Passat Sedan V6-2771cc 2.8L DOHC (AHA) (1998)
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Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AHA
Vehicles with engine code ATQ
Continuation for all vehicles
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Also check wires for short circuit to B+ or Ground (GND).
Specified value: Infinity Ohms
If no malfunctions are found in wires:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer's Scan Tool
Oxygen Sensor (O2S) and Oxygen Sensor (O2S) control behind TWC, checking
Special tools and equipment
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VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable
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VAG1598/22 test box
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Multimeter US1119 (Fluke 83 or equivalent)
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VW1594 connector test kit
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Wiring diagram
Checking requirements
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Throttle valve control module adapted to ECM.
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Exhaust system free of leaks
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Engine coolant temperature at least 85°C (185°F) See VAG1551 scan tool function 08, display group 004, display field 3
Checking function
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Connect VAG1551 or VAG1552 scan tool and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at
idle), See: Powertrain Management/Computers and Control Systems/Testing and Inspection
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, and press -Q- button to confirm input.
Indicated on display