Checking Initial Boost Pressure Servo (Wastegate) Setting
CHECKING INITIAL BOOST PRESSURE SERVO (WASTEGATE) SETTINGCondition
- Diagnostic Trouble Codes (DTCs) in Motronic 4.4 absent.
- Diagnostic trouble codes (DTCs) in AW 50-42 absent.
- Engine at normal operating temperature.
- The fault is permanent.
Possible Source
- boost Pressure Control (BPC) Valve open.
Checking Basic Adjustment of Boost Pressure Control Valve Pressure Servo
- Check initial setting of boost pressure control (BPC) valve pressure servo.
Was the initial setting of the pressure servo OK?
Yes:
- Proceed to Checking Engine Coolant Temperature Sensor section.
No:
- Adjust or Replace boost pressure servo.