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© 1-5 ZF intarder EST42 fault codes ZF INTARDER EST42 DAVIE XD diagnostics manual 15 46-15 No CAN communication possible between any vehicle systems due to problems with the V-CAN: - interruption on pin 49 or 22 or - defective CAN terminating resistance - Normal braking effect of the intarder if the steering column switch is in position 1. - Reduced braking effect of the intarder if the steering column switch is in position 2 or 3. (Current through proportional valve is restricted to 250 mA max.) - No speed indication on DIP if V-constant function is activated - No V-constant function possible 47-19 Incorrect or missing engine speed signal via message on CAN network due to: - interruption on pin 22 - short circuit to earth on pin 49 - short circuit to supply on pin 22 and/or 49 - defective CAN terminating resistance - incorrect message from UPEC unit - Maximum braking effect of intarder restricted to 350 kW - AS Tronic gearbox does not shift down automatically when the intarder is activated. 48-19 Incorrect or missing vehicle speed signal via message on CAN network due to: - interruption on pin 22 - short circuit to earth on pin 49 - short circuit to supply on pin 22 and/or 49 - defective CAN terminating resistance - incorrect message from MTCO unit - Normal braking effect of the intarder if the steering column switch is in position 1. - Reduced braking effect of the intarder if the steering column switch is in position 2 or 3. (Current through proportional valve is restricted to 250 mA max.) - No speed indication on DIP if V-constant function is activated - No V-constant function possible - Intarder does not function during third brake integration braking 49-19 Incorrect or missing cruise control speed signal via message on CAN network due to: - interruption on pin 22 - short circuit to earth on pin 49 - short circuit to supply on pin 22 and/or 49 - defective CAN terminating resistance - incorrect message from UPEC unit - V-constant function not available 51-19 Incorrect or missing current intarder braking torque signal via message on CAN network due to: - interruption on pin 22 - short circuit to earth on pin 49 - short circuit to supply on pin 22 and/or 49 - defective CAN terminating resistance - incorrect message from UPEC unit - If the engine brake is switched on by foot while the V-constant function is activated, the intarder will not be automatically set to the last selected current braking torque once the engine brake is switched off. 64-19 Incorrect or missing CAN extension box signal via message on CAN network due to: - interruption on pin 22 - short circuit to earth on pin 49 - short circuit to supply on pin 22 and/or 49 - defective CAN terminating resistance - incorrect message from CAN extension box - No intarder braking effect possible via CAN extension box 71-13 No supply voltage before ignition for intarder unit (D902) due to: - short circuit to earth, interruption on pin 54 or 55 - defective fuse E199 - No noticeable system limitation Fault code Fault code description with possible cause Symptom |