Lexus RX (RX 350L, RX450h) 2016-2025 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) 2016-2025 Repair Manual > Pre-collision System: Diagnosis System
DIAGNOSIS SYSTEM FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message is displayed on the multi-information display. *a PCS Warning Light PCS warning light Warning Mess ...

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lin Communication System: Rear Door LH ECU Communication Stop (B2324)
DESCRIPTION This DTC is stored when LIN communication between the power window regulator motor assembly (for rear LH door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B2324 Rear Door LH ECU Co ...