Audi Workshop Service and Repair Manuals

• ‒ Read measured value block, Display Group 25, engine at idling speed =>Page 01-49.

• ‒ Perform a test drive at full load at approx. 4000 rpm.

• Specified result: 5...95 %

If the specified result is not achieved, change the engine speed until the signal ratio is within the specified range.

• Specified result: 3.00...8.00 ms

• Specified result: Agreement with corrected specified engine load in display zone 2 (tolerance ± 0.50 ms)

If the actual engine load is outside the tolerance, this may be due to one of the following faults:

• ◆ Electrical fault in solenoid valve for the boost pressure control.
• ◆ Charge pressure control hoses disconnected, leaking or blocked.
• ◆ -N75 solenoid valve for boost pressure control blocked.
• ◆ Leak between turbocharger and intake manifold.
• ◆ Actuation mechanism (linkage, shaft) for the by-pass valve stiff or jamming.
• ◆ Turbocharger defective (turbine jammed by foreign body).