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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Power Mirrors >> Circuit Tests >> Rear View Mirror Electro Chromic Circuit >> GS300, GS400, LS400, Lx470, RX300, SC300 & SC400

GS300, GS400, LS400, Lx470, RX300, SC300 & SC400

  1. Remove rear view mirror. Check for continuity between rear view mirror switch connector terminal No. 4 and ground. See WIRING DIAGRAMS . If continuity exists, go to next step. If continuity does not exist, repair wiring harness as necessary.
  2. Measure voltage between rear view mirror switch connector terminal No. 1 and ground. With ignition switch in LOCK or ACC position, voltage should not exist. With ignition switch in ON position, battery voltage should exist. If voltage is not as specified, repair wiring harness as necessary. If voltage is as specified, check rear view mirror electrochromic. See ELECTROCHROMIC REAR VIEW MIRROR  under COMPONENT TESTS.
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