Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Warning Notification Function Malfunction
PROCEDURE
| 1. | CHECK PROBLEM SYMPTOM (WARNING NOTIFICATION FUNCTION) |
(a) Check the problem symptom.
(1) Check the problem symptom of the warning notification function.
| Result | Proceed to |
|---|---|
| The multi-display screen does not show a warning message even though a warning light turns on or the multi-information display indicates a warning. | A |
| The multi-display screen shows a warning message even though a warning light is not on and the multi-information display does not indicate a warning. | B |
| The multi-display screen shows a warning message different from the warning light or the multi-information display. |
HINT:
- The warning notification function sends information to the service center through communication.
- Carefully confirm the conditions that caused the malfunction in order to determine if a temporary problem with the radio wave signal conditions caused the malfunction.
| B | .gif) | GO TO STEP 7 |
|
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| 2. | INSPECT WARNING LIGHT |
(a) Check if the indicated warning light or message is listed in the following table.
HINT:
Only messages listed in the table are included in the warning notification function.
| Warning Name |
|---|
| Engine warning |
| Brake system warning |
| VSC warning |
| ABS warning |
| ECB warning |
| EPS warning |
| Charging system warning |
| Airbag warning |
| PCS warning |
| Cruise warning |
| LEXUS parking assist-sensor system open circuit warning |
| Drive start control warning |
| Brake override system warning |
| Entry and start system warning |
| Automatic headlight beam level control system warning |
| Automatic high beam warning |
| LED headlight warning |
| 4WD warning |
| Tire pressure system warning |
| Electric parking brake warning |
| Auto hold warning |
| BSM system warning |
| Reverse control wiper warning |
| Advanced sonar system warning |
| Secondary collision brake system warning |
| Engine maintenance warning |
| LTA warning |
| RSA warning |
| RCTA warning |
| Engine oil level warning |
| Brake fluid warning |
| Engine oil pressure warning |
| Tire pressure system warning |
| Washer fluid level warning |
| Engine oil maintenance warning |
| High coolant temperature warning |
| Result | Proceed to |
|---|---|
| Warning light or message is listed in the table. | A |
| Warning light or message is not listed in the table. | B |
| B | | END |
|
| 3. | CHECK CAN COMMUNICATION SYSTEM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Bus Check.
(e) Check that all ECUs and sensors that use CAN communication are connected.
Click here .gif)
| Result | Proceed to |
|---|---|
| There are no connection problems. | A |
| There is a connection problem. | B |
| B | | GO TO CAN COMMUNICATION SYSTEM |
|
| 4. | CHECK METER WARNING LIGHT |
(a) Check that the warning light of the combination meter assembly illuminates and a message displays on the multi-information display when there is a malfunction, and do not when there is not a malfunction.
OK:
There are no problems with warning lights or warning messages.
HINT:
The warning notification function of the telematics system uses the warning notification signals sent and received by the meter/gauge system. Therefore, if the meter/gauge system is not operating normally, the warning notification function will not operate normally.
| Result | Proceed to |
|---|---|
| OK (w/ Navigation System) | A |
| OK (w/o Navigation System) | B |
| NG | C |
| B | | GO TO STEP 6 |
| C | | GO TO METER / GAUGE SYSTEM |
|
| 5. | CHECK NAVIGATION SYSTEM |
(a) Check if the navigation system is operating and functioning normally.
OK:
The navigation system is normal.
| OK | | REPLACE RADIO RECEIVER ASSEMBLY |
| NG | | GO TO NAVIGATION SYSTEM |
| 6. | CHECK AUDIO AND VISUAL SYSTEM |
(a) Check if the audio and visual system is operating and functioning normally.
OK:
The audio and visual system is normal.
| OK | | REPLACE RADIO RECEIVER ASSEMBLY |
| NG | | GO TO AUDIO AND VISUAL SYSTEM |
| 7. | CHECK METER WARNING LIGHT |
(a) Check that the warning light of the combination meter assembly illuminates and a message displays on the multi-information display when there is a malfunction, and do not when there is not a malfunction.
OK:
There are no problems with warning lights or warning messages.
HINT:
The warning notification function of the telematics system uses the warning notification signals sent and received by the meter/gauge system. Therefore, if the meter/gauge system is not operating normally, the warning notification function will not operate normally.
| OK | | REPLACE RADIO RECEIVER ASSEMBLY |
| NG | | GO TO METER / GAUGE SYSTEM |
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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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