Case IH 3062 – Engine Control Module (ECM): Injector solenoid valve Cylinder 1 - low source

An electrical malfunction in the fuel injection system where the engine's control system has detected an improper voltage, a weak signal, or a short circuit (specifically on the power stage/low side) within the electrical circuit operating the fuel injector for Cylinder 1.

• Case IH Magnum Series
• Case IH Steiger Series
• Case IH Puma Series
• Case IH Maxxum Series

1. 1

   Visually inspect the engine wiring harness connecting the ECM to the Cylinder 1 fuel injector for chafing, melted insulation, or breaks.

2. 2

   Disconnect the Cylinder 1 injector harness and check the connector pins for corrosion, moisture, or damage.

3. 3

   Use a multimeter to test the injector wiring for continuity back to the ECM, and check for a short circuit to ground or a short circuit to the battery (low voltage circuit).

4. 4

   Measure the resistance (ohms) across the terminals of the Cylinder 1 injector solenoid and compare this reading to the OEM specification or to a known-good injector on a neighboring cylinder.

1. 1

   Power Down

   Turn off the machine, remove the key, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Access the Injector

   Remove the engine valve cover or necessary shielding to access the Cylinder 1 fuel injector and its wiring harness.

3. 3

   Address Wiring

   If diagnostic tests revealed a short or open circuit in the harness, repair the damaged section of the wiring or replace the injector harness assembly.

4. 4

   Replace Injector

   If the wiring tested good but the injector solenoid failed the resistance test: Clean the area around the injector, disconnect the high-pressure fuel line and the injector hold-down clamp, and remove the faulty Cylinder 1 injector. Install the new OEM fuel injector, ensuring you replace the copper sealing washer and any associated O-rings. Reinstall the hold-down clamp and high-pressure fuel line, torquing all fittings to exact OEM specifications.

5. 5

   Reassembly

   Reconnect the electrical harness to the injector and reinstall the valve cover/shielding.

6. 6

   Prime and Clear

   Reconnect the battery. Prime/bleed the fuel system if required by the specific engine manual. Use a diagnostic scan tool to clear fault code 3062 from the ECM, then run the engine to verify the misfire/code does not return.