Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Combination Meter Mirror ECU Communication Stop Mode

NOTICE:

• Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
• After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

  Click here

• Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

  Click here

• After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
• DTC check procedure: Turn the engine switch on (IG) and wait for at least 13 seconds.
• After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

  Click here

• Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

• Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
• Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Restraints Occupant Classification System Module Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Restraints Occupant Classification System Module Communication Stop Mode Either condition is met: "Occupant Detection" is not displayed ...

Open in Bus 1 Main Bus Line

DESCRIPTION There may be an open circuit in one of the bus 1 main lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the network gateway ECU is 70 Ω or higher. Symptom Trouble ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Safety Connect System: Emergency Call Switch Illumination Circuit
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System. Click here Inspect the fuses for circuits rel ...

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Blind Spot Monitor System: System Description
SYSTEM DESCRIPTION GENERAL (a) The blind spot monitor system has a blind spot monitor function and RCTA function. (1) Blind spot monitor function The blind spot monitor function is a function that assists the driver when changing lanes. This function uses quasi-millimeter wave radar to detect veh ...