Car wiring diagrams: Ford Pip Circuit Failure, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Spark Angle Word SAW circuit failure L SFI O No Vehicle Power pins or bad PCM VPWR Diagnosis R Erratic idle during test reset throttle .Ford OBD I trouble codes, how to retrieve them, and repair them without the need of high priced OBD I Scan Tools.EEC IV. CContinuous memory code. OKey On, engine Off self test code. REngine running self test code..