PINPOINT TEST DA: Intake Air Temperature (IAT) Sensor: 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 Temperature To Voltage Graph

Courtesy of FORD MOTOR CO.

Fig 2: Electronic Throttle Body Throttle Position Sensor (ETBTPS) Connector - A

Courtesy of FORD MOTOR CO.

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