Audi Workshop Service and Repair Manuals

Test requirements:

• ● Coolant temperature at least 80 °C.

Test sequence

• ‒ → Disconnect electrical connector at boost pressure limitation solenoid valve -N75 -Item 2-.

• ‒ → Start engine and run to maximum engine speed by sharply depressing accelerator.
• ‒ The boost pressure control valve actuating rod -2- must move

If the actuating rod does not move:

• ‒ Check boost pressure valve lever -1- for ease of operation. If rusted in place, replace turbocharger.

If actuating rod does not move despite ease of operation of lever:

• ‒ Replace boost pressure control valve pressure unit -3- .
• ‒ Erase fault memory.

=> Diesel Direct Injection and Glow Plug System (4-cyl TDI) > 07.99; Repair group 01; Self-diagnosis; Interrogating fault memory

=> TDI Injection and Glow Plug System (4-cyl.) 08.99 >; Repair group 01; Self-diagnosis; Interrogating fault memory

Note:

Disconnecting boost pressure limitation solenoid valve electrical connection -N75 caused a fault code to be set in the fault memory during the previous testing procedure.