Diagnostic Aids

A PSP switch that will not close, or a loss of ground at PSP switch may cause engine to stall when power steering loads are high. A switch that will not open or a signal line shorted to ground may affect idle quality.

An intermittent condition may be caused by a poor connection, rubbed-through insulation, or a broken wire inside insulation. Check PCM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal-to-wire connections before component replacement.