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 | |
READ NEXT:
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
SEE MORE:
Removal
REMOVAL PROCEDURE 1. REMOVE AIR CONDITIONING RADIATOR ASSEMBLY Click here 2. REMOVE QUICK HEATER ASSEMBLY Click here 3. REMOVE COOLER EXPANSION VALVE Click here 4. REMOVE NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY Click here 5. REMOVE NO. 1 COOLER THERMISTOR (a) Remove the No. 1 cooler ther
Checking and replacing fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses
1. Turn the power switch off.
2. Open the fuse box cover.
Engine compartment: type A fuse
box
Push the tab in and lift the lid
