Circuit Description

PCM uses 5-volt reference "A" circuit as a sensor feed for EGR valve pintle position, fuel tank pressure (VIN K), MAP, and TP sensors. PCM monitors voltage on this circuit. If PCM senses voltage out of tolerance, DTC P1635 sets.

Conditions required to set DTC are:

• PCM detects an out of tolerance condition on the 5-volt reference "A".
• Condition is present longer than 10 seconds.