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 > Occupant Classification System: Lost Communication with Multi-axis Acceleration Sensor Module (U0125,U0129)
DESCRIPTION The occupant detection ECU sends/receives signals to/from each ECU via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area U0125 Lost Communication with Multi-axis Acceleration Sensor Module CAN communication error between the occupant detectio ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Intelligent Clearance Sonar System: Stop Switch Circuit Malfunction (C164E)
DESCRIPTION When a stop light switch assembly circuit malfunction signal sent from the vehicle stability control system is detected by the clearance warning ECU assembly, DTC C164E is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C164E Stop Switch Circuit Malfunc ...
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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