Massey Ferguson D185 – Dash / Instrument Panel: Electrical signal too high

Electrical signal too high originating from the X57 - Dash Control Center keypad, typically indicating an open circuit, a disconnected plug, a short to power (voltage) in the wiring harness, or an internal failure within the keypad itself.

• MF 8650
• MF 8680
• Interim Tier 4 (2012-2015)
• 7615
• 5613
• MF 8480
• MF 8450
• 7616
• 7618
• 5608
• 7619
• 7626
• MF 8660
• 7624
• MF 8690
• 7614
• MF 8470
• 5610
• 7620
• MF 8600
• MF 8460
• MF 8670
• 5612
• 7622
• 5611
• 5609
• 7600 Series
• 7617
• 8600 Series
• 8670
• 8690
• 5400 Series
• 6400 Series
• 5700 SL Series
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4 Models

1. 1

   Inspect the X57 connection directly under/behind the Dash Control Center keypad for a loose or disconnected plug

2. 2

   Check the wiring harness running from the X57 keypad to the instrument panel (junction X59) for chafed wires shorting to voltage or severed wires causing an open circuit

3. 3

   Disconnect the keypad and inspect the connector pins for corrosion, bent pins, or moisture ingress

4. 4

   Use a multimeter to verify the reference voltage and ground at the keypad connector to ensure the instrument panel is sending the correct voltage

1. 1

   Power Down

   Turn off the tractor and disconnect the negative battery terminal to prevent electrical spikes.

2. 2

   Access the Keypad

   Carefully remove the trim or bezel surrounding the Dash Control Center keypad (X57) on the dashboard/console.

3. 3

   Disconnect and Clean

   Unplug the connector. If corrosion is present, clean the pins with electrical contact cleaner and apply dielectric grease. Reconnect and test the tractor to see if the code clears.

4. 4

   Replace the Keypad

   If the wiring tests good and cleaning the connector does not resolve the D185 code, the internal circuitry of the keypad has likely failed. Remove the mounting screws/clips, extract the old keypad, and install the new unit.

5. 5

   Clear Codes

   Reconnect the battery. Turn the ignition on. Navigate the Dash Control Center screen to the 'DC' icon (Erase the error codes stored in the instrument panel) and execute the clear command.