Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
DC4 CHECK FOR VOLTAGE AT THE SENSOR
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
VPWR | Ground |
Is the voltage greater than 10.5 V?
Yes | No |
|---|---|
GO to DC5 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DC5 CHECK FOR AN OPEN
Note: Only measure the circuits that apply to the vehicle being diagnosed.
• Ignition OFF.
• MAF/IAT Sensor connector disconnected.
• PCM connector disconnected.
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
GND | Ground |
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
MAF | MAF |
MAFRTN | MAFRTN |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to DC6 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DC6 CHECK FOR A SHORT TO GROUND
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
MAF | Ground |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.