Lexus RX (RX 350L, RX450h) 2016-2025 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

    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

GO TO CAN COMMUNICATION SYSTEM

A

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

A

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

-

Body Electrical > Combination Meter > Active Test

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

A

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

-

Chassis > Lane Control > Data List

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

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