Detection Condition

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

If PCM detects any of following conditions, PCM determines that throttle actuator motor circuit has a malfunction.

Fully closed throttle angle detected by each TP sensor No. 1 and No. 2 is one degree or larger than default throttle opening angle.
Difference in default throttle opening angle from fully closed throttle angle detected by TP sensor No. 1 is 1.5 times larger or more than that of No. 2.
Voltage from the ET control relay is too low or too high.
PCM detects large voltage differences from the ET control relay and from the main relay.

This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition during first drive cycle. PENDING CODE is available if PCM detects malfunction condition. FREEZE FRAME DATA is available. DTC is stored in PCM memory.