LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2004 >> IS 300 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1127: Electronic Throttle Control System (ETCS) Actuator Power Source Circuit Malfunction >> Circuit Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit Description

WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

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

scientia non olet · About LEMON Manuals