Measure the Boost Pressure
Drive at approx. 1800 r/min in 2nd gear.
Fully depress the accelerator pedal.
Apply the brakes while depressing the accelerator pedal at an engine speed of max. 5500 r/min so that full boost is obtained.
Full boost should be between 1800-5500 r/min.
Important: Do not brake for longer than 5 seconds, otherwise serious damage may be caused to the braking system.
Check the boost pressure and basic boost pressure values at full load.
| Measured at full load | Turbo control valve connector connected: Boost Pressure | Turbo control valve connector disconnected: Basic Boost Pressure |
| B4194T2 HP manual (kPa) | 90 - 100 | 40 - 60 |
| B4194T2 HP automatic (kPa) | 50 - 60 | 20 - 30 |
| B4204T2 LP automatic/manual (kPa) | 50 - 60 | 20 - 30 |
If the test values differ from the above values, adjust the boost pressure control (BPC) valve see Checking And Adjusting the Boost Pressure Control (BPC) Valve On the Turbocharger (TC)