Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
- Use the following procedure to troubleshoot the window defogger system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
-
The following 5 items are important points for problem analysis:
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions?
Driving conditions, weather conditions
How did it happen?
Problem symptoms
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 4. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here .gif)
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table. | A |
| Fault is listed in Problem Symptoms Table. | B |
| B | .gif) | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
| 5. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check
Click here
(b) Terminals of ECU
Click here
(c) Data List / Active Test
Click here
|
| 6. | REPAIR OR REPLACE |
(a) Repair or replace as necessary.
|
| 7. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK WINDOW DEFOGGER SYSTEM (a) Turn the power switch on (IG). (b) Check that the rear window defogger becomes warm by operating the rear window defogger switch of the air conditionin
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: If the auxiliary battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system. for Power Tilt and Powe
Data List / Active Test
DATA LIST / ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspe
SEE MORE:
Parts Location
PARTS LOCATION ILLUSTRATION *1 NO. 2 COMBINATION SWITCH ASSEMBLY - STEERING HEATER SWITCH *2 STEERING WHEEL ASSEMBLY - STEERING WHEEL HEATER UNIT *3 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-IG NO. 2 FUSE - ECU-IG NO. 3 FUSE *4 STEERING VIBRATION AND HEATER ECU *5 SPIR
Headlight switch
The headlights can be operated
manually or automatically.
Operating the switch turns on
the lights as follows:
Type A
The side marker, parking,
tail, license plate, instrument panel
lights, and daytime running lights turn on.
The headlights and all the
lights listed abov
