DTC P0506 Or DTC P0507: Idle Control System/Idle Air Control Motor Circuit: Operation
The IAC motor power is supplied from the MFI relay terminal No. 1. The PCM terminals No. 14, 15, 28 and 29 drives the stepper motor by sequentially turning on the power transistors in the PCM and providing ground to the IAC motor terminals No. 1, 3, 4 and 6. See Fig 1 .