Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Indicator Circuit
DESCRIPTION
The forward recognition camera sends indicator illumination request signals to the combination meter assembly via CAN communication.
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
HINT:
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition: Click here
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Sequential Recognition: Click here
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / Can Bus Check.
CAN Bus Check| Result | Proceed to |
|---|---|
| All of the ECUs and sensors that are currently connected to the CAN communication system are displayed | A |
| None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
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| 2. | CHECK FOR DTCs (HEALTH CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / Health Check.
(e) Check for DTCs.
(f) Turn the engine switch off.
| Result | Proceed to |
|---|---|
| No DTCs are output | A |
| DTCs are output | B |
| B | | GO TO DTC CHART |
|
| 3. | PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Body Electrical > Combination Meter > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Meter Display 1 | Multi-information display | OFF or All | - |
| Tester Display |
|---|
| Meter Display 1 |
(f) Turn the engine switch off.
| Result | Proceed to |
|---|---|
| The multi-information display turns on according to the operation of the Active Test | A |
| The multi-information display does not turn on according to the operation of the Active Test | B |
| B | | REPLACE COMBINATION METER ASSEMBLY |
|
| 4. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Lane Control / Data List.
(e) Read the Data List according to the display on the Techstream.
Chassis > Lane Control > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| LDA Control | Lane control system control status | Prohibit or Permit | Prohibit: Control prohibited Permit: Control permitted | - |
| Tester Display |
|---|
| LDA Control |
| Result | Proceed to |
|---|---|
| The LTA indicator illuminates and the Data List item LDA Control changes according to the operation of the LTA main switch | A |
| The LTA indicator does not illuminate but the Data List item LDA Control changes according to the operation of the LTA main switch | B |
| The LTA indicator does not illuminate and the Data List item LDA Control does not change according to the operation of the LTA main switch | C |
| A | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| B | | REPLACE COMBINATION METER ASSEMBLY |
| C | | REPLACE FORWARD RECOGNITION CAMERA |
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CAUTION / NOTICE / HINT HINT:
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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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