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Home >> Audi >> 1994 >> 100, S, CS Sedan V6-2.8L (AAH) >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Diagnosis Via A/C Control Head >> A/C Control Head on Board Diagnostic (OBD) Display, Checking
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A/C Control Head on Board Diagnostic (OBD) Display, Checking

In addition to A/C system On Board Diagnostic (OBD) using the VAG 1551 Scan Tool (ST), the A/C control head contains a 61-channel OBD display which can be accessed without the use of special tools.




Starting display
- Switch ignition ON or start engine.
- Press and hold down RECIRCULATION button -1-.
- Press and hold down upper AIR DISTRIBUTION button -2-.
- Release both buttons.
"01c" will be displayed ( "01c" indicates channel 1, "02c" indicates channel 2, etc. )

To select a different channel:
- Press temperature "+" button to go to next higher channel.
- Press temperature "-" button to go to next lower channel.

To call up information about a particular channel:
- Select desired channel.
- Press RECIRCULATION button -1-.

To leave memory display:
- Press AUTO button, or
- Switch ignition OFF.
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