Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

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

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

  • 550 to 650 rpm: idling (for 2GR-FKS with Automatic Transmission)
  • 500 to 600 rpm: idling (for 2GR-FKS with Manual Transmission)
  • 700 to 800 rpm: Idling (for 2TR-FE with Automatic Transmission)
  • 600 to 700 rpm: idling (for 2TR-FE with Manual Transmission)

-

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.

  • for 2TR-FE: (See page for 2GR-FKS: (See page  ) )
  • for 2GR-FKS: (See page )
Result

Result

Proceed to

Engine control DTC is not output

A

Engine control (for 2TR-FE) DTC is output

B

Engine control (for 2GR-FKS) DTC is output

C

A

REPLACE COMBINATION METER ASSEMBLY

B

GO TO SFI SYSTEM (for 2TR-FE)

C

GO TO SFI SYSTEM (for 2GR-FKS)

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