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.