METER / GAUGE SYSTEM > Malfunction in Tachometer

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WIRING DIAGRAM


E110256E01


INSPECTION PROCEDURE

1.CHECK COMBINATION METER ASSEMBLY
E076236E01

  1. Disconnect the C8 meter connector.

  1. Using an oscilloscope, check the signal waveform of the meter.
    Tester Connection
    		Tool Setting
    		Vehicle Condition
    C8-7 - Body ground
    		5 V/DIV., 10 msec./DIV.
    		Engine idling

    OK:
    Refer to the illustration

    HINT:
    As the engine speed increases, the wavelength shortens.



NG
Go to step 2
OK

REPLACE COMBINATION METER ASSEMBLY 

2.CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - ECM)

E110674E02

  1. Disconnect the C8 meter connector.

  1. Disconnect the E10*1, E13*2 or E5*3 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    1TR-FE, 2TR-FE 
    Tester Connection
    		Specified Condition
    C8-4 - E10-1 (TACH)
    		Below 1 Ω

    1GR-FE:
    Tester Connection
    		Specified Condition
    C8-4 - E13-1 (TACH)
    		Below 1 Ω

    1KD-FTV, 2KD-FTV:
    Tester Connection
    		Specified Condition
    C8-4 - E5-4 (TACH)
    		Below 1 Ω

    HINT:
    *1: 1TR-FE, 2TR-FE
    *2: 1GR-FE
    *3: 1KD-FTV, 2KD-FTV



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

GO TO SFI SYSTEM (1TR-FE, 2TR-FE, 1GR-FE), ECD SYSTEM (1KD-FTV, 2KD-FTV)