Lexus NX: Problem Symptoms Table
Lexus NX Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Access System With Push-button Start (for Start Function) / Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to the system before inspecting the suspected areas below.
- If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
- If a malfunction occurred after optional components were installed, check if the components are causing wave interference.
| Symptom | Suspected Area | Link |
|---|---|---|
| Power source mode does not change to on (IG) or on (ACC) | Refer to "Power Source Mode does not Change to ON (IG and ACC)" | |
| Power source mode does not change to on (IG) | Refer to "Power Source Mode does not Change to ON (IG)" | |
| Power source mode does not change to on (ACC) | Refer to "Power Source Mode does not Change to ON (ACC)" | |
| Power source mode does not change to on (READY) | Refer to "Power Source Mode does not Change to ON (READY)" | |
| Hybrid control system cannot be started by remote engine start and stop (Both the wireless door lock control system and push-button start function operate normally)* | Refer to "Remote Engine Starter does not Operate" | |
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- *: w/ Lexus Enform Remote
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Terminals Of Ecu
TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the I51 and I53 certification ECU (smart key ECU assembly) connectors. (b) Measure the voltage and resistance accordin
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Smart access system with push-button start (for Start Function) data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the ve
Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When using the Techstream with the 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
SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the LEXUS ENFORM system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CHECK THE CUSTOMER'S CONTRACT STATUS (a) Check if the satellite radio and LEXUS ENFORM
Components
COMPONENTS ILLUSTRATION *1 BLOWER ASSEMBLY - - ILLUSTRATION *1 AIR FILTER CASE *2 AIR REFINER ELEMENT *3 BLOWER WITH FAN MOTOR SUB-ASSEMBLY *4 NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY
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