Diagnostic Aids
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 |