Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Cruise Main Indicator Light Circuit

DESCRIPTION

When the dynamic radar cruise control system is turned on using the cruise control main switch, the cruise control indicator (vehicle-to-vehicle distance control mode) illuminates. The ECM uses this and other indicators to indicate the status (presence or absence of a preceding vehicle, vehicle-to-vehicle distance, malfunction of system or related systems) of the dynamic radar cruise control system.

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the ECM, refer to Registration.

    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.

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) Perform the Active Test according to the display on the Techstream.

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

Result

Proceed to

The multi-information display in the combination meter assembly turns on according to the operation of the Active Test

A

The multi-information display in the combination meter assembly does not turn on according to the operation of the Active Test

B

B

GO TO METER / GAUGE SYSTEM

A

2.

READ VALUE USING TECHSTREAM

(a) Enter the following menus: Powertrain / Radar Cruise 1 / Data List.

(b) Read the Data List according to the display on the Techstream.

Powertrain > Cruise Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Cruise Indicator

Cruise control indicator status

OFF or ON

OFF: Cruise control indicator turns off

ON: Cruise control indicator illuminates

-

Powertrain > Cruise Control > Data List

Tester Display

Cruise Indicator

Result

Proceed to

The cruise control indicator illuminates and turns off according to the operation of the cruise control main switch

A

The cruise control indicator does not illuminate but the Data List items change according to the operation of the cruise control main switch

B

The cruise control indicator does not illuminate and the Data List items do not change according to the operation of the cruise control main switch

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

B

REPLACE COMBINATION METER ASSEMBLY

C

REPLACE ECM

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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