Pinpoint Test DC: Mass Airflow (MAF) Sensor: Introduction
This pinpoint test is intended to diagnose the following:
- mass airflow (MAF) sensor (12B579)
- harness circuits: IAT, GND, MAF, MAFRTN, SIGRTN and VPWR
- PCM (12A650)
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 5.4L, MKX |
A | 4 3 5 6 |
MAFRTN MAF GND VPWR |
| Motorhome/Stripped Chassis/Step Van | A | 5 4 3 |
MAF GND VPWR |
| All other vehicles | A | 4 5 3 |
SIGRTN MAF VPWR |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 6.8L, F-650/F-750, F-Series Super Duty |
190-PIN | B2 B40 |
SIGRTN MAF |
| E-Series 5.4L | 190-PIN | B41 B40 |
MAFRTN MAF |
| F-150 | 198 PIN | B2 | SIGRTN |
| Fiesta | 198 PIN | B9 B8 |
SIGRTN MAF |
| Focus | 198 PIN | E36 E55 |
SIGRTN MAF |
| MKT | 190-PIN | B41 B41 B40 |
SIGRTN MAFRTN MAF |
| MKX, Motorhome/Stripped Chassis/Step Van |
190-PIN | B40 | MAF |
| Mustang | 198 PIN | B54 B73 |
SIGRTN MAF |
| All other vehicles | 190-PIN | B41 B40 |
SIGRTN MAF |