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HOMESERVICE MANUALSLINCOLN2009TOWN CAR SIGNATURE LIMITED, 4.6 VREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - PINPOINT TEST A: NO START THROUGH PINPOINT TEST DK: ACCELERATOR PEDAL POSITION (APP) SENSOR - (EXCEPT DIESEL & HYBRID)PINPOINT TEST DA: INTAKE AIR TEMPERATURE (IAT) SENSORINTRODUCTION
2009 Lincoln Town Car Signature Limited, 4.6 V

Pinpoint Test DA: Intake Air Temperature (IAT) Sensor: Introduction

2009 Lincoln Town Car Signature Limited, 4.6 VSECTION Introduction

This pinpoint test is intended to diagnose the following:

  • integrated mass air flow/intake air temperature (MAF/IAT) sensor (12B579)
  • harness circuits: IAT and SIGRTN
  • powertrain control module (PCM) (12A650)

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

Fig 1: Temperature Sensor Voltage & Resistance Characteristic Graph
G06053965Courtesy 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: Mass Air Flow/Intake Air Temperature (MAF/IAT) Sensor Connector
G06053966Courtesy of FORD MOTOR CO.

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

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR

Vehicle Connector Pin Circuit
E-Series 4.6L,
E-Series 5.4L,
Expedition,
F-150,
Focus,
Navigator		 190-Pin B58
B47		 SIGRTN
IAT
Edge,
Flex,
MKS,
MKX,
Sable,
Taurus,
Taurus X		 190-Pin B58
B43		 SIGRTN
IAT
Escape/Mariner 190-Pin B56
B47		 SIGRTN
IAT
Fusion,
Milan,
MKZ		 140 Pin B58
B43		 SIGRTN
IAT
Town Car 170 Pin T41
E22		 SIGRTN
IAT
All other vehicles 170 Pin E58
E22		 SIGRTN
IAT
RENDER: 1.0x

NO RELATED

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

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