Pinpoint Tests F: Intake Air Temperature (IAT) Sensor: Introduction
NOTE:
Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.
This pinpoint test is intended to diagnose the following:
- harness circuits: IAT and SIGRTN
- mass airflow/intake air temperature (MAF/IAT) sensor (12B579)
- PCM (12A650)
Harness Side
| Circuit | Pin |
|---|---|
| IAT (Intake Air Temperature) | 2 |
| SIGRTN (Signal Return) | 4 |
Harness Side
| Circuit | Pin |
|---|---|
| IAT (Intake Air Temperature) | 47 |
| SIGRTN (Signal Return) | 60 |
Harness Side
| Circuit | Pin |