New Holland 3118: ECM 12V Sensor Supply Voltage High

The ECM detects a high voltage level on the 12V sensor supply circuit. This may indicate an overvoltage condition affecting the sensors connected to this circuit.

1. 1

   The 12V sensor supply voltage using a multimeter

2. 2

   Wiring and connections related to the ECM 12V sensor supply circuit

3. 3

   The ECM for proper operation and fault logging

1. 1

   Measure the 12V sensor supply voltage

   Use a multimeter to check the voltage on the 12V sensor supply circuit. Verify it is within the expected range as specified in the service manual.

2. 2

   Inspect wiring and connections

   Check for any damage, corrosion, or loose connections in the wiring and connectors associated with the 12V sensor supply circuit.

3. 3

   Verify ECM functionality

   Check the ECM for any internal faults or errors that may be causing the high voltage reading. Follow the service manual procedures for ECM testing.