Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJOD
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Tachometer Malfunction; 2016 MY Sienna [12/2015 - 08/2016]

Tachometer Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine speed signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays the engine speed calculated based on the data received from the ECM.

WIRING DIAGRAM

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output (See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM ).

Result

Result

Proceed to

CAN communication DTC is not output

A

CAN communication DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(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.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

TachoMeter Operation

Tachometer

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

Operate with IG ON and the vehicle is stopped.

OK:

Tachometer indication is normal.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.

READ VALUE USING TECHSTREAM (ENGINE RPM)

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Rpm

Engine speed/

Min.: 0 rpm, Max.: 12750 rpm

600 to 700 rpm: Idling

-

OK:

Engine speed displayed on the Techstream is almost the same as the tachometer indication.

HINT:

Check the engine speed when the engine is fully warmed up, and the air conditioning and all electrical accessories are off.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

4.

CHECK ENGINE CONTROL SYSTEM

(a) Check if a engine control DTC is output (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

Engine control DTC is not output

A

Engine control DTC is output

B

A

REPLACE COMBINATION METER ASSEMBLY

B

GO TO SFI SYSTEM