Intake Flap Vacuum Actuator, Checking

Intake Flap Vacuum Actuator, Checking

Only perform test if there were complaints about reduced torque, elasticity or engine power.

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAS 6213)

Work procedure

- Start engine.

- Accelerate abruptly and observe linkage on back side of vacuum actuator when doing so.

• Linkage must move - arrow -.





- If linkage on vacuum actuator does not move, check the following:

• Vacuum system for leaks,

• Change over mechanism linkage for ease of movement,

• Vacuum hoses for correct connection,

• Vacuum hoses for leaks.

- If no malfunctions are found, remove vacuum hose on vacuum actuator.





- Connect hand vacuum pump (VAS 6213) to vacuum actuator connector - arrow - as shown in illustration.

- With hand vacuum pump, create vacuum and observe vacuum actuator linkage.





• Linkage must move - arrow -.

- Vent hand vacuum pump.

• Linkage must move back into output position.

• Check linkage movement sequence over entire adjustment range: it must move continuously without jerking.

- If linkage on vacuum actuator does not move or moves jerkily, replace actuator.