Lexus NX: System Diagram

SYSTEM DIAGRAM

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 How To Proceed With Troubleshooting

PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CONFIRM PROBLEM SYMPTOMS NEXT 3. CUSTOMER PROBLEM ANALYSIS (a) Check if the vehicle has be

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. CHECK AUXILIARY BATTERY (a) Check that the auxiliary battery cables are connected to the correct terminals. HINT: If they are not, connect them properly. (b) Check t

 Networking

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 Vehicle Control History

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

 ECM Power Source Circuit

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

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