Fault Phenomenon: XCMG RP1253 paver instrument displays extremely high transmission oil temperature, vehicle activates self-protection.

Troubleshooting Process:
– Measured resistance: sensor resistance value abnormal.
– Checked harness: harness worn, short to ground.
– Checked connector: connector water ingress, short.
– Checked actual temperature: infrared thermometer shows normal.

Root Cause: The transmission oil temperature sensor signal wire wore through and shorted to ground, causing the ECU to read an incorrect low resistance signal (corresponding to high temperature).

Required Parts: Repair or replace sensor harness.