BR–151 BRAKE SYSTEM – TRACTION CONTROL SYSTEM (TRAC) 3 Check for open and short in harness and connector between terminal IDL1 of TRAC ECU and main throttle position sensor with TRAC ECU, ECM and main throttle position sensor connectors disconnected (See page IN–30). OK NG Repair or replace harness or connector. 4 Check for short in harness between terminal IDL1 of TRAC ECU and body ground with only main throttle position sensor connector connected (See page IN–30). OK NG Check and replace main throttle position sensor. 5 Check for short in harness between terminal IDL1 of TRAC ECU and body ground with only ECM connector connected (See page IN–30). OK NG Check and replace ECM. Check and replace TRAC ECU. 6 Check voltage of terminal VTA1 of ECM (See page EG–554). NG OK Check and replace ECM. 7 Check for open and short in harness and connector between terminal VTA1 of ECM and main throttle position sensor (See page IN–30). OK NG Repair or replace harness or connector. 8 Check main throttle position sensor (See page EG–555). OK NG Adjust or replace main throttle position sensor See page EG–292). Check and replace ECM.