- Windshield glass is dirty or fogged up
- Forward recognition camera is dirty or fogged up
Lexus NX: Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE FUNCTION
(a) When a malfunction occurs in the pre-collision system, a message will be displayed on the multi-information display and the pre-collision system will be disabled depending on the malfunction.
| Warning Message | Cause | DTC/RoB | Conditions to Return to Normal |
|---|---|---|---|
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | C142571 | The system stops receiving stop light drive relay malfunction signals from the skid control ECU (brake booster with master cylinder assembly) after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U010087 | Communication with the hybrid vehicle control ECU is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U012587 | Communication with the airbag ECU assembly is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U012687 | Communication with steering sensor is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U012987 | Communication with the skid control ECU (brake booster with master cylinder assembly) is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U023587 | Communication with the millimeter wave radar sensor assembly is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U023A87 | Communication with the skid control ECU (brake booster with master cylinder assembly) is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U029387 | Communication with the hybrid control ECU is restored to normal |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U030051 | Approximately 3 seconds or more elapse after the forward recognition camera judges the vehicle information sent from the hybrid vehicle control ECU |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U030057 | The vehicle information from the hybrid vehicle control ECU and the information stored by the forward recognition camera match |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | U041881 | The system stops receiving brake control system malfunction signals from the skid control ECU (brake booster with master cylinder assembly) after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2000 | The system stops receiving yaw rate sensor malfunction signals from the skid control ECU (brake booster with master cylinder assembly) or airbag ECU assembly after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2001 | The system stops receiving steering angle sensor malfunction signals from the steering sensor after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2002 | The system stops receiving hybrid vehicle control system malfunction signals from the hybrid vehicle control ECU |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2003 | The system stops receiving electronically controlled brake system malfunction signals from the skid control ECU (brake booster with master cylinder assembly) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2006 | The forward recognition camera is no longer able to buzzer malfunctions |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2011 | The forward recognition camera is no longer able to detect destination unconfirmed malfunctions |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2012 | The system is no longer able to detect forward recognition camera malfunctions after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2013 | The forward recognition camera is no longer able to detect camera axis misaligned malfunctions after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2014 | The forward recognition camera is no longer able to detect axis not adjusted malfunctions |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2018 | The forward recognition camera is no longer able to detect hot-wire heater malfunctions after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X201D | The forward recognition camera is no longer able to detect destination malfunction signals |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2020 | The system stops receiving destination malfunction signals from the millimeter wave radar sensor assembly |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2021 | The system stops receiving malfunction signals from the millimeter wave radar sensor after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2022 | The system stops receiving axis misalignment signals from the millimeter wave radar sensor after turning the power switch from off to on (IG) |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2023 | The system stops receiving beam axis not adjusted signals from the millimeter wave radar sensor assembly |
| "Pre-Collision System Malfunction Visit Your Dealer" is displayed | Pre-collision system malfunction | X2070 | The system stops receiving forward recognition camera communication malfunction signals output from the millimeter wave radar sensor assembly |
| "Pre-Collision System Unavailable" is displayed | Millimeter wave radar sensor assembly axis is misaligned | X2024 | Millimeter wave radar sensor beam axis adjustment is completed and beam axis learning is completed |
| "Pre-Collision System Unavailable" is displayed | Millimeter wave radar sensor assembly axis is misaligned | X2025 | Millimeter wave radar sensor beam axis adjustment is completed and beam axis learning is completed |
| "Pre-Collision System Unavailable Clean Sensor" is displayed | Foreign matter attached to millimeter wave radar sensor assembly | X2026 | Millimeter wave radar sensor assembly is cleaned |
| "Pre-Collision System Unavailable" is displayed | Millimeter wave radar sensor assembly temperature malfunction | X2027 | Millimeter wave radar sensor temperature returns to normal |
| "Pre-Collision System Unavailable" is displayed | Millimeter wave radar sensor assembly low voltage malfunction | X2028 | Millimeter wave radar sensor voltage returns to normal |
| "Front Camera Unavailable See Owner's Manual" is displayed | | X2015 | Forward recognition camera or area of windshield glass in front of forward recognition camera is cleaned |
| "Front Camera Unavailable" is displayed | Forward recognition camera temperature outside of operational range | X2016 | Forward recognition camera temperature returns to normal |
| "Front Camera Unavailable" is displayed | Outside of forward recognition camera guaranteed operating voltage | X2017 | Forward recognition camera voltage returns to normal |
| "Front Camera Unavailable" is displayed | Forward recognition camera is temporarily unavailable (forward recognition camera recognition stopped) | X201F | After forward recognition camera returns to normal |
READ NEXT:
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
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C142571 Stop Light Relay Actuator Stuck U012587 Lost Communication With Multi-axis Acceleration S
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 CO
SEE MORE:
No Sound can be Heard from Speakers
PROCEDURE 1. CHECK AUDIO SETTINGS (a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal. OK: Audio system returns to normal. HINT: Sound quality adjustment measures vary according to the type of amplifier. OK END
Terminals Of Ecu
TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE: DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed. (a) Measure the voltage and resistance according to the value(s) in the
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