John Deere 524162.09 – CLC, BRC, or CCU: Brake Switch Message Missing / Left Brake Pedal Communication Failure

The control unit is either not receiving the expected CAN bus message from the left brake pedal position switch, or the message it is receiving indicates a fault in the switch/sensor circuit.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 9470RT
• 9520RT
• 9570RT
• 8130
• 8230
• 8330
• 8430
• 8530
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC

1. 1

   Perform a system reset by placing the tractor in park, shutting off the engine, and restarting to verify if the code clears

2. 2

   Look for accompanying active CAN bus communication codes (such as ICU 002255.09) that might indicate a broader network issue

3. 3

   Check the B88 sensor unit (brake pedal potentiometer) for proper operation and accurate signal output

4. 4

   Inspect all wiring and connectors related to the brake pedal sensor unit for security, damage, chafing, or corrosion

1. 1

   Power Down

   Turn off the tractor and remove the key to ensure the CAN bus network is powered down.

2. 2

   Access the Pedal Assembly

   Locate the left brake pedal position switch/potentiometer (often referred to as the B88 sensor unit) at the base of the brake pedal assembly inside the cab.

3. 3

   Inspect the Harness

   Disconnect the wiring harness from the switch. Inspect the pins on both the connector and the switch for bent pins, moisture, or corrosion. Clean with contact cleaner if necessary.

4. 4

   Test/Replace the Switch

   If the wiring is intact but the switch is failing to send the correct voltage/signal (or is physically damaged), remove the mounting hardware and replace the left brake pedal switch/potentiometer.

5. 5

   Reassemble and Clear Codes

   Install the new switch, reconnect the harness, and start the tractor. Acknowledge and clear the codes on the CommandCenter display. Test the brake pedal to ensure the fault does not return and that the system registers the pedal movement.