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Home >> Toyota >> 2004 >> Matrix XRS >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Engine Control System Self-Diagnostics) >> Diagnostic Tests >> DTC P1127: Electronic Throttle Control System Actuator Power Source Circuit >> Circuit Description
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Circuit Description

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

Battery voltage is supplied to +BM circuit at ECM as the power source for the Electronic Throttle Control System (ETCS). DTC is set if battery voltage does not exist on +BM circuit at ECM for ETCS. If DTC P1127 exists, ECM will turn off the power to throttle control motor and throttle valve is closed by the return spring. When this occurs, throttle valve is controlled by throttle cable connected to accelerator pedal. Possible causes are:

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