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HOMESERVICE MANUALSFORD2010FLEX SEL, 3.5 C, FWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - PINPOINT TEST DY: ENGINE OIL TEMPERATURE (EOT) SENSOR THROUGH PINPOINT TEST HE: EXHAUST GAS RECIRCULATION (EGR) SYSTEMS - (EXCEPT DIESEL & HYBRID)PINPOINT TEST DY: ENGINE OIL TEMPERATURE (EOT) SENSORINTRODUCTION
2010 Ford Flex SEL, 3.5 C, FWD

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

2010 Ford Flex SEL, 3.5 C, FWDSECTION Introduction

This pinpoint test is intended to diagnose the following:

  • 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
G06290591Courtesy of FORD MOTOR CO.
TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS

Temperature Temperature Sensor Values
°C °F Voltage Resistance (K ohms)
120 248 0.28 1.18
110 230 0.36 1.55
100 212 0.47 2.07
90 194 0.61 2.80
80 176 0.80 3.84
70 158 1.05 5.37
60 140 1.37 7.70
50 122 1.77 10.97
40 104 2.23 16.15
30 86 2.74 24.27
20 68 3.26 37.30
10 50 3.73 58.75
0 32 4.14 95.85
-10 14 4.45 160.31
Fig 2: Engine Oil Temperature (EOT) Sensor Connector
G06290625Courtesy of FORD MOTOR CO.

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

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PIN REFERENCE CHART

Connector Pin Circuit
170 Pin E58
B35
E57
E27		 SIGRTN
VPWR
VREF
EOT
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.