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Cold Start Injector Time Switch

  1. Unplug cold start injector time switch connector. For cold start injector time switch location, See Fig 1.
    Fig 1: Cold Start Injector Time Switch Location
    G118505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using ohmmeter, check resistance between terminals "STA" & "STJ" at appropriate temperature. See Fig 2. See COLD START INJECTOR TIME SWITCH SPECIFICATIONS table. There should be continuity between terminal "STA" and ground. Replace switch if not within specification.
NOTE: "STA" terminal is fed current from ignition switch during cranking. "STJ" goes to cold start injector.
TIME SWITCH SPECIFICATIONS

Ohms Condition
20-40 Below 86°F (30°C)
40-60 Above 104°F (40°C)
20-80 "STA" To Ground
Fig 2: Checking Typical Cold Start Injector Time Switch
G118937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002