A8L Quattro Sedan W12-6.0L (BSB) (2005)
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Generate readiness code => [ Readiness Code, Generating ] See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
If specification is obtained:
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Check wires to Engine Control Module according to wiring diagram.
1Checking wires to Engine Control Module (ECM)
Cylinder bank 1
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Connect test box to Engine Control Module (ECM) (J623) wiring harness on connecting test box for wiring test, refer to Repair Manual,
Cylinder bank 2
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Connect test box to Engine Control Module (ECM) 2 (J624) wiring harness on connecting test box for wiring test.
Cylinder bank 1 and 2
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Check wires between test box and 2-pin connector to Engine Control Module for open circuit according to wiring diagram. Wiring resistance:
max. 1.5 ohms
Cylinder bank 1
Cylinder bank 2
Cylinder bank 1 and 2
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Check the wire for short circuit to B+ and Ground (GND). Specification: infinite ohms
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Check wire between 1-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay (J271) for open circuit
according to wiring diagram. Wiring resistance: max. 1.5 ohms
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Erase DTC memory of Engine Control Module => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09, Diagnostic mode 4: Reset/erase diagnostic
data.