Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
- When the electrical key transmitter sub-assembly is brought near the door control receiver (RF band), door outside handle (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
- 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 |
|---|---|---|
| Entry interior alarm does not sound | Proceed to "Entry Interior Alarm does not Sound" | |
| Entry exterior alarm and answer-back buzzer do not sound | Proceed to "Entry Exterior Alarm and Answer-back Buzzer do not Sound" | |
| All door entry lock/unlock functions and wireless functions do not operate | Proceed to "All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate" | |
| All door entry lock/unlock functions do not operate, but wireless functions operate | Proceed to "All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate" | |
| Driver side door entry unlock function does not operate | Proceed to "Driver Side Door Entry Unlock Function does not Operate" | |
| Front passenger side door entry unlock function does not operate | Proceed to "Front Passenger Side Door Entry Unlock Function does not Operate" | |
| Rear door LH entry unlock function does not operate | Proceed to "Rear Door LH Entry Unlock Function does not Operate" | |
| Rear door RH entry unlock function does not operate | Proceed to "Rear Door RH Entry Unlock Function does not Operate" | |
| Driver side door entry lock and unlock functions do not operate | Proceed to "Driver Side Door Entry Lock and Unlock Functions do not Operate" | |
| Front passenger side door entry lock and unlock functions do not operate | Proceed to "Front Passenger Side Door Entry Lock and Unlock Functions do not Operate" | |
| Rear door LH entry lock and unlock functions do not operate | Proceed to "Rear Door LH Entry Lock and Unlock Functions do not Operate" | |
| Rear door RH entry lock and unlock functions do not operate | Proceed to "Rear Door RH Entry Lock and Unlock Functions do not Operate" | |
| Driver side door entry lock function does not operate | Proceed to "Driver Side Door Entry Lock Function does not Operate" | |
| Front passenger side door entry lock function does not operate | Proceed to "Front Passenger Side Door Entry Lock Function does not Operate" | |
| Rear door LH entry lock function does not operate | Proceed to "Rear Door LH Entry Lock Function does not Operate" | |
| Rear door RH entry lock function does not operate | Proceed to "Rear Door RH Entry Lock Function does not Operate" | |
| Room oscillator does not recognize key | Proceed to "Room Oscillator does not Recognize Key" | |
| Back door entry unlock function does not operate | Proceed to "Back Door Entry Unlock Function does not Operate" | |
| Back door entry lock and unlock functions do not operate | Proceed to "Back Door Entry Lock and Unlock Functions do not Operate" | |
| Back door entry lock function does not operate | Proceed to "Back Door Entry Lock Function does not Operate" | |
| Entry unlock and unlatch functions do not operate using kick sensor | Entry lock function does not operate using close & lock function | |
| Entry lock function does not operate using close & lock function | Proceed to "Entry Lock Function does not Operate Using Close & Lock Function" | |
| New key cannot be registered | Proceed to "New Key cannot be Registered" | |
| Additional key cannot be registered | Proceed to "Additional Key cannot be Registered" | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the I53 certification ECU (smart key ECU assembly) connector. (b) Measure the voltage and resistance according to the
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Smart access system with push-button start (for Entry Function) data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3).
Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTC NOTICE: When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds
SEE MORE:
Slip Indicator Light Remains ON
DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. If the skid control ECU (brake booster with master cylinder assembly) stores a DTC, the slip indicator light comes on in the combination meter assembly
Thermostat (P0128)
DESCRIPTION This DTC is stored when the engine coolant temperature does not reach 73°C (163°F) despite sufficient engine warm-up time having elapsed. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory P0128 Thermostat All of the following conditions are met
