Pinpoint Tests J: Mass Airflow (MAF) 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:
- mass air flow/intake air temperature (MAF/IAT) sensor (12B579)
- harness circuits: MAF, SIGRTN, and VPWR
- PCM (12A650)
Harness Side
| Circuit | Pin |
|---|---|
| VPWR (Vehicle Power) | 3 |
| MAF (Mass Airflow) | 5 |
| SIGRTN (Signal Return) | 4 |
Harness Side
| Circuit | Pin |
|---|---|
| MAF (Mass Airflow) | 40 |
| SIGRTN (Signal Return) | 60 |
Harness Side
| Circuit | Pin |