Volkswagen Workshop Service and Repair Manuals

Notes:

• ◆ The control of the exhaust gas recirculation system is undertaken by diesel direct injection system control unit (J248) via EGR valve (N18) (electric) to exhaust gas recirculation valve (mechanical).
• ◆ Checking exhaust gas recirculation valve (N18).

=> Repair group 01; Self-diagnosis; Final control diagnosis

• ◆ The cone-shaped plunger in the mechanical exhaust gas recirculation valve ensures that various cross sectional openings are possible at different plunger lifts.
• ◆ Pulsed control makes every conceivable valve position possible.
• ◆ Renew self-locking nuts.