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Testing auxiliary signals > < Checking intake manifold change-over valve

A4 Mk1

Simos injection and ignition system (4-cylinder)
Testing intake manifold change-over function
Removing and installing parts of intake manifold change-over
 
N24-0862
  • Intake manifold
  • Seal
    • ◆ Renew if damaged
  • Change-over barrel
  • Spring
  • Vacuum control element
  • 10 Nm
  • Cover
  • Intake manifold change-over valve (N156)
    • ◆ Resistance: 25...35 ω
 
N24-0862
  • Non-return valve
    • ◆ Installation position: Grey side faces intake manifold
  • Rubber grommet

Testing auxiliary signals > < Checking intake manifold change-over valve