RS 6 V8-4.2L Turbo (BCY) (2003)
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Activate basic setting by touching key -A-.
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Check display in zones -3- and -4-.
Display Group 002
NOTE: Values displayed in zones 3 and 4 must be roughly equal.
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Terminate function "04 - Basic setting" by touching <- key.
Checking power supply for mass air flow sensor
Requirements
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Fuse for mass air flow sensor OK
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Fuel pump relay OK
NOTE: The mass air flow sensor is supplied with power by the fuel pump relay.