Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Detecting Vehicle Submersion (B2277)

• *: Only detected while a malfunction is present.

NOTICE:

• When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
• The smart access system with push-button start (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart access system with push-button start (for Start Function) after confirming that the communication systems are functioning properly.

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• Before replacing the certification ECU (smart key ECU assembly), refer to the smart access system with push-button start (for Start Function) Precaution.

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• After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT:

• Before proceeding with troubleshooting, check if there are any signs of water damage to the certification ECU (smart key ECU assembly). If there are any signs of water damage, replace the certification ECU (smart key ECU assembly) and take measures against the cause of the water damage.
• When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

ACC Monitor Malfunction (B2274)

DESCRIPTION This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit between terminal ACCD of the certification ECU (smart key ECU assembly) a ...

Engine/Power Switch Malfunction (B2278)

DESCRIPTION This DTC is stored when the SSW1 contact signal and SSW2 contact signal, which are detected when the engine switch is operated, do not match. DTC No. Detection Item DTC Detection Co ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Pre-collision System: Invalid Data Received from Brake System Control Module Invalid Serial Data Received (U041881)
DESCRIPTION The skid control ECU (brake actuator assembly) sends signals indicating the status of the vehicle stability control system to the forward recognition camera via CAN communication. If the forward recognition camera receives a vehicle stability control system malfunction signal from the sk ...

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Intuitive Parking Assist System (w/ Intelligent Clearance Sonar System): Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of ...