Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: System Voltage or GND Energization Malfunction (B228B)

• *: Only detected while a malfunction is present and the engine switch is on (IG).

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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• Inspect the fuses of circuits related to this system before performing the following procedure.
• After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Runnable Signal Malfunction (B2286,P0335)

DESCRIPTION These DTCs are stored when the engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. DTC No. Detection Item DTC De ...

Lost Communication with ECM / PCM (U0100,U0140,U0142,U0155,U1117)

DESCRIPTION These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly), ECM, main body ECU (multiplex network body ECU) or combination m ...

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