John Deere 1877.09 – BLC (Basic Load Center): CAN BUS Message Cannot Be Received, Information from HCC Control Software

A communication failure on the tractor's Controller Area Network (CAN) bus where the main controller is expecting a data message from the hitch controller, but the message is either missing, corrupted, or cannot be received.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 6105M
• 6115M
• 6125M
• 6135M
• 6140M
• 6150M
• 6170M
• 6105R
• 6115R
• 6125R
• 6140R
• 6150R
• 6170R
• 6190R
• 6210R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8345R

1. 1

   Check for accompanying CAN bus communication codes (e.g., PDU or CCU codes) that might indicate a broader network failure rather than an isolated HCC issue.

2. 2

   Verify power and ground to the HCC by checking the fuses, relays, and ground connections supplying the module.

3. 3

   Inspect the CAN bus wiring harness and connectors between the BLC and the HCC for corrosion, backed-out pins, chafing, or rodent damage.

4. 4

   Verify that the software versions on the BLC and HCC are compatible and up to date to rule out software glitches causing CAN timeout errors.

1. 1

   Disconnect Battery

   Always disconnect the battery before servicing CAN bus wiring or control modules to prevent electrical spikes.

2. 2

   Harness Repair

   If diagnostic testing reveals high resistance or a break in the CAN High or CAN Low lines between the BLC and HCC, repair the damaged wire or replace the affected harness section.

3. 3

   Module Replacement

   If the wiring, power, and grounds are intact, the fault lies internally within a module. If the HCC is completely unresponsive to a diagnostic tool, replace the Hitch Control Controller (HCC). If the HCC is communicating fine with other modules but the BLC refuses to read it, replace the Basic Load Center (BLC).

4. 4

   Reprogramming / Calibration

   If a module is replaced, use John Deere Service ADVISOR (or a compatible tool like Jaltest) to flash the correct software payload to the new module and perform a Hitch Control Unit calibration.

5. 5

   Clear Codes and Test

   Reconnect the battery, clear the inactive 001877.09 code, and cycle the rear hitch to ensure the BLC is receiving the HCC messages.