Meter / Gauge System Tachometer Malfunction

Body Electrical. Camry. Acv40 Gsv40
Meter. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)

READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)

REPLACE ECM

METER / GAUGE SYSTEM - Tachometer Malfunction


DESCRIPTION

The meter CPU receives engine revolution signals from the ECM via the CAN communication lines (CAN No. 1 Bus). The meter CPU displays engine revolution data that is calculated based on the data received from the ECM.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Meter.Meter / Gauge System.Meter / Gauge System Tachometer Malfunction


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if CAN communication DTC is output (CAMRY_ACV40 RM000000WIB05NX.htmlfor LHD, CAMRY_ACV40 RM000000WIB05SX.html for RHD).

    Result:

    Result
    		Proceed to
    CAN communication DTC is not output.
    		A
    CAN communication DTC is output.
    		B (CAMRY_ACV40 RM000000WI605LX.htmlfor LHD, CAMRY_ACV40 RM000000WI605KX.html for RHD)


B
GO TO CAN COMMUNICATION SYSTEM
A


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the tester ON.

  1. Enter the following menus: Diagnosis / OBD/MOBD / Combination Meter / Active Test.

  1. Check the operation by referring to the values in the table below.

    Combination Meter:
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Tacho Meter Operation
    		Tachometer
    		0, 1,000, 2,000, 3,000, 4,000, 5,000, 6,000, 7,000, (rpm)
    		-
    OK:
    Needle indication is normal.


NG
REPLACE COMBINATION METER ASSEMBLY
OK


3.READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the tester ON.

  1. Enter the following menus: Diagnosis / OBD/MOBD / Combination Meter / Data List.

  1. Check the operation by referring to the values in the table below.

    Combination Meter:
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Engine Rpm
    		Engine speed/Min.: 0 rpm, Max.: 12,750 rpm
    		Almost same as actual engine speed (When engine is running)
    		If data received from the ECM exceeds the range that can be displayed on the meter, the meter continues to display the maximum value of the range.
OK:
Engine speed displayed on the tester is almost the same as the actual engine speed.


NG
Go to step 4
OK

REPLACE COMBINATION METER ASSEMBLY

4.READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the tester ON.

  1. Enter the following menus: Diagnosis / OBD/MOBD / Engine / Data List.

  1. Check the values by referring to the table below.

    Engine:
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Engine Speed
    		Engine speed/Min.: 0 rpm, Max.: 12,800 rpm
    		Almost same as actual engine speed (When engine is running)
    		-
OK:
Engine speed displayed on the tester is almost the same as the actual engine speed.


NG
GO TO SFI SYSTEM
OK


5.REPLACE ECM

  1. Replace the ECM with a new or a normal one.

OK:
The operation of the tachometer returns to normal.


NG
REPLACE COMBINATION METER ASSEMBLY
OK

END