Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Tight-corner braking phenomenon* | 4WD linear solenoid circuit | .gif) |
| Steering sensor circuit | | |
| Vehicle stability control system | | |
| 4WD ECU assembly | | |
| Electro magnetic control coupling sub-assembly | | |
| AWD warning message remains displayed | AWD warning light circuit (Remains illuminated) | |
| AWD warning message is not displayed | AWD warning light circuit (Does not illuminate) | |
| AWD lock function does not operate | AWD lock mode switch circuit | |
| 4WD ECU assembly | | |
| AWD lock mode indicator light does not illuminate | CAN communication system | |
| AWD lock mode switch circuit | | |
| Combination meter assembly | | |
| 4WD ECU assembly | |
- *: Tight corner braking phenomenon: a phenomenon in which an AWD vehicle may lurch and decelerate due to a rotational speed difference between the front and rear wheels, such as during low-speed cornering in AWD mode.
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure listed to troubleshoot the Dynamic Torque Control AWD system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP ...
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION Dynamic torque control AWD 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 ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Battery (P212012,P212014,P21201F,P212512,P212514,P21251F,P21382B)
DESCRIPTION HINT:
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
These DTCs relate to the accelerator pedal position sensor.
The accelerator pedal position sensor is built into the accelerator pedal sensor assembly and has 2 sensor circuits: VPA (main) and VPA2 ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sliding Roof System: Switch Failure (B2342)
DESCRIPTION This DTC is stored when the sliding roof ECU (sliding roof drive gear sub-assembly) detects that the sliding roof switch (map light assembly) is stuck for 30 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B2342 Switch Failure Sliding roof EC ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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