Notes on Intermittents

With key on, engine off, manipulate wiring and connectors while observing ECM Input EI78. If EI78 cycles to "LO" at any time, repair intermittent open.

Review snapshot data parameters stored with this code to verify failure. If failure is verified, check and repair intermittent wiring connections or sensor.

Fig 1: ECM Input Code EI78, Power Steering Pressure Switch Circuit

Fig 2: ECM Input Code EI78, Power Steering Pressure Switch Circuit