Massey Ferguson 3.03.94 – TECU: High Amp Draw On Auxiliary Valve Switch 6 (TECU)

This code indicates that the electronic control system has detected an abnormally high electrical current (amperage) draw on the circuit responsible for Auxiliary Valve Switch 6. This is typically caused by a short circuit to ground in the wiring harness or an internal short within the switch itself.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4700 Series
• 4707
• 4708
• 4709
• 4710
• 5600 Series
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5700 Series
• 6600 Series
• 7600 Series
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7700 Series
• 7714
• 7715
• 7715S
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 8600 Series
• 8700 Series

1. 1

   Inspect the wiring harness running from the TECU to Auxiliary Valve Switch 6 for chafed wires, melted insulation, or pinched harnesses

2. 2

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

3. 3

   Test the circuit with a multimeter for a short to ground (0V short circuit)

4. 4

   Test the internal resistance of Auxiliary Valve Switch 6 to see if it shows continuity where it shouldn't or has zero resistance across its operational contacts

1. 1

   Power Down

   Turn off the tractor and disconnect the negative battery terminal to prevent further electrical damage during repair.

2. 2

   Access the Switch

   Remove the necessary trim panels on the armrest console or fender to access Auxiliary Valve Switch 6.

3. 3

   Replace or Repair

   If the wiring is damaged: Splice and repair the damaged section of the harness using OEM-approved heat-shrink connectors, or replace the affected harness section. If the switch is faulty: Unplug the connector, unclip/unscrew the faulty switch from its mounting bezel, and install the new replacement switch.

4. 4

   Reassemble

   Reconnect the wiring harness and reinstall all trim panels.

5. 5

   Clear Codes

   Reconnect the battery, turn the ignition on, and use the Massey Ferguson AGCO EDT (Electronic Diagnostic Tool) or onboard dashboard diagnostic menu to clear the stored 03.00.94 fault code.

6. 6

   Test

   Operate Auxiliary Valve 6 to ensure the spool valve actuates correctly without triggering the code.