Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
(a) The steering lock ECU (steering lock actuator or upper bracket assembly) stores DTCs when a malfunction occurs in the system. These DTCs can be confirmed by using the Techstream.
NOTICE:
- When using the Techstream with the engine switch off to confirm DTCs or Data List information related to the smart access system, the Techstream may not operate unless either of the following is performed: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle and select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Access.
- Do not remove any fuses or disconnect the cable from the negative (-) battery terminal before confirming and recording DTCs as the data stored in the ECUs will be cleared.
- DTCs may have been stored due to problems unrelated to the steering lock system. Be sure to confirm and record any DTCs output for other systems.
(b) The steering lock ECU (steering lock actuator or upper bracket assembly) is not connected to the CAN communication system. Therefore, communication with the Techstream is performed via the certification ECU (smart key ECU assembly).
(c) The steering lock ECU (steering lock actuator or upper bracket assembly) only stores DTCs for currently existing malfunctions. History DTCs are not stored.
Data List / Active Test
DATA LIST / ACTIVE TEST READ 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 part ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Steering Lock System DTC No. Detection Item DTC Detection Condition Note Link B2781 Open / Short in Steering Lock ECU One of the following conditions i ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Immobiliser System: 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 inter ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Pre-collision System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C142571 Stop Light Relay Actuator Stuck U010087 Lost Communication with ECM/PCM "A" Missing Message U012587 Lost Communication with Multi-axis Acceleration Sensor Module Missing Message ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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