Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Problem Symptoms Table

NOTICE:

• If the battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the battery, referring to On-vehicle Inspection for the charging system.

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• If the battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

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HINT:

• Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
• Inspect the fuses and relays related to this system before inspecting the suspected areas below.

• *1: w/o Rear No. 2 Seat
• *2: w/ Rear No. 2 Seat

Operation Check

OPERATION CHECK CHECK FRONT SEAT HEATER (a) Turn the engine switch on (IG). (b) Turn the refreshing seat switch (for front side) (heater position) on and check that the indicator illuminates and the s ...

Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION (a) Seat heater system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctio ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Sfi System: HO2S Heater Control Bank 1 Sensor 1 Circuit Short to Battery (P003012,P003013,P005012,P005013,P101A9E,P103A9E)
DESCRIPTION Refer to DTC P219519. Click here HINT: When any of these DTCs are stored, the ECM enters fail-safe mode. The ECM turns off the air fuel ratio sensor heater in fail-safe mode. Fail-safe mode continues until the engine switch is turned off. Although the DTC titles say oxygen sensor ...

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Front Power Seat Control System (w/ Memory): Power Seat Power Easy Access System Function does not Operate
DESCRIPTION The seat slides backward when either of the following conditions is met: The driver seat belt is unfastened with the engine switch off and the shift lever in P. The engine switch is turned from on (IG) or on (ACC) to off with the shift lever in P and the driver seat belt unfasten ...