John Deere 1865.09 – CLC / SSU: ELX Message Missing

The control module is no longer receiving the expected communication messages from the ELX circuit over the CAN bus. This is typically caused by a blown ELX fuse, a failing ELX relay, a short/open in the CAN bus wiring, or a sudden drop in system voltage causing the module to drop offline.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7610
• 7710
• 7810
• 7630
• 7730
• 7830
• 7930
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 8310RT
• 8335RT
• 8360RT
• 9230
• 9330
• 9430
• 9530
• 9630
• 9470RT
• 9520RT
• 9570RT

1. 1

   Restart the tractor (resets communication messages and can clear the code if caused by a transient voltage drop)

2. 2

   Check system voltage at the battery and alternator (if voltage drops below 11.2V for more than 2 seconds, modules can drop off the CAN bus)

3. 3

   Inspect the ELX relay in the main fuse/relay load center (with the tractor running, the relay should feel warm to the touch; if cold, it is likely not engaging)

4. 4

   Inspect the ELX power fuses (often labeled F18, F20, F21, or F08 depending on the model)

5. 5

   Inspect the wiring harness for rubbing or melting (especially on 7000 series, check for harness rubbing against linkages or melting near the exhaust)

1. 1

   Power down system

   Turn off the key switch and disconnect the battery ground to ensure safety while working on the electrical load center.

2. 2

   Access load center

   Remove the cover to the main fuse and relay load center (typically located on the right-hand console or behind the seat).

3. 3

   Replace ELX fuse

   Locate the specific ELX fuse for your model. If it is blown, replace it with a fuse of the exact same amperage (usually a 10 Amp red fuse). Do not use a higher-rated fuse, as this can damage the SSU or CLC modules.

4. 4

   Swap or replace ELX relay

   Locate the ELX Relay (often designated as K23 or K24). Remove it and swap it with a known-good identical relay from a non-critical accessory circuit (like a work lamp relay) to test. If functionality returns, replace the relay permanently.

5. 5

   Clean connections

   Use electrical contact cleaner on the relay and fuse sockets to ensure there is no high resistance caused by corrosion or dirt.

6. 6

   Trace and repair wiring

   If the new fuse blows immediately upon turning the key, you have a dead short. Trace the power supply wire (often a red wire, circuit 502 or 072) from the load center to the CLC/SSU, repairing any chafed or melted sections.

7. 7

   Test and clear codes

   Reconnect the battery, start the tractor, and verify that code 001865.09 has moved from 'Active' to 'Stored'. Clear the stored codes.