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Test Procedure 1. Connect scan tool. See RETRIEVING DIAGNOSTIC TROUBLE CODES . Turn ignition on, engine off. Following scan tool manufacturer's instructions, check ABS Control Module (J104) for DTCs. If no 2. Check wiring between ABS Control Module (J104) and ECM (J220) for open or short circuits. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. See Fig. 42 , 3. Check centralized matching resistor in ECM. Turn ignition off. Connect ECM to test box, leave ECM harness connector disconnected from test box. Connect Test Box (VAG 1598/31). See CONNECTING 4. If resistance is not okay, replace faulty ECM. See ENGINE CONTROL MODULE REMOVAL & INSTALLATION . After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM DTC P1683/18091: DRIVETRAIN DATA BUS - IMPLAUSIBLE SIGNAL FROM AIRBAG CONTROL Engine control module communicates with all control modules capable of transferring data via a CAN Test Requirements Ensure battery is okay. Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay is replaced, Can Data Bus OBD Interface (J533) must be coded. See CAN DATA NOTE: If a test ends with ECM replacement, before replacing ECM be certain that, all NOTE: Instrument Cluster Control Module (J285) and Can Data Bus OBD Interface
2003 Volkswagen New Beetle GLS 2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)
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