METER / GAUGE SYSTEM > Tachometer Malfunction

for Preparation Click here


DESCRIPTION

The combination meter assembly controls the tachometer in accordance with engine speed signals from the ECM through the CAN communication system.

WIRING DIAGRAM


E140490E28


INSPECTION PROCEDURE

1.CONFIRM DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Check DTC (Click here).
    Result 
    Result
    		Proceed to
    DTC U0100 is not output
    		A
    DTC U0100 is output
    		B



B
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A


2.CONFIRM DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Check DTC (Click here).
    Result 
    Result
    		Proceed to
    Engine control DTC is not output
    		A
    Engine control DTC is output (for 1KR-FE)
    		B
    Engine control DTC is output (for 1NR-FE)
    		C
    Engine control DTC is output (for 1ND-TV)
    		D



B
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)

C
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)

D
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (TACHOMETER)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

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

  1. According to the display on the tester, 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
    		-

    OK:
    Engine speed displayed on the tester is approximately the same as that of the tachometer reading.



NG
REPLACE COMBINATION METER ASSEMBLY (Click here)
OK


4.READ VALUE USING INTELLIGENT TESTER (TACHOMETER)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Turn the tester on.

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

  1. According to the display on the tester, 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 tester is approximately the same as that displayed on the combination meter.

    NOTICE:
    Determine whether the value displayed on the tester is within the acceptable range by referring to the reference values described in "On-Vehicle Inspection" (Click here).



NG
REPLACE COMBINATION METER ASSEMBLY (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)