Circuit Description
WARNING: This page is about a different car, the 2000 Isuzu Rodeo and 2000 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors 5 volt reference signal when ignition is on. If PCM senses an analog to digital (A/D) conversion error within PCM, DTC P1627 will be set.