Fendt 04.1.B0 – A002 - ECU, enhanced control: Initialisation error / TeachIn fault

Restricted CAN bus data communication. The system is experiencing an initialization error on the communication driver, meaning only limited CAN bus function is possible.

• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 300 Vario (COM III)
• 400 Vario (COM III) (e.g., 411, 412, 413, 414, 415)
• 700 Vario (COM III & SCR) (e.g., 711, 712, 714, 716, 718)
• 800 Vario (COM III) (e.g., 815, 817, 818, 820)
• 900 Vario (COM III & SCR) (e.g., 916, 920, 922, 924, 926, 927, 930, 933, 936)

1. 1

   Test the CAN Bus: Check the physical CAN bus lines for continuity, shorts to ground, or shorts to power.

2. 2

   Check Specific Pins: Inspect CAN II pins 4 and 5 at the A002 ECU connector for corrosion, backed-out pins, or damage.

3. 3

   Verify Voltage Supply: Measure the signal voltage at pin 1 and pin 2 to ensure the ECU is receiving and outputting correct voltages. Check the 'Electronics voltage supply' circuit.

1. 1

   Wiring Repair

   If the diagnostic checks reveal broken wires, poor connections, or short circuits on the CAN bus network (specifically at the A002 E-Box connector), repair the wiring harness.

2. 2

   EOL Programming

   If the wiring is intact, the initialization error is typically a software/programming fault. Connect the FENDIAS diagnostic tool and perform EOL (End-of-Line) programming to re-initialize/re-program the A002 ECU.

3. 3

   Module Replacement

   If EOL programming fails or the A002 ECU has suffered an internal hardware failure, the E-Box must be replaced and subsequently flash-programmed.