200 Quattro Wagon L5-2226cc 2.22L SOHC Turbo (MC) (1989)
Vacuum Vent Valve: Testing and Inspection
Fig. 1 Control Unit Harness Connector Terminal Identification
1.
Turn the ignition switch to the On position.
2.
Touch a jumper wire between control unit harness connector terminal 7 and ground, refer to Fig. 1.
3.
If the vent valve fails to click, replace defective vacuum pump.
4.
If valve clicks, check speed signal.