New Beetle GL L4-2.0L (AZG) (2002)
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes
If specified value is obtained:
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Check Ground (GND) activation of oxygen sensor heater.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Terminal 4 +
socket 5: Wire resistance: max. 1.5 Ohms
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Also check wires for short circuit to B+ and Ground (GND). Specified value: Infinite Ohms
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Check wire between 6-pin connector terminal 3 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram. Wire
resistance: max. 1.5 Ohms
If no malfunctions are found in wires:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer Scan Tool
Heated Oxygen Sensor (HO2S) For Oxygen Sensor Before Catalyst, Checking
NOTE:
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In order to reach the connector of the oxygen sensor you must lift the vehicle.
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Only gold-plated terminals must be used to repair the terminals in the oxygen sensors connectors.
Special tools and equipment
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Scan tool VAG 1551 or vehicle system tester V.A.G 1552 with cable VAG 1551/3B
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Test box V.A.G 1598/31
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Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
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Adapter set V.A.G 1594
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Wiring diagram
Test conditions