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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1127: Electronic Throttle Control System (ETCS) Actuator Power Source Circuit Malfunction >> Circuit Description

Circuit Description

After ignition is turned off, battery voltage is still supplied to ECM for the electronic throttle control system. If DTC P1127 is set, ECM shuts down power to throttle control motor and electromagnetic clutch. DTC P1127 is set when open in ETCS actuator power source circuit is detected. Possible causes are:

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