Possible Causes
WARNING: This page is about a different car, the 2002 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction is detected when:
- Electric throttle control feedback function does not operate properly. When malfunction "A" is detected, ECM enters fail-safe mode and MIL lights up.
- 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.