Toyota Tundra Service Manual: Cruise SET Indicator Light Circuit

Toyota Tundra Service Manual / Engine, Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Cruise SET Indicator Light Circuit

DESCRIPTION

The ECM illuminates the cruise control SET indicator by sending indicator output demand signals to the combination meter assembly via CAN communication. The cruise control SET indicator illuminates when the dynamic radar cruise control system is controlling vehicle speed. The cruise SET indicator light circuit uses CAN communication. If the cruise control SET indicator is not functioning correctly, check for CAN communication DTCs before troubleshooting this circuit.

CAUTION / NOTICE / HINT

CAUTION:

Observe the following items for safety reasons when using Techstream:

Before using the Techstream, read the instruction Techstream.
Prevent the Techstream cable from being caught on the pedals, shift lever or steering wheel when driving with the Techstream connected to the vehicle.
When driving the vehicle for testing purposes, 2 people are required. One person should operate the Techstream while the other drives the vehicle.

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 (METER DISPLAY 1)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to 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	-

Result	Proceed to
The multi-information display in the combination meter assembly turns on or off according to the operation of the Active Test.	A
The multi-information display in the combination meter assembly does not turn on or off according to the operation of the Active Test.	B

GO TO METER / GAUGE SYSTEM

2.	READ VALUE USING TECHSTREAM (-SET SWITCH)

(a) Turn the cruise control system on using the cruise control main switch (ON-OFF button).

(b) Drive at a speed between approximately 40 km/h (25 mph) and 180 km/h (110 mph).

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

Powertrain > Radar Cruise1 > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

-SET Switch

-SET switch status

ON or OFF

ON: -SET switch on

OFF: -SET switch off

Result	Proceed to
The cruise control SET indicator illuminates and turns off according to the operation of the cruise control main switch (-SET switch).	A
The cruise control SET indicator does not illuminate but the Data List item -SET Switch changes according to the operation of the cruise control main switch (-SET switch).	B
The cruise control SET indicator does not illuminate and the Data List item -SET Switch does not change according to the operation of the cruise control main switch (-SET switch).	C

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE COMBINATION METER ASSEMBLY

REPLACE ECM

Cruise Main Indicator Light Circuit

Data List / Active Test

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