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.
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
GO to DC7 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
DC7 CHECK FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
MAF | Ground |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to DC8 . |
DC8 INTERMITTENT CHECK
• Ignition OFF.
• PCM connector connected.
• MAF/IAT Sensor connector connected.
• Ignition ON, engine running.
• Run the engine up to 1,500 RPM for 5 seconds, then bring it back to idle. Run the engine up to 1,500 RPM for 5 seconds, then bring it back to idle.
• If the idle is not stable, refer to Section 3, No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index.
• Access the PCM and monitor the MAF (VOLT) PID.
• Lightly tap on the MAF/IAT sensor and wiggle the harness connector to simulate road shock.
Does the MAF PID go below 0.3 volt or above 4.7 volts?
Yes | No |
|---|---|
CLEAN the MAF/IAT sensor using CRC Mass Air Flow Sensor Cleaner 05110 or equivalent. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. If the concern is still present, INSTALL a new MAF/IAT sensor. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep | GO to DC9 . |
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.