Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the wiper and washer system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | INSPECT AUXILIARY BATTERY |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
HINT:
- A simple method to determine whether the auxiliary battery is discharged is to operate the horn.
- If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
(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.
|
| 3. | CHECK VEHICLE TYPE |
(a) Check the vehicle type.
| Result | Proceed to |
|---|---|
| w/ Rain Sensor | A |
| w/o Rain Sensor | B |
| B | .gif) | GO TO STEP 5 |
|
| 4. | CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the LIN communication system is functioning normally.
Click here .gif)
| Result | Proceed to |
|---|---|
| DTC is not output | A |
| DTC is output | B |
| B | | GO TO LIN COMMUNICATION SYSTEM |
|
| 5. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table | A |
| Fault is listed in Problem Symptoms Table | B |
| B | | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
(c) Inspection
(1) Windshield wiper motor assembly
Click here
(2) Rear wiper motor assembly
Click here
(3) Windshield wiper switch assembly
Click here
(4) Windshield washer motor and pump assembly
Click here
(5) Level warning switch assembly
Click here
(6) Map light assembly (w/ Rain Sensor)
Click here
(d) On-vehicle inspection
(1) Windshield wiper motor assembly
Click here
(2) Rear wiper motor assembly
Click here
(3) Windshield wiper switch assembly
Click here
(4) Rain sensor (w/ Rain Sensor)
Click here
(5) Headlight cleaner control relay (w/ Headlight Cleaner System, for Triple Beam Headlight)
Click here
(6) Headlight cleaner control relay (w/ Headlight Cleaner System, for Single Beam Headlight)
Click here
|
| 7. | ADJUST, REPAIR OR REPLACE |
|
| 8. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
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 repla
Terminals Of Ecu
TERMINALS OF ECU CHECK WINDSHIELD WIPER RELAY ASSEMBLY (w/ Rain Sensor) (a) Disconnect the I56 windshield wiper relay assembly connector. (b) Measure the voltage and resistance according to the value
Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION (w/ Rain Sensor) (a) When the windshield wiper switch assembly is in the AUTO position and any of the following conditions are met, intermittent operation according
SEE MORE:
System Diagram
SYSTEM DIAGRAM FRONT WIPER AND WASHER SYSTEM (w/ Rain Sensor) FRONT WIPER AND WASHER SYSTEM (w/o Rain Sensor) REAR WIPER AND WASHER SYSTEM HEADLIGHT CLEANER SYSTEM (w/ Headlight Cleaner System, for Triple Beam Headlight) HEADLIGHT CLEANER SYSTEM (w/ Headlight Cleaner System, for Single Beam Hea
Security Indicator Light Does not Blink
DESCRIPTION
The certification ECU (smart key ECU assembly) blinks the security indicator light (air conditioning control assembly) when the immobiliser is set (power switch off, or driver door is opened and closed with power switch on (IG)).
The certification ECU (smart key ECU assembly) receiv
