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Vacuum Switch

Remove Green-striped vacuum hose from device box. Connect vacuum pump to device box nipple. Disconnect vacuum switch connector. Apply vacuum and check for continuity between switch terminals No. 1 and No. 4 on Montero and Pickup. See Fig 1 . On all other models, check for continuity between switch terminals. At 7.7 In. Hg, there should be no continuity. At 11.9 In. Hg, there should be continuity.

Fig 1: View of Vacuum Switch Connector
G61359Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.