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© 200438 1-17 UPEC fault codes UPEC DAVIE XD diagnostics manual 2 78-1 Short circuit to supply of electronically controlled - Fan speed too high 78-2 Short circuit to earth of electronically controlled - Fan speed too low 78-8 Speed of electronically controlled fan clutch interruption on pin A9 and/or A16 of the ECU - interruption on pins A9 and B30 of the ECU - Fan speed is no longer controlled and 81-8 When the steering column switch is operated, short circuit to supply on pin B34 of the ECU - Cruise control function cannot be activated - At the steering column switch the "RES" When the steering column switch is operated, short circuit to supply on pin B32 of the ECU - Cruise control function cannot be activated - At the steering column switch the "RES" When the steering column switch is operated, short circuit to supply on pin B33 of the ECU - "RES" function at the steering column switch When the steering column switch is operated, short circuit to supply on pin B24 of the ECU - Cruise control function cannot be activated - Control function for engine speed control 82-4 Input signal, via clutch pedal proximity switch defective proximity switch - short circuit to supply on pin B20 - towing the vehicle with the engine running - No system response when operating the 83-1 Short circuit to supply on pin B28 of the ECU - Engine speed/torque limiting control cannot 83-8 Unacceptable load on pin B28 of the ECU due to: excessive contact resistance on connection - Engine speed/torque limiting control cannot Fault code Fault code description with possible cause Symptom |