The ECI circuit requires the use of vehicle circuit diagrams. See truck Chassis Electrical Circuit…
International DT466 – ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS – EOT Circuit Operation
The EOT sensor is supplied with a 5 V reference voltage at Pin 2 from ECM Pin X2–1. The sensor is grounded at Pin 1 through the signal ground at ECM Pin X1–6. As the oil temperature increases or decreases, the sensor changes resistance and provides the oil temperature signal voltage at the ECM. The signal voltage is monitored by the ECM to
determine the temperature of the oil.
Fault Detection / Management
The ECM continuously monitors the signal of the EOT sensor to determine if the signal is within an expected
range. If the ECM detects an out of range high or low, the ECM will ignore the EOT signal and assume an engine oil temperature of –20 °C (–4 °F) for starting and 100 °C (212 °F) for engine running conditions.