Case IH 67 – EDC (Electronic Draft Control) module: EDC Hydraulic Valve Supply Voltage Too Low

The Electronic Draft Control (EDC) system has detected that the electrical voltage being supplied to the EDC hydraulic valve (which controls the raising and lowering of the rear hitch) has dropped below the required operating threshold.

• MXM
• Case IH MXM 120
• Case IH MXM 130
• Case IH MXM 140
• Case IH MXM 155
• Case IH MXM 175
• Case IH MXM 190
• Case IH Puma 165
• Case IH Puma 180
• Case IH Puma 195
• Case IH Puma 210
• Case IH Puma 225 CVX
• Case IH Maxxum Series

1. 1

   Cycle the key OFF, then ON to retest and see if the code is still active.

2. 2

   Check the condition of Fuse 14.

3. 3

   Enter diagnostic mode H9 on the tractor's display to check for an intermittent fault on channel 8 between fuse 14 and the processor.

4. 4

   Verify if the diagnostic value displayed is less than 35.

1. 1

   Replace Fuse

   If Fuse 14 is blown or faulty, replace it and retest.

2. 2

   Inspect Harness

   If the fuse is intact but the code persists, disconnect processor connector C127.

3. 3

   Repair Wiring

   Locate and repair any open or short circuits in the wiring harness between the fuse panel, the processor (connectors C127/C128), and the EDC hydraulic valve.

4. 4

   Reseat Connectors

   Remove, inspect for corrosion or bent pins, and securely refit the processor connectors (C127 and C128).

5. 5

   Reset and Recalibrate

   If the error still occurs, reset the processor using Mode H8 and perform a full recalibration of the hitch/transmission system.

6. 6

   Replace Processor

   If the error persists after resetting and recalibrating, the internal processor (EDC controller) has failed and must be replaced.