This manual investigates the diagnostic procedures and operational parameters required to maintain the Toyota 3S-FE engine within the computer-controlled systems of 1987 Celica and Camry models. The Toyota Motor Corporation provides this technical documentation to assist mechanics and technicians in identifying faults within the electronic fuel injection and ignition timing systems. The text utilizes a structured framework of flowcharts, electrical diagrams, and error code interpretations to ensure precise engine performance and emissions compliance.

Technicians and automotive historians regard this document as a foundational reference for early electronic fuel injection systems in Japanese vehicles. Readers frequently note the technical density of the prose and the necessity of specialized diagnostic equipment to implement the procedures described.