HN: Turbocharger System HN: Introduction — 2016 workshop reference 5184

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.

◾ damage to vanes on the compressor wheel ◾ out of balance condition ◾ debris in housing

Is a concern present?

Yes	No
INSTALL a new turbocharger assembly. REFER to the Workshop Manual Section 303- 04, Fuel Charging and Controls, Turbocharger. Clear the PCM DTCs. REPEAT the self-test.	GO to HN28 .

Yes

INSTALL a new turbocharger assembly. REFER to the Workshop Manual Section 303- 04, Fuel Charging and Controls, Turbocharger.

Clear the PCM DTCs. REPEAT the self-test.

GO to HN28 .

HN27 CHECK THE WASTEGATE VACUUM SENSOR

• Ignition ON, engine OFF.

• Access the PCM and monitor the WGATE_V (VOLT) PID.

• Record the PID value.

• Disconnect the wastegate vacuum tube from the vacuum port on the turbocharger wastegate vacuum sensor.

• Using a suitable hand pump with gauge, apply 34.47 kPa (5 in-Hg) vacuum to the wastegate vacuum sensor port.

• Record the PID value.

Does the PID value change when vacuum is applied?

Yes	No
A vacuum system leak or restriction is the cause of the concern. DIAGNOSE the vacuum system leak or restriction. REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new Wastegate Vacuum Sensor. REFER to the Workshop Manual Section 303- 14, Electronic Engine Controls. Clear the PCM DTCs. REPEAT the self-test.

Yes

A vacuum system leak or restriction is the cause of the concern. DIAGNOSE the vacuum system leak or restriction. REPAIR as necessary.

Clear the PCM DTCs. REPEAT the self-test.

INSTALL a new Wastegate Vacuum Sensor. REFER to the Workshop Manual Section 303- 14, Electronic Engine Controls.

Clear the PCM DTCs. REPEAT the self-test.

HN28 CHECK FOR CORRECT PCM OPERATION

• Disconnect all the PCM connectors.

• Visually inspect for:

◾ pushed out pins ◾ corrosion

• Connect all the PCM connectors and make sure they seat correctly.

• Carry out the PCM self-test.

• Verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the VID Block for a Replacement PCM.	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

Yes

INSTALL a new PCM.

REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the VID Block for a Replacement PCM.

The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

Source reference 5184

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.