Merlo 4 – MD-CODER, ROTO MCSS, J1939: Accelerator Pedal Error

The system has detected an error related to the accelerator pedal assembly. The signal from the pedal's potentiometer or contactless sensor is implausible, out of its expected range, or the circuit voltage is too low. This typically results in a loss of throttle control, the engine not responding to the accelerator pedal, or the engine only running at idle.

• Telehandlers
• Roto

1. 1

   Visually inspect the accelerator pedal assembly, wiring harness, and connectors for damage, corrosion, or loose connections.

2. 2

   Check for inching pedal issues by unplugging the inching pedal sensor (often a red sensor on the brake pedal) to see if throttle response returns.

3. 3

   Confirm the accelerator pedal sensor is receiving the correct 5V supply voltage.

4. 4

   Check the wiring harness for continuity and for any short circuits to ground or other wires.

5. 5

   Disconnect the accelerator pedal connector and related harness connectors to thoroughly clean the contacts.

6. 6

   If applicable, perform a CAN bus check by measuring resistance between CAN High and CAN Low (should be approximately 60 ohms) and voltage (approximately 2.5V when active).

1. 1

   Verify specific fault code

   Use MerloDiag software to read the specific sub-fault code (e.g., 0DF0E3, 0DF0E4, 0DF0E5) to confirm the exact nature of the error.

2. 2

   Perform wiring and connection repairs

   Based on diagnostic checks, repair any damaged wiring, clean connectors, or resolve inching pedal sensor interference.

3. 3

   Replace accelerator pedal sensor

   If wiring and connections are sound but the fault persists, replace the accelerator pedal potentiometer/sensor.

4. 4

   Calibrate new sensor

   Use MerloDiag diagnostic software to calibrate the new component by setting the zero and full-throttle positions. This often requires an authorized Merlo service technician.