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:
Rear Motor Resolver Circuit
DESCRIPTION The cause of this malfunction may be the rear motor resolver. Check the rear motor resolver internal resistance and connection condition from the inverter to the resolver. Related Parts Check Area Inspection Step Wire harness and connector between the inverter and rear motor r
Dtc Check / Clear
DTC CHECK / CLEAR NOTICE:
The steering lock ECU (steering lock actuator assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the power switch off or clear the DTCs until the DTCs are confirmed and recorded.
DTCs may have been st
