Mercedes-Benz CS1000 - Manual (Page 86)

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FAULT CODES - TAU 2.1
DTC Readout Description Cause
86
34 Auxiliary Fan Signal 2 Stage Short Circuit
35 Auxiliary Fan Signal 1 Stage Short Circuit
50 Switchover Valve Block Signal Short Circuit
70 Auxiliary Coolant Pump Open Circuit
71 Automatic A/C Monovalve (Left) Open Circuit
72 Automatic A/C Monovalve (Right) Open Circuit
73 A/C Compressor Signal Open Circuit
74 Auxiliary Fan Signal 2nd Stage Open Circuit
75 Auxiliary Fan Signal 1st Stage Open Circuit