New Holland IC 1009 – IC: Hydraulic Oil Temperature - Over Temperature

The system has detected that the hydraulic oil temperature has exceeded the maximum safe operating threshold of 210° F (99° C). This can be caused by a genuine overheating condition in the hydraulic system or an electrical fault (such as an open circuit) in the temperature sender circuit.

• New Holland 200 Series Skid Steer Loaders
• New Holland Compact Track Loaders
• L218
• L220
• L223
• L225
• L230
• C232
• C238
• Case Alpha Series skid steers
• SR130
• SR160
• SR175
• SV185

1. 1

   Verify the actual physical temperature of the hydraulic fluid to determine if the machine is genuinely overheating.

2. 2

   Ensure the hydraulic oil cooler is not clogged with debris, the cooling fan is operating correctly, and the hydraulic fluid is at the proper level.

3. 3

   If the machine is not genuinely overheating, check the wiring harness for an open circuit.

4. 4

   Perform a continuity test: Turn off the machine and disconnect the battery. Disconnect the X-OILTMP connector from the Hydraulic Oil Temperature Sender and the X-C23 connector from the Instrument Cluster. Check for continuity between Pin 1 of the X-OILTMP connector and Pin 2 of the X-C23 connector.

1. 1

   Resolve Wiring Issues

   If the continuity test fails, locate the break in the wiring harness between the sender and the instrument cluster and repair or replace the affected wire.

2. 2

   Replace the Sender

   If the wiring harness has good continuity and there are no shorts to ground/power, the HYDRAULIC OIL TEMPERATURE SENDER has likely failed internally (opened). Locate the sender on the hydraulic reservoir/valve block. Relieve hydraulic system pressure and drain fluid below the sensor level if necessary. Remove the faulty sender and install the new OEM replacement. Reconnect the X-OILTMP wiring harness connector.

3. 3

   Clear Codes

   Reconnect the battery and use a diagnostic tool (or the machine's cluster interface) to clear the DTC from the Instrument Cluster memory. Run the machine to verify the code does not return.