New Holland ENG 3415 – Engine ECU: Glow Plugs: Array of DFCs for Short Circuit in Cylinder 2 Glow Plug

The control module has detected a short circuit (either an internal short within the glow plug itself or a short to ground in the wiring harness) on the circuit supplying power to the glow plug for cylinder number 2.

• 3415
• 1215
• 1220
• 1310
• 1320
• 1510
• 1520
• 1530
• 1900
• 1910
• 1925
• 2110
• Boomer 2030
• Boomer 2035
• Boomer 3040
• Boomer 3045
• Boomer 3050
• Boomer 4055
• Boomer 4060
• TC25
• TC29
• TC33
• TC35
• TC40
• TC45
• L150
• L160
• L170
• L175
• LS170
• C175
• L465
• LX465
• LX565
• W50C
• W60C
• W70C
• W80C

1. 1

   Verify the Fault: Connect the Electronic Service Tool to the diagnostic connector. Start and operate the machine to confirm if fault code 3415 is currently active.

2. 2

   Isolate the Short: Turn the key switch OFF. Disconnect the wiring harness from the cylinder 2 glow plug.

3. 3

   Test the Glow Plug: Measure the resistance of the cylinder 2 glow plug to ground using a multimeter. A reading of zero (or near zero dead short) indicates the glow plug has failed internally and must be replaced.

4. 4

   Test the Harness: If the glow plug tests within normal resistance specifications, measure the resistance through the harness without the sensor/plug connected to check for a short to ground in the wiring between the Engine ECU / Glow Plug Control Module and the plug.

1. 1

   Turn the ignition switch to the OFF position and disconnect the battery ground cable to prevent accidental arcing.

2. 2

   Locate the cylinder 2 glow plug on the engine block.

3. 3

   Carefully remove the retaining nut and disconnect the electrical wire/harness from the top of the glow plug.

4. 4

   If the harness was found to be shorted during diagnostics, repair or replace the damaged section of the wiring harness.

5. 5

   If the glow plug is internally shorted, use a deep socket to carefully unthread and remove the defective glow plug from the cylinder head.

6. 6

   Thread the new OEM glow plug into cylinder 2 by hand to prevent cross-threading, then tighten to the manufacturer's specified torque.

7. 7

   Reconnect the electrical wire to the glow plug and secure the retaining nut.

8. 8

   Reconnect the battery, turn the key ON, and use the Electronic Service Tool to clear the inactive fault codes.

9. 9

   Start the engine and verify that code ENG 3415 does not return.