Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
Click here .gif)
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.
-
If the auxiliary battery voltage becomes low, rear mirror heater operation is canceled to prioritize supplying power to the power steering system.
for Manual Tilt and Manual Telescopic Steering Column: Click here
for Power Tilt and Power Telescopic Steering Column: Click here
| Symptom | Suspected Area | Link |
|---|---|---|
| Driver side power mirror cannot be adjusted with power mirror switch | Proceed to "Driver Side Power Mirror cannot be Adjusted with Power Mirror Switch" | |
| Front passenger side power mirror cannot be adjusted with power mirror switch | Proceed to "Front Passenger Side Power Mirror cannot be Adjusted with Power Mirror Switch" | |
| Power mirror cannot be adjusted with power mirror switch | Proceed to "Power Mirror cannot be Adjusted with Power Mirror Switch" | |
| Mirror heater does not operate with rear defogger switch | Proceed to "Mirror Heater does not Operate with Rear Defogger Switch" | |
| Mirror heater, rear window defogger and windshield deicer do not operate* | Power steering system (for Manual Tilt and Manual Telescopic Steering Column) | |
| Power steering system (for Power Tilt and Power Telescopic Steering Column) | | |
| Power retract mirrors do not operate with power retract mirror switch | Proceed to "Power Retract Mirrors do not Operate with Power Retract Mirror Switch" | |
| AUTO power retract mirrors do not operate | Proceed to "AUTO Power Retract Mirrors do not operate" | |
| Position memorization or recall of a memorized position is not possible | Proceed to "Power Mirror Surface Position is not Memorized" | |
| Reverse shift-linked function of power mirrors does not operate | Proceed to "Reverse Shift-linked Function of Power Mirrors does not Operate" | |
| Reverse shift-linked function of power mirrors does not return | Main body ECU (Multiplex network body ECU) | |
| Driver side reverse shift-linked function of power mirrors does not return | Outer rear view mirror assembly LH | |
| Outer mirror control ECU assembly LH | | |
| Front passenger side reverse shift-linked function of power mirrors does not return | Outer rear view mirror assembly RH | |
| Outer mirror control ECU assembly RH | | |
| Memorization of the reverse shift-linked mirror position is not possible | Outer mirror control ECU assembly LH | |
| Outer mirror control ECU assembly RH | | |
| Wireless transmitter memory function does not operate | Smart access system with push-button start (for Entry Function) | |
| Power door lock control system | | |
| Front power seat control system | | |
| Main body ECU (Multiplex network body ECU) | | |
| Wireless-linked return function does not operate | Smart access system with push-button start (for Entry Function) | |
| Wireless door lock control system | | |
| Front power seat control system | | |
| Main body ECU (Multiplex network body ECU) | | |
| Automatic glare-resistant EC mirror does not operate | Inner rear view mirror assembly | |
| Outer mirror LH | | |
| Outer mirror RH | | |
| Outer mirror retractor LH | | |
| Outer mirror retractor RH | | |
| Outer mirror control ECU assembly LH | | |
| Outer mirror control ECU assembly RH | | |
| Harness or connector | - |
- *: w/ Windshield Deicer System
READ NEXT:
Terminals Of Ecu
TERMINALS OF ECU CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH (a) Disconnect the M5 ECU connector. (b) Measure the voltage and resistance according to the value(s) in the table below. Tester Connect
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. Th
Driver Side Power Mirror cannot be Adjusted with Power Mirror Switch
DESCRIPTION When the outer mirror switch assembly mirror surface adjust switch (up/down/left/right) is operated, up/down/left/right signals are received by the main body ECU (multiplex network body EC
SEE MORE:
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 conditioning control assembly. (c) When the vehicle is stopped, confirm that the rear window defogger stops aft
Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: When checking the vehicle control history, make sure to record the output histories. Then, remove the histories and recheck the output histories again. CHECK VEHICLE CONTROL HISTORY (PRE-COLLISION SYSTEM) (a) Connect the Techstream to the DLC3. (b) Turn the power swit
