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III.72 ELECTRONIC SYSTEMS S TRALIS AT/AD Base - January 2003 It is directly assembled on heater body and is interfaced with vehicle through a 14-pin connector. It is connected to CAN BCB line. It has a very advanced diagnostic system and transmits possible error codes on vehicle Cluster. Pin Cable Function A1 7506 Positive from water cock knob manual version (25% position) A2 7711 Positive from boiler activating switch A3 Ws/Bi CAN H line A4 7775 Positive for ambient thermostat control (manual version) B1 Gn/ve CAN H line - - - B3 2296 Diagnosis K line B4 6605 Positive for cabin/engine heating key warning light - - - C2 7708 Direct positive from battery C3 0000 Direct negative C4 7783 Positive for fuel batching pump control - - - - - - |