted at all times using the button to deactivate and then reactivate the switch. The detection phase then starts again. You can exit from the diagnostic mode by interrupting the voltage supply (terminal 15).