Pinpoint Test Dc: Mass Airflow (MAF) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2017 Lincoln Navigator, 2017 Lincoln MKZ, 2017 Lincoln MKX, 2017 Lincoln MKT, and 2017 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
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 |
|---|---|---|---|
| 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 |
Fig 2: Mass Air Flow Bank 2, Sensor 1/Intake Air Temperature Bank 2 And Sensor 1 (MAF21/IAT21) Sensor Connector
| Pin | Circuit |
|---|---|
| 4 | SIGRTN (Signal Return) |
| 5 | MAF21 (Mass Air Flow Bank 2, Sensor 1) |
| 3 | VPWR (Vehicle Power) |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 6.2L, F-Series Super Duty |
198 PIN | B30 B30 B73 |
SIGRTN MAFRTN MAF |
| F-150 | 198 PIN | B2 | SIGRTN |
| Fiesta | 198 PIN | B9 B8 |
SIGRTN MAF |
| Focus | 154 PIN | E36 E55 |
SIGRTN MAF |
| Ford GT | 198 PIN | B9 E32 E27 B8 |
SIGRTN SIGRTN MAF21 MAF |
| Fusion | 198 PIN | B41 B73 |
SIGRTN MAF |
| MKX | 198 PIN | B40 | MAF |
| All other vehicles | 198 PIN | B54 B73 |
SIGRTN MAF |