Toyota Tundra Service Manual: Tachometer Malfunction

DESCRIPTION

The combination meter assembly receives engine speed signals from the ECM via the CAN line. The combination meter assembly displays engine speed data that is calculated based on the data received from the ECM.

WIRING DIAGRAM

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output (See page ).

Result

Result

Proceed to

CAN communication system DTC is not output

A

CAN communication system DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER)

(a) Operate the Techstream according to the display and select "Active Test" (See page ).

Combination Meter:

Tester Display

Test Part

Control Range

Diagnostic Note

Tachometer Operation

Tachometer

0, 1000, 2000, 3000, 4000, 5000, 6000, 7000

Perform the test with the vehicle stopped and engine idling

OK:

Needle indication is normal.

HINT:

Confirm that the vehicle is stopped and engine idling.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.

READ VALUE USING TECHSTREAM (TACHOMETER)

(a) Operate the Techstream according to the display and select "Data List" (See page ).

Combination Meter:

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Rpm

Engine speed/Min.: 0, Max.: 12750

Idling: 650 to 750

Unit: rpm

OK:

Engine speed displayed on Techstream is almost the same as actual engine speed.

OK

REPLACE COMBINATION METER ASSEMBLY

NG

4.

READ VALUE USING TECHSTREAM (ENGINE SPEED)

(a) Operate the Techstream according to the display and select "Data List" (See page ).

Engine:

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Speed

Engine speed/Min.: 0, Max.: 16838

Idling: 650 to 750

Unit: rpm

OK:

Engine speed displayed on Techstream is almost the same as actual engine speed.

Result

Result

Proceed to

OK

A

NG (for 1UR-FE)

B

NG (for 3UR-FE)

C

NG (for 3UR-FBE)

D

A

REPLACE COMBINATION METER ASSEMBLY

B

GO TO PROBLEM SYMPTOMS TABLE

C

GO TO PROBLEM SYMPTOMS TABLE

D

GO TO PROBLEM SYMPTOMS TABLE

    System Diagram

    Terminals Of Ecu

    See More:

    Toyota Tundra Service Manual > Rear Seat Assembly(for Crewmax Lh Side): Removal
    REMOVAL PROCEDURE 1. REMOVE REAR SEAT ASSEMBLY RH (a) Pull the No. 1 reclining adjuster release handle RH and fold up the seat cushion. (b) Remove the 4 bolts and rear seat assembly RH. NOTICE: Be careful not to damage the vehicle body. 2. REMOVE REAR SEAT INNER BELT ASSEMBLY (a) Remove the bolt. (b ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2023 Copyright www.ttundra.com
    0.006