GSIC - Global Service Information Center

### METER / GAUGE SYSTEM > Malfunction in Tachometer

## for Preparation Click here

## WIRING DIAGRAM

## INSPECTION PROCEDURE

1.CHECK COMBINATION METER ASSEMBLY

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)

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)