Beetle L4-2.0L (AEG) (2000)
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Check wires between test box and 6-pin connector (to control module) for open circuit according to wiring diagram.
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Terminal 1+socket 70
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Terminal 2+socket 71
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Terminal 5 + socket 51
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Terminal 6 + socket 52
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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
If no malfunctions are found in wires:
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Replace Heated Oxygen Sensor (HO2S) 1 Bank 1 -G39- before catalytic converter, item 2.
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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
With Manufacturer Scan Tool
Oxygen Sensor and Oxygen Sensor Control Before Three Way Catalyst, Checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool using VAG 1551/3 Adaptor cable
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VAG 1598/22 Test Box
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Fluke 83 multimeter
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VW 1594 Adaptor kit
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Wiring diagram
Requirements
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Engine Coolant Temperature must be 85 °C minimum See Display group 04, Display field 3
Functional check
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Connect VAG 1551/1552 Scan Tool. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks" See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
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Start engine and let idle
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Press 0 and 1 buttons to select "Engine Electronics" address word 01.
Indicated on display (example only)
06A906018AB Motronic M5.9.2 HS V06 ->
Coding 00000
WSC 00000
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Press -> button.
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press 0 and 8 buttons to select "Read Measuring Value Block" function 08.
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Press Q button to enter input.
Indicated on display
Read measuring value block