Hello experts, what is the error C2027 KUP2 and how to fix it? Observed on a F430 and it's something related to E-diff (E-diff light on) and CAN messaging/missing some CAN message. But what is it exactly, what could be causing it? Any other thoughts? Any help appreciated! Thanks
Not sure what a c2027 is but a c2017 is a stuck or faulty Ediff solenoid Try a simple Ediff bleed first using a diag tool like a launch mini etc Monitor the locking pressures as you drive ..they should go from 0 to 15 bar as you change speeds turn etc ..this is live data on the "differential" menu Sent from my moto g power using Tapatalk
Q. Are you sure you didn't observe C6027 and not C2027 ? (typo?) KUP2 ( C6027 ) : There is a problem in the reception of the KUP2 CAN message: signals timeout, signals out of range or invalid data. This is typically caused by problems with CAN H and L transmission. Check CAN wiring. ERROR TYPE: CAN reception error CONDITIONS: The error is always detected -- Here's the complete list I have; C6001: Battery Voltage < 5V C6015: Magnetic Valve Connection C6024: Bus CAN Off C6002: Battery Voltage < 10V C6003: Battery Voltage > 16V C6004: KL15 Plausibility C6005: Reset Due To Sudden Power Supply Shortage C6006: Pressure Sensor C6007: Pump Relay Connection C6008: System Recharge C6009: Low System Pressure C6010: High System Pressure C6011: External Accumulator System C6012: Pressure Lock Sensor C6013: The Voltage Of The Zero Lock Sensor Is Out Of Range C6014: Overheating Magnetic Valve's Driver Deactivation C6016: Plausibility Of Magnetic Valve Current & Lock Pressure C6017: Check: Pressure Deviation Too High C6018: Clutch System Moderate Overheat C6019: Clutch System High Overheat C6020: Ecu Sudden Reset C6021: Ecu Error C6022: Eeprom Error C6023: Error: Ecu Temperature Measurement C6025: N_MOT E TABSNM C6026: VRD_LH_ASR E VRD_RH_ASR C6027: KUP2 C6028: Low Priority CAN Signals Missing C6029: High Priority CAN Signals Missing C6030: CAN Signals Missing C6031: Incomplete Vehicle Coding
Good luck identifying the issue with the CAN Bus wiring. The E-Diff CAN is connected to 10 other devices. The signal going from the E-Diff ECU to the OBD port alone goes through 13 splices and 5 connectors. Do we know if "KUP2" is related to a particular device?
If I get time I'll post up details of my engineers way of doing it, this requires my decoded list of CAN messages and their origin's which is unique per model and setup of car (F1, gated, etc.). From this using a USB CAN bus sniffer and my custom software it can show you precisely what's going on, what ecu's are missing or not and much more... Gives you immediate confidence of what's going on instantly.
