A8 Sedan V8-3.7L (AEW) (1997)
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Connect VAG1598/19 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG1598/19
Test Box, Connecting" See: Powertrain Management/Computers and Control Systems/Testing and Inspection
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Connect VAG1527B LED voltage tester between ECM/test box sockets D9 (B+, terminal 30) and B11.
LED must go out when a transmission drive range is selected.
If LED does not go out, and the display is not OK:
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Disconnect harness connector from multi-function Transmission Range (TR) switch.
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Check wiring for open or short circuits.
If wiring is OK:
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Check multi-function TR switch.
