Throttle position sensor failure compensation Toyota Camry 2001 - 2006

The throttle position sensor includes two (main auxiliary) sensor circuits. In the event of a malfunction in any of the sensor circuits, the engine electronic control unit detects the difference in signal voltages in these two circuits, turns off the current to the throttle actuator motor and switches to emergency operation. Then, under the action of the force of the return spring, the throttle valve returns to the set position and remains in this position. In this case, the vehicle can drive in emergency mode, and the engine power is controlled by controlling the fuel injection and setting the ignition timing in accordance with the opening angle of the accelerator.

A similar control algorithm is used if the engine ECM detects a malfunction in the throttle motor system.

Throttle Position Sensor Failure Compensation Mode:

1 – sensor of position of a pedal of management of giving of fuel;

2 - main;

3 - additional;

4 - electronic engine control unit;

5 - fuel injectors;

6 - ignition coil.

Source: http://carmanz.com/toyota/camry-2001-2006/230982-tc2001434.html