New Holland 3162 – ECM: Fan Actuator - Open Load

The engine control module (ECU) has detected a break in the electrical circuit for the cooling fan actuator, which is the electronically controlled solenoid on the viscous fan clutch assembly. An open load condition indicates that the ECU is sending power to the solenoid but detects no current flow. This means the fan drive is not functioning properly, likely due to a disconnection in the wiring, a faulty connector, or a failed internal solenoid coil.

• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.380
• T8.390
• T8.410
• T8.420
• T8.435
• Magnum 235
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 340
• Magnum 370
• Magnum 380
• CR9040
• CR9060
• CR9065
• CR9070
• CR9080
• CR9090
• CR7.90
• CR8.90
• CR9.90
• CR10.90
• CX8070
• CX8080
• CX8090
• CX7.90
• CX8.80
• CX8.90
• TC5060
• TC5070
• TC5080
• TC5.80
• TC5.90
• TX66
• TX68
• TR88
• TR89
• TR98
• TR99
• 5088
• 6088
• 7088
• 8010
• 9010
• 5130
• 6130
• 7130
• 8230
• 9230
• 8240
• 9240

1. 1

   Visually inspect the wiring harness leading to the fan actuator for chafing, cuts, or heat damage from exhaust components.

2. 2

   Disconnect the fan actuator electrical connector and inspect pins and sockets for corrosion, dirt, or moisture. Ensure it is securely seated when reconnected.

3. 3

   Perform a continuity test on the wiring harness between the ECM and the actuator connector using a multimeter to verify there are no breaks in the wires.

4. 4

   Measure the internal resistance across the pins of the fan actuator. An infinite reading confirms an internal open circuit.

5. 5

   If applicable (for solenoid-activated viscous drives), listen for a 'click' from the solenoid when the key is turned on or activated via a diagnostic tool.

1. 1

   Confirm the Fault

   Verify that fault code 3162 is active.

2. 2

   Perform Diagnostics

   Follow the diagnostic checks listed above to determine the root cause (wiring issue, connector problem, or failed actuator).

3. 3

   Repair Wiring/Connectors

   If a wiring or connector fault is found, repair or replace the damaged section of the harness or the connector.

4. 4

   Replace the Fan Actuator

   If the diagnostic tests confirm that the actuator has failed internally, it must be replaced. This typically involves: Disconnecting the electrical connector, removing the mounting bolts that secure the actuator to the fan drive or engine, installing the new actuator and tightening the bolts to the manufacturer's specification, and reconnecting the electrical connector.

5. 5

   Clear Fault Codes

   After the repair is complete, use a diagnostic tool to clear the fault code from the ECM.

6. 6

   Verify the Repair

   Operate the machine and bring the engine to operating temperature to ensure the fan engages and disengages correctly and that the fault code does not reappear.