Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: 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 is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

  • The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning).
  • The steering lock motor activation circuit has a short circuit.
  • The steering lock motor activation circuit has an open circuit.

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

B2782

Power Source Control ECU Malfunction

Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

  • The steering lock motor activation command circuit has a short circuit.
  • The steering lock motor activation command circuit has an open circuit.

HINT:

If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.

DTC Output Confirmation Operation: Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.)

B2788

IG2 Signal Malfunction

Mismatch between the steering lock ECU (steering lock actuator or upper bracket assembly) IG2 input from the LIN communication system and from the direct line. (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).))

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

    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 ...

    Dtc Check / Clear
    DTC CHECK / CLEAR NOTICE: The steering lock ECU (steering lock actuator or upper bracket assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Safety Connect System: Red Indicator Remains On
    DESCRIPTION This means that the DCM (telematics transceiver) has detected a malfunction in the safety connect system and stored a DTC or specific vehicle control history (RoB) Code. PROCEDURE 1. CHECK DTC (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the e ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Dynamic Radar Cruise Control System: Communication Error from ECM to VSC Invalid Serial Data Received (P163181)
    DESCRIPTION The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. When the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for a certain period of time, DTC P163181 is stored. DTC No. Detection Item DTC ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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