Possible Causes

Malfunction is detected when:

1. Electric throttle control feedback function does not operate properly. When malfunction "A" is detected, ECM enters fail-safe mode and MIL lights up.
2. An excessively high current flows through throttle control motor to ECM.

When in fail-safe mode, ECM stops electric throttle control actuator control, and throttle valve is maintained at a fixed opening (about 5 degrees) by the return spring. When the accelerator pedal depressed value reaches a throttle opening of 30 degrees or more, the throttle valve opens to a maximum of 20 degrees by the accelerator wire.

Possible causes are:

• Throttle control motor circuit open or shorted.
• Defective electric throttle control actuator.