Golf GLS L4-2.0L (AZG) (2001)
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer's Scan Tool
Oxygen Sensor Heater For Heated Oxygen Sensor (H02S) -G39-, Checking
NOTE:
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Vehicle must be raised before connector for oxygen sensor is accessible.
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When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Special tools and equipment
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V.A.G1551 scan tool (or VAG1552 mobile scan tool) with VAG1551/3 cable
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VAG1598/31 test box
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Multimeter Fluke 83 or equivalent
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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All fuses must be OK.
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Battery voltage must be at least 11.5 volts.
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Fuel Pump (FP) relay must be OK.
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Connect V.A.G 1551 scan tool (VAG1552). Start engine and select the Engine Control Module (ECM) using address word 01. See: Computers
and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display:
Read measuring value block
Enter display group number XXX
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Press buttons -0-, -4- and -1- to select "Display group number 41". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 41
->
1
2
3
4
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Let engine run at idle for 2 minutes.
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Check the status of the oxygen sensor heater in display field 2: