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 |
|---|---|---|---|
| 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 |