1984-1987 Yamaha FJ 1100 / FJ 1200 Factory Service & Repair Manual • P/N LIT-11616-07-98, September 1991 edition

1991 Yamaha FJ1200A/DC Supplementary Service Manual (OEM)

• Official 317-page Yamaha publication (P/N LIT-11616-07-98) covering the 1991 FJ1200A and FJ1200ADC models.
• Details the exact hydraulic and electronic anti-lock brake system architecture for the FJ1200 ABS launch build.
• Contains 47 technical diagrams, wiring schematics, and hydraulic layout charts specific to the 4CR-series engine.
• Available as an instant download so you can access vital specs immediately when a bike hits the lift.
• Fully searchable PDF format to locate any part number or repair reference in seconds.
• Printable letter and A4 format for physical shop use.

System Documentation and Diagnostic Reference

This supplementary manual provides the specialized documentation required to understand the ABS hydraulic control and electronic management systems. For professionals tackling a complex repair, having the exact factory fault code logic (codes 11 through 41) eliminates guesswork and speeds up workshop turnaround times. The publication outlines the function of wheel sensors, sensor rotors, and the primary hydraulic unit. It details diagnostic parameters for identifying system faults, individual sensor testing, and electrical component checks using standard pocket testers. Before initiating any work on hydraulic systems, verify all system pressure is fully relieved to prevent injury or equipment damage. Thorough knowledge of the 4CR-series chassis configurations ensures accurate and safe maintenance.

Specification Highlights

Technical data within this publication establishes the factory baseline for ABS circuit testing. It includes specific parameters for the hydraulic unit solenoid and motor relays. Reference values for front and rear wheel sensor resistance are specified at 1.19–2.21 kΩ at 20°C (68°F). The hydraulic unit solenoid resistance must measure at less than 10 Ω. Precise chassis hardware torque values are also documented, including brake caliper bolts at 35 Nm (25 ft-lb) and front wheel axle bolts at 59 Nm (43 ft-lb). These specifications deliver the exact diagnostic thresholds needed to evaluate component health accurately.