Diagnostic Aids
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test only when directed by QUICK TEST. This test is intended to diagnose the following components and circuits:
- Mass Airflow (MAF) sensor.
- Harness circuits: MAF, MAF REF and VPWR.
- PCM.
MAF SENSOR CIRCUIT IDENTIFICATION
| Circuit | PCM Terminal No. | Wire Color |
|---|---|---|
| MAF REF | 53 | Blue/Orange |
| VPWR | 97 | Black/White |
| MAF | 52 | White/Blue |
MAF SENSOR PERFORMANCE
| RPM | Voltage |
|---|---|
| 800 | 1.2-1.4 |
| 1500 | 1.5-1.7 |
| 2000 | 1.7-1.9 |
| 2500 | 1.9-2.1 |
| 3000 | 2.1-2.3 |