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TCM Self-Diagnostic Procedure: Preparation

WARNING: This page is about a different car, the 2002 Nissan Sentra, 2002 Infiniti G20, 2001 Nissan Sentra, and 2001 Infiniti G20. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to OFF position. Connect vacuum pump to throttle opener and apply 7.48 in. Hg. vacuum. See Fig 1.
  2. Disconnect throttle position switch harness connector. Turn ignition on.
  3. Check continuity of closed throttle position switch. See Fig 2. Continuity should exist. If continuity exists, see JUDGEMENT PROCEDURE . If continuity does not exist, check throttle opener and closed throttle position switch, then increase vacuum until closed throttle position switch shows continuity.
Fig 1: Applying Vacuum To Throttle Opener
G00120913Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Checking Closed Throttle Position Switch Continuity
G00120914Courtesy of NISSAN MOTOR CO., U.S.A.
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