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HOMESERVICE MANUALSFORD1999MUSTANG GT, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 2556 (ENGINE 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
1999 Ford Mustang GT, 2D Convertible, Standard

PINPOINT TEST DA: Intake Air Temperature (IAT) Sensor: Introduction

1999 Ford Mustang GT, 2D Convertible, StandardSECTION Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

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 Temperature To Voltage Graph
GF0001487Courtesy 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: Electronic Throttle Body Throttle Position Sensor (ETBTPS) Connector - A
GF0001541Courtesy of FORD MOTOR CO.
Pin Circuit
4 MAF RTN (Mass Air Flow Return)
2 SIGRTN (Signal Return)
1 IAT (Intake Air Temperature)

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

Vehicle Connector Pin Circuit
Crown Victoria,
Grand Marquis,
Town Car		 170 Pin T41
E22		 SIGRTN
IAT
Edge,
MKX,
Sable,
Taurus,
Taurus X		 190 Pin B58
B43		 SIGRTN
IAT
Escape/Mariner 3.0L 150 (50-50-50) Pin B41
B20		 SIGRTN
IAT
Escape/Mariner 2.3L 150 (50-50-50) Pin B41
B39		 SIGRTN
IAT
Expedition,
Fusion,
Milan,
MKZ,
Navigator		 140 Pin B58
B43		 SIGRTN
IAT
F-150,
Mark LT		 190 Pin E58
E22		 SIGRTN
IAT
Focus 190 Pin B58
B47		 SIGRTN
IAT
All other vehicles 170 Pin E58
E22		 SIGRTN
IAT
RENDER: 1.0x

NO RELATED

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