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Bulb Circuit

NOTE: If Lexus hand-held tester is not available, begin testing with step 2).
  1. Connect Lexus hand-held tester to Data Link Connector No. 3 (DLC3). With tester in ACTIVE TEST mode, operate appropriate indicator/warning light. If light operation is okay, perform next check listed in appropriate symptom diagnosis table. See TROUBLE SHOOTING . If light operation is not okay, go to next step.
  2. Remove bulb in question. Using DVOM, check for continuity between bulb terminals. If continuity is present, go to next step. If continuity is not present, replace bulb.
  3. Check combination meter circuit plate. See INSTRUMENT CLUSTER  under COMPONENT TESTS. Repair as necessary. If combination meter circuit plate is okay, replace A/C and combination meter integrated ECU. See Figure.
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