BE–193 BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM ECU Power Source Circuit CIRCUIT DESCRIPTION The ECU power source supplies power to the actuator and sensors, etc. Terminal GND and the cruise control ECU case are grounded. WIRING DIAGRAM Ignition Switch J/B No.1 ECU-IG Cruise Control ECU 4 4 1B ←→ 1J W B-Y 5 9 B-R B 7 4 1J ←→ 1I 14 AM1 2 2 ALT 2 2A Battery 1 13 1J ←→ 1H W-B GND 13 W-B N12781 INSPECTION PROCEDURE 1 Check ECU–IG fuse. J/B No.1 ECU-IG Fuse N08843 P Remove ECU–IG fuse from J/B No.1. OK Check continuity of ECU–IG fuse. OK Continuity OK NG Check for short in all the harness and components connected to the ECU–IG fuse (See attached wiring diagram).