Vacuum Pump: Testing and Inspection

Fig. 1 Control Unit Harness Connector Terminal Identification:

1. Turn ignition switch to the On position.
2. Connect a jumper wire between control unit harness connector terminal 4 and ground, refer to Fig. 1.
3. If the pump does not run, replace defective vacuum pump.
4. If the pump runs, refer to VACUUM PUMP VENT VALVE CHECK.