BR–144 BRAKE SYSTEM – TRACTION CONTROL SYSTEM (TRAC) 4 Check ECU–IG fuse. J/B No.1 ECU-IG R07407 P Remove ECU–IG fuse from J/B No. 1. C Check continuity of ECU–IG fuse. OK Continuity OK NG Check for short in all the harness and components connected to ECU–IG fuse. Check for open in harness and connector between TRAC ECU and battery (See page IN–30).