Lexus NX: Precaution
PRECAUTION
PRECAUTIONS WHEN USING TECHSTREAM
(a) When using the Techstream with the vehicle power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
(b) After all DTCs are cleared, check if the malfunction occurs again 6 seconds after the power switch is turned to on (IG).
PRECAUTION WHEN REPLACING CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
(a) Before replacing the certification ECU (smart key ECU assembly), refer to the Smart Access System with Push-button Start (for Entry Function).
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PRECAUTION WHEN REPLACING DOOR CONTROL RECEIVER
(a) When replacing the door control receiver, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the Techstream and write them down before removal.
(b) It is necessary to perform initialization ( ) after registration ( ) of the transmitter IDs into the door control receiver if the door control receiver has been replaced.
PRECAUTION WHEN REPLACING MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) If the main body ECU (multiplex network body ECU) is replaced, refer to the Smart Access System with Push-button Start (for Entry Function).
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DOOR CONTROL RECEIVER EXPRESSIONS
(a) The type of door control receiver used on this model differs depending on the specifications of the vehicles. The expressions listed in the table below are used in this section.
| Part Name in Manual | Actual Part Name |
|---|---|
| Door control receiver | Electrical key & TPMS receiver assembly |
PRECAUTIONS FOR ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY
(a) The electrical key transmitter sub-assembly is a precision instrument. Be sure to observe the following:
(1) Do not subject the electrical key transmitter sub-assembly to strong physical shocks.
(2) Do not keep the electrical key transmitter sub-assembly in a high temperature area for a long time.
(3) Do not use an ultrasonic washing machine to clean the electrical key transmitter sub-assembly.
(4) Do not use the electrical key transmitter sub-assembly near any magnets or magnetized items.
(5) Do not place the electrical key transmitter sub-assembly near magnetic equipment, such as digital audio players, induction cookers, medical devices that generate low-frequency electromagnetic waves, etc.
(6) Do not attach any stickers to the electrical key transmitter sub-assembly.
(7) Do not disassemble the electrical key transmitter sub-assemblies.
(8) The mechanical key should only be used in an emergency, such as when the transmitter battery is depleted.
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Parts Location
PARTS LOCATION ILLUSTRATION *1 ENGINE ROOM RELAY BLOCK
- AM2 FUSE
*2 WIRELESS DOOR LOCK BUZZER *3 DOOR CONTROL RECEIVER - - ILLUSTRATION *A w/o Power Back Door Syste
System Diagram
SYSTEM DIAGRAM Wireless Door Lock Control System
System Description
SYSTEM DESCRIPTION WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system can be used to lock and unlock all doors from a distance. The system is controlled by an electrical key trans
SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the automatic headlight beam level control system (for Triple Beam Headlight).
*: Use the Techstream
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS AND SYMPTO
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
When replacing the combination meter assembly, always replace it with
