Toyota Tundra Service Manual: Indicator Circuit

Toyota Tundra Service Manual / Engine, Hybrid System / Cruise Control / Lane Departure Alert System / 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 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 ignition switch to ON.

(d) Enter the following menus: System Select / 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

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC (HEALTH CHECK)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: System Select / Health Check.

(e) Check DTCs.

Result	Proceed to
No DTCs are output.	A
DTCs are output.	B

GO TO DTC CHART

3.	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) According to the display on the Techstream, perform the Active Test.

Tester Display	Measurement Item	Control Range	Diagnostic Note
Meter Display 1	Multi-information display	ALL or OFF	Perform the test with the vehicle stopped and engine idling

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

4.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Data List.

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

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

LDA Control

Control status of lane departure alert system

Prohibit or Permit

Prohibit: Control prohibited

Permit: Control permitted

Result	Proceed to
The lane departure alert indicator illuminates and turns on according to the operation of the lane departure alert main switch	A
The lane departure alert indicator does not illuminate but the Data List item LDA Control changes according to the operation of the lane departure alert main switch	B
The lane departure alert indicator does not illuminate and the Data List item LDA Control does not change according to the operation of the lane departure alert main switch	C

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE COMBINATION METER ASSEMBLY

REPLACE FORWARD RECOGNITION CAMERA

How To Proceed With Troubleshooting

Operation Check

See More:

Toyota Tundra Service Manual > Lane Departure Alert System: Lost Communication with Yaw Rate Sensor Module (U0123,U0126,U0129,U0142,U0155)
DESCRIPTION These DTCs are output when a communication malfunction occurs between the sensors and ECUs. DTC No. Detection Item DTC Detection Condition Trouble Area U0123 Lost Communication with Yaw Rate Sensor Module 3 seconds after the ignition switch is turned to ON, the vehicle is being driven at ...

Toyota Tundra Service Manual: Indicator Circuit

How To Proceed With Troubleshooting

Operation Check

See More:

Toyota Tundra Owners Manual

Toyota Tundra Service Manual