B-MAX 2012 – Fuel Charging and Controls – Turbocharger – 1.0L EcoBoost (74kW/100PS)/1.0L EcoBoost (90kW/120PS)/1.0L EcoBoost (103kW/140PS) (YY) – Turbocharger – Visual Inspection Chart

Fuel Charging and Controls - Turbocharger - 1.0L EcoBoost (74kW/100PS)/1.0L EcoBoost (90kW/120PS)/1.0L EcoBoost (103kW/140PS) (YY) - TurbochargerB-MAX 2012.75 (01/2012-)
Diagnosis and Testing

General Equipment
Ford diagnostic equipment

Principles of Operation

The turbocharger is governed by a vacuum actuator. The vacuum actuator controls the wastegate control valve which redirects some of the exhaust gas past the turbine and therefore acts as a governor. The vacuum actuator is preset during manufacture and must not be tampered with.

The intake air system is fitted with a turbocharger bypass valve. This vents the intake air system when the throttle is closed and recirculates the air back into the intake air system. It also releases pressure on the turbocharger which will reduce turbo lag and improve acceleration and increase engine performance.

The turbocharger housing is both water and oil cooled. The oil supply also lubricates the turbocharger bearings.

Inspection and Verification

NOTE: It is normal for a small amount of combustion gas to pass into the crankcase. This gas is scavenged into the air intake system through the positive crankcase ventilation (PCV) system, which incorporates an crankcase vent oil separator. Some engine oil, in the form of a vapor is carried into the air intake system with the blow-by gases (this engine oil also contributes to valve seat durability). This means that oil will collect inside the air intake components and the turbocharger. This is not an indication that the turbocharger oil seal has failed. The turbocharger oil seal will not fail unless the bearings fail first, which will cause the turbocharger to become noisy or seize. Do not install a new turbocharger due to oil inside the turbocharger or the air intake components. If a leak is detected in the oil supply or return tubes or connections, locate and rectify the source. Do not install a new turbocharger due to an oil leak.

  1. Verify the customer concern.

  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

MechanicalElectrical
  • Oil leak(s)
  • Coolant leak(s)
  • Wastegate actuator
  • Wastegate actuator vacuum hose(s)
  • Wastegate control valve
  • Turbocharger housing
  • Air cleaner element
  • Air cleaner outlet pipe
  • Air cleaner intake pipe
  • Turbocharger intake tube
  • Charge air cooler
  • Charge air cooler intake pipe
  • Charge air cooler 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
  • Powertrain control module (PCM)

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

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

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