Allroad Quattro V8-4.2L (BAS) (2004)
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Remove instrument cluster.
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Connect VAG1598A test box to blue 32-pin multi-pin harness connector using VAG1598/25 adapter.
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Connect multimeter for resistance measurement between terminal 25 of VAG1598/25 test box and the terminal for consumption signal at test box
for Engine Control Module (ECM).
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Specification: smaller than 2 ohm
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Connect multimeter for resistance measurement between socket for consumption signal at test box for Engine Control Module (ECM) and to
Ground (GND).
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Specification: larger than 9 Mohm
If the specified values are reached, the wire connection is OK
B - 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.
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Switch ignition off.
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Connect the respective test box to the Engine Control Module (ECM).
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Remove instrument cluster.
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Connect VAG1598A test box to blue 32-pin multi-pin harness connector using VAG1598/25 adapter.
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Connect multimeter for resistance measurement between terminal 25 of VAG1598/25 test box and the terminal for consumption signal at test box
for Engine Control Module (ECM).
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Specification: smaller than 2 ohm.
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Connect multimeter for resistance measurement between socket for consumption signal at test box for Engine Control Module (ECM) and to
Ground (GND).
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Specification: larger than 9 Mohm.
If the specified values are reached, the wire connection is OK.
C - The consumption display has no logical or a fluctuating consumption value.
The consumption display deviates from the actual fuel consumption.
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Perform adaptation of consumption display.