Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
- If the problem only occurs in certain locations or at certain times of day, check for wave interference.
- If the optional components are installed, check for wave interference from the components.
| Symptom | Suspected Area | Link |
|---|---|---|
| Security indicator light does not blink | Proceed to "Security Indicator Light Does not Blink" | |
| Immobiliser system does not operate properly | Proceed to "Immobiliser System does not Operate Properly" | |
| Engine cannot be started*1 | Certification ECU (Smart key ECU assembly) | |
| ECM | - | |
| SFI system | - | |
| Power source mode cannot be changed*1 | Engine switch | |
| Certification ECU (Smart key ECU assembly) | - | |
| Steering lock lock/unlock not possible*2 | Steering lock ECU (Steering lock actuator or upper bracket assembly) | |
| Engine cannot be started by lexus enform remote (Engine can be started by push-button start function)*3 | Proceed to "Remote Engine Starter does not Operate" | |
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- *1: Refer to Problem Symptoms Table for Smart Access System with Push-button Start (for Start Function).
- *2: Refer to Problem Symptoms Table for Steering Lock System.
- *3: w/ Lexus Enform Remote
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use this procedure to troubleshoot the immobiliser system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. ...
Registration
REGISTRATION PROCEDURE 1. CAUTION REGARDING INTERFERENCE WITH ELECTRONIC DEVICES CAUTION:
People with implantable cardiac pacemakers, cardiac resynchronization therapy-pacemakers or implantable car ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Air Conditioning Unit: Installation
INSTALLATION PROCEDURE 1. TEMPORARILY INSTALL AIR CONDITIONER UNIT ASSEMBLY (a) Temporarily install the air conditioner unit assembly to the instrument panel reinforcement assembly with the 3 bolts. 2. INSTALL INSTRUMENT PANEL REINFORCEMENT ASSEMBLY WITH AIR CONDITIONER UNIT ASSEMBLY NOTICE:
Be s ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lin Communication System: Lost Communication with Power Source Control (B278C)
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B278C Lost Communication with Power Source Control ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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