Abbreviations

	OBD - Onboard diagnostics
	WABCO ATR driver's position (ATC)
	Current fault: Meaning of the fault code
	Possible current fault:   FC   ECU pin number   Fault description   210   --   EEPROM data checksum fault   95   2   Main water valve: Earth terminal   90   15, 26   Water pump: Plus terminal, implausibility in readback1   85   34   Outside temperature sensor: Plus terminal, earth terminal or outside range   80   24, 25   Water valve: Open circuit, short circuit, earth terminal or plus terminal   75   35   Air outlet temperature sensor: Plus terminal, earth terminal or outside range   65   14   Tacho signal   60   13, 20, 21   Supplementary heating: Earth terminal, open circuit   55   17, 22, 23   Fresh air/recirculation valve: Open circuit, short circuit, earth terminal or plus terminal   50   7, 8, 33   Fresh air valve: Open circuit, short circuit, earth terminal or plus terminal   45   5, 6, 16   Footwell valve: Open circuit, short circuit, earth terminal or plus terminal   40   3, 4, 32   Front screen valve: Open circuit, short circuit, earth terminal or plus terminal
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   Segment   ECU pin number   Fault description   1   --   EEPROM data checksum fault   3   2   Main water valve: Earth terminal   4   15, 26   Water pump: Plus terminal, implausibility in readback1   5   34   Outside temperature sensor: Plus terminal, earth terminal or outside range   6   24, 25   Water valve: Open circuit, short circuit, earth terminal or plus terminal   7   35   Air outlet temperature sensor: Plus terminal, earth terminal or outside range   9   14   Tacho signal   10   13, 20, 21   Supplementary heating: Earth terminal, open circuit   11   17, 22, 23   Fresh air/recirculation valve: Open circuit, short circuit, earth terminal or plus terminal   12   7, 8, 33   Fresh air valve: Open circuit, short circuit, earth terminal or plus terminal   13   5, 6, 16   Footwell valve: Open circuit, short circuit, earth terminal or plus terminal   14   3, 4, 32   Front screen valve: Open circuit, short circuit, earth terminal or plus terminal
	1 The control unit receives the message "water pump running" although the water pump relay is not controlled. This can be caused by a sticking relay contact.