SR-90 STEERING — Power Steering (Progressive Power Steering) Progressive Power Steering (PPS) ELECTRONIC CIRCUIT Do not open the cover or the case of the ECU and various computer unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.) Gear Housing Flow Dividing Valve Power Steering Pump Hydraulic Reaction Chamber Speed Sensor ECU Solenoid Valve Ignition Switch Fuse (ECU-IG) ECU +B Fusible Link SPD Solenoid Valve Speed Sensor SOL ⊕ Battery SOL ⊖ GND +B SQL ⊕ SPD GND SOL ⊖ SR94433