Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to the Smart Access System with Push-button Start (for Entry Function).
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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 this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Driver side seat belt warning light does not operate | Proceed to "Driver Side Seat Belt Warning Light does not Operate" | |
| Front passenger side seat belt warning light does not operate | Proceed to "Front Passenger Side Seat Belt Warning Light Malfunction" | |
| Rear seat belt warning light malfunction | Proceed to "Rear Seat Belt Warning Light Malfunction" | |
| Driver and front passenger seat belt warning light does not operate | Airbag ECU assembly | |
| Combination meter assembly | | |
| Seat belt warning buzzer does not sound | Check customized settings using the Techstream | |
| Meter / Gauge System | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK COMBINATION METER ASSEMBLY (a) Disconnect the I10 combination meter assembly connector. (b) Measure the resistance and voltage according to the value(s) in the table below.
Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage. Standard voltage: 11 to 14 V (power switch off) If the vo
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the power mirror control system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS CHECK HINT:
In troubleshooting, confirm that the
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (a) w/o Auto Wiper System: Check the front wiper intermittent operation. (1) Connect a voltmeter positive (+) lead to terminal I125-3 (+1) and a negative (-) lead to terminal I124-4 (EW). *a Component with
