Test Description
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers in the diagnostic procedures.
- 6 - This step simulates Pulse Width Modulated (PWM) signal supplied to IAC valve by PCM by rapidly grounding and un-grounding terminal No. 1 of IAC valve.
- 8 - The most likely cause of no power is an open circuit condition between IAC valve connector terminal No. 2 and splice. A shorted or inoperative EFI relay circuit will cause a no-start condition.