A8L Quattro Sedan W12-6.0L (BSB) (2005)
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Start engine and run at idle speed. Specification: at least 7.0 V
If specification is obtained:
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Switch ignition off.
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Erase DTC memory of Engine Control Module => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Diagnostic Modes 01 - 09, Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code => [ Readiness Code, Generating ] See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
If specification is not obtained:
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Connect multimeter to terminal 3 of connector to Engine Control Module + Ground (GND) for voltage measurement. Specification: at least 11.0 V
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Switch ignition off.
If specification is not obtained:
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Check voltage supply at 6-pin connector terminal 3 to Motronic Engine Control Module (ECM) Power Supply Relay 2 (J670) according to wiring
diagram:
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Erase DTC memory of Engine Control Module => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Diagnostic Modes 01 - 09, Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code => [ Readiness Code, Generating ] See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
If specification is obtained:
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Check Ground (GND) activation of respective oxygen sensor heater.