VEHICLE CONTROL HISTORY NOTICE: When checking the vehicle control history, make sure to record the output histories. Then, remove the histories and recheck the output histories again. CHECK VEHICLE CONTROL HISTORY (PRE-COLLISION SYSTEM) (a) Connect the Techstream to the DLC3. (b) Turn the power swit
DESCRIPTION When the power switch is turned on (IG), auxiliary battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil of the EFI-MAIN relay, closing the contacts of the EFI-MAIN relay and supplying power to t