Monitor Description

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

The ECM monitors the flow of electrical current through the electronic throttle actuator, and detects malfunctions or open circuits in the throttle actuator based on the value of the electrical current. When the current deviates from the standard values, the ECM concludes that there is a fault in the throttle actuator. Or, if the throttle valve is not functioning properly (for example, stuck ON), the ECM concludes that there is a fault and illuminates the MIL and sets a DTC.

Example:

The ECM determines that the current has deviated from the standard values when one of the following is detected: 1) the current is more than 10 A, or 2) the actuator driving duty ratio exceeds 80% and the current is less than 0.5 A. Then the ECM turns on the MIL and a DTC is set.

This monitor runs after the engine is started, idled for 5 seconds and then quickly revved at a high rpm several times.