Inspection and Verification

NOTE: This article provides mechanical diagnosis of the turbocharger assembly. If there is a Malfunction Indicator Lamp (MIL) illuminated, or Diagnostic Trouble Codes (DTCs) are present, these should be diagnosed prior to performing turbocharger mechanical diagnosis.

1.

For PCM Diagnostic Trouble Codes (DTCs), REFER to: Electronic Engine Controls . See MIL Code List. For driveability symptoms without Diagnostic Trouble Codes (DTCs), Refer to Engine Controls - Symptom Charts (Except Diesel & Hybrid) .

2.

Verify the customer concern.

3.

Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical	Electrical
Oil leak(s) Coolant leak(s) Wastegate actuator Wastegate actuator vacuum hose(s) Wastegate valve Turbocharger housing Air Cleaner (ACL) element Air Cleaner (ACL) outlet pipe Air Cleaner (ACL) intake pipe Turbocharger intake tube Charge Air Cooler (CAC) Charge Air Cooler (CAC) intake pipe Charge Air Cooler (CAC) outlet pipe Turbocharger oil supply tube Turbocharger oil return tube Turbocharger coolant supply tube Turbocharger coolant return tube	Wiring harness(es) Electrical connector(s) Turbocharger control valve PCM

Mechanical

Electrical

Oil leak(s)
Coolant leak(s)
Wastegate actuator
Wastegate actuator vacuum hose(s)
Wastegate valve
Turbocharger housing
Air Cleaner (ACL) element
Air Cleaner (ACL) outlet pipe
Air Cleaner (ACL) intake pipe
Turbocharger intake tube
Charge Air Cooler (CAC)
Charge Air Cooler (CAC) intake pipe
Charge Air Cooler (CAC) outlet pipe
Turbocharger oil supply tube
Turbocharger oil return tube
Turbocharger coolant supply tube
Turbocharger coolant return tube

Wiring harness(es)
Electrical connector(s)
Turbocharger control valve
PCM

4.

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

5.

If the concern is not visually evident, verify the symptom and refer to the Diagnostic Tab in the Ford diagnostic equipment.