A6 Sedan V6-2.8L (AHA) (1998)
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Connect LED tester VAG 1527 between connector terminals 1 and 2.
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Check using output DTM and activate camshaft adjustment. Refer to "Scan Tool Testing/Output Diagnostic Test Mode (DTM) (Function 03)"
See: Powertrain Management/Computers and Control Systems/Testing and Inspection
LED must flash.
If LED does not flash or stays on continuously:
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Connect VAG 1598/22 test box to Motronic ECM harness connector and proceed as follows:Refer to "Scan Tool Testing/Scan Tool Connecting
and Initial Checks/Connecting VAG 1598/22 Test Box" See: Powertrain Management/Computers and Control Systems/Testing and Inspection
If LED does not flash:
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Check wiring from terminal 2 of connector for valve to terminal 55 of ECM/test box for continuity and short circuit to B+.
If LED stays lit constantly:
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Check wiring between valve connector terminal 2 and ECM/test box terminal 55 for short circuit to Ground.
Specified value: max. 1 Ohms.
If the wiring is OK:
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Replace Motronic ECM -J220-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.