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Home >> Lexus >> 1995 >> SC 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Back Up Power Source Circuit
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Back Up Power Source Circuit

CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even if the ignition switch is off, for use by the diagnostic trouble code memory and air-fuel ratio adaptive control value memory etc.





DIAGNOSTIC CHART





WIRING DIAGRAM











INSPECTION PROCEDURE
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