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 any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to DA5 . |
DA5 INTERMITTENT CHECK
• Ignition OFF.
• PCM connector connected.
• For EcoSport, F-150 3.5L TIVCT, F-150 5.0L, Fiesta 1.6L TIVCT, Flex 3.5L TIVCT, KA, MKS
3.7L, MKT 3.7L, Mustang 3.7L, Taurus 3.5L TIVCT, Taurus 3.7L and Transit 3.7L,
• MAPT Sensor connector connected.
• For all others,
• IAT Sensor connector connected.
• Ignition ON, engine OFF.
• Access the PCM and monitor the IAT (VOLT) PID.
• While observing the PID, wiggle, shake, and bend small sections of the wiring harness working from the sensor to the PCM.
• Lightly tap on the sensor and wiggle the harness connector to simulate road shock.
Does the IAT PID reading change?
Yes | No |
|---|---|
REPAIR as necessary. For EcoSport, F-150 3.5L TIVCT, F-150 5.0L, Fiesta 1.6L TIVCT, Flex 3.5L TIVCT, KA, MKS 3.7L, MKT 3.7L, Mustang 3.7L, Taurus 3.5L TIVCT, Taurus 3.7L and Transit 3.7L, INSTALL a new MAPT sensor. For all others, INSTALL a new 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 Alive Memory (KAM). REPEAT the self-test. | GO to DA6 . |
DA6 CHECK THE IAT CIRCUIT VOLTAGE CYCLING INTEGRITY
• Ignition OFF.
• For EcoSport, F-150 3.5L TIVCT, F-150 5.0L, Fiesta 1.6L TIVCT, Flex 3.5L TIVCT, KA, MKS
3.7L, MKT 3.7L, Mustang 3.7L, Taurus 3.5L TIVCT, Taurus 3.7L and Transit 3.7L,
• MAPT Sensor connector disconnected.
• Ignition ON, engine OFF.
• Access the PCM and monitor the IAT (VOLT) PID.
• Record the IAT PID value.
• Connect a 5 amp fused jumper wire between the following:
Point A MAPT Sensor Connector, Harness Side | Point B |
|---|---|
IAT | 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.