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Home >> Audi >> 2003 >> RS 6 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instruments - 2001 And Up >> Instrument cluster >> Consumption signal, checking >> Test sequence

Test sequence

  1. consumption display constant 0.0 L/100 km 
    NOTE: If the consumption display is constant 0,0 L/100 km, the signal wire could have a short circuit to Ground (GND).
    • Switch ignition off.
    • Connect the respective test box to the Engine Control Module (ECM).

      See appropriate Multiport Fuel Injection (MFI) article in Engine Performance.

    • Remove instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING  .
    • Connect VAG 1598A test box to blue 32-pin multi-pin harness connector using VAG 1598/25 adapter.
    • Connect multimeter for resistance measurement between terminal 25 of VAG 1598/25 test box and the terminal for consumption signal at test box for Engine Control Module (ECM).
      • Specification: smaller than 2 ohm
    • Connect multimeter for resistance measurement between socket for consumption signal at test box for Engine Control Module (ECM) and to Ground (GND).
      • Specification: larger than 9 M ohm

    If the specified values are reached, the wire connection is OK.

  2. consumption display constant 51.0 L/100 km 
    NOTE: If the consumption display is constant 51.0 L/100 km, the signal wire could have an open circuit.
    • Switch ignition off.
    • Connect the respective test box to the Engine Control Module (ECM).

      See appropriate Multiport Fuel Injection (MFI) article in Engine Performance.

    • Remove instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING  .
    • Connect VAG 1598A test box to blue 32-pin multi-pin harness connector using VAG 1598/25 adapter.
    • Connect multimeter for resistance measurement between terminal 25 of VAG 1598/25 test box and the terminal for consumption signal at test box for Engine Control Module (ECM).
      • Specification: smaller than 2 ohm
    • Connect multimeter for resistance measurement between socket for consumption signal at test box for Engine Control Module (ECM) and to Ground (GND).
      • Specification: larger than 9 M ohm

    If the specified values are reached, the wire connection is OK.

  3. The consumption display has no logical or a fluctuating consumption value. 

    The consumption display deviates from the actual fuel consumption.

    • Perform adaptation of consumption display.

    See ADAPTATION CHANNEL 03-ADAPTATION OF FUEL CONSUMPTION DISPLAY .

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