Pinpoint Test DY: Engine Oil Temperature (EOT) Sensor: Introduction

This pinpoint test is intended to diagnose the following:

• engine oil temperature (EOT) sensor (12A648)
• harness circuits: EOT and SIGRTN
• powertrain control module (PCM) (12A650)

Engine oil temperature must be greater than 10°C (50°F) to pass the KOEO self-test and greater than 66°C (150°F) to pass the KOER self-test.

Voltage values calculated for VREF = 5 volts. These values can vary by 15% due to sensor and VREF variations.

Fig 1: Temperature Sensor Voltage And Resistance Characteristic Graph

Courtesy of FORD MOTOR CO.

Fig 2: Engine Oil Temperature (EOT) Sensor Connector

Courtesy of FORD MOTOR CO.

For PCM connector views or reference values, refer to REFERENCE VALUES .