Volkswagen Workshop Service and Repair Manuals

Notes:

• ◆ Idling speed not adjustable.
• ◆ CO content regulated by Lambda control. Faults in Lambda control are detected in self-diagnosis and stored in fault memory.

Test conditions

• ● No faults stored in fault memory
  , interrogating fault memory

• ● Accelerator cable adjustment OK

=> Repair group 20; Removing and installing parts of fuel supply system; Adjusting throttle cable

• ● Exhaust system must be free of leaks
• ● Engine oil temperature min. 80 °C
• ● Electrical consumers switched off (radiator fan must not run during the check)
• ● Ignition timing OK., checking
  => Page 28-9

• ‒ → Connect ignition tester V.A.G 1367 with pick-up clamp V.A.G 1367/8 or ignition tester V.A.G 1767.
• ‒ Start engine and run at idling speed.
• ‒ Check idling speed.
       Specification:
       Engine code AAM: 825...1025 rpm1)
       Engine code ABS: 700... 900 rpm1)

     1)     Up-to-date specifications:

=> "Emission and idling test" binder

If the specification is not attained:

• ‒ Check throttle valve positioner => Page 24-29