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 |
|---|---|---|
| Wireless control function and entry function do not operate | Proceed to "All Door Entry Lock / Unlock Functions and Wireless Functions do not Operate" | |
| Wireless control function does not operate but entry function operates | Electrical key transmitter sub-assembly | - |
| Only answer-back function does not operate properly | Proceed to "No Answer-Back" | |
| Only automatic lock function does not operate properly | Perform operation check | |
| Lighting system (Int) (Door courtesy switch circuit) | | |
| Main body ECU (Multiplex network body ECU) | - | |
| Only illuminated entry function does not operate | Perform operation check | |
| Lighting system (Int) | | |
| Main body ECU (Multiplex network body ECU) | - | |
| Only door ajar warning function does not operate | Wireless Door Lock Buzzer | |
| Only panic alarm function does not operate | Perform operation check | |
| Lighting system (Ext) (Hazard warning lights) | | |
| Theft deterrent system (Vehicle horns) | | |
| Main body ECU (Multiplex network body ECU) | - |
.gif)
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE WIRELESS DOOR LOCK CONTROL SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first make sure that the fun ...
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junc ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lane Control System: Steering Vibrator Component Internal Failure (C1A7496)
DESCRIPTION If the forward recognition camera receives a steering vibration ECU malfunction signal, DTC C1A7496 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A7496 Steering Vibrator Component Internal Failure While the lane control system is on, a malfunct ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Dynamic Radar Cruise Control System: Communication Error from VSC to ECM Invalid Serial Data Received (P163081)
DESCRIPTION The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. If an abnormal signal is detected, the ECM stores DTC P163081. DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from P163081 Communication E ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0179