Meter / Gauge System (For Hatchback) Tachometer Malfunction

Vehicle Interior. Yaris. Ncp93, 131
Meter Gauge Display. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER OPERATION)

READ VALUE USING TECHSTREAM (ENGINE RPM)

CHECK ENGINE CONTROL SYSTEM

METER / GAUGE SYSTEM (for Hatchback) - 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


Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Hatchback) Tachometer Malfunction


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication DTC is output (YARIS_NCP93 RM000001RSW02LX.html).

    Result
    Result
    		Proceed to
    CAN communication DTC is not output
    		A
    CAN communication DTC is output (for Hatchback except Separate Type Yaw Rate Sensor)
    		B
    CAN communication DTC is output (for Hatchback with Separate Type Yaw Rate Sensor)
    		C


B
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSW02LX.html)

C
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSW02PX.html)
A


2.PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER OPERATION)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Combination Meter / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    TachoMeter Operation
    		Tachometer
    		0/1000/2000/3000/4000/5000/6000/7000 rpm
    		Perform the test with the vehicle stopped and the engine idling.
    OK:
    Tachometer indication is normal.


NG
REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)
OK


3.READ VALUE USING TECHSTREAM (ENGINE RPM)

  1. Connect the Techstream to the DLC3.

  1. Start the engine.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Combination Meter / Data List.

  1. 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
    Max.: 12750
    		Approximately same as actual engine speed (when engine is running)
    		Unit: rpm
    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 (YARIS_NCP93 RM0000035EJ00BX.html)
OK


4.CHECK ENGINE CONTROL SYSTEM

  1. Check if a engine control DTC is output (YARIS_NCP93 RM000000PDK0T5X.html).

    Result
    Result
    		Proceed to
    Engine control DTC is not output
    		A
    Engine control DTC is output
    		B


B
GO TO SFI SYSTEM (YARIS_NCP93 RM000000PDF0EWX.html)
A

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)