Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
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Disconnect 8-pin harness connector -1- for throttle valve control module (arrow -2-).
When display shows part throttle:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06, and press -Q- button to confirm input.
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Switch ignition off.
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Replace throttle valve control module, item 16. See: Computers and Control Systems/Electronic Throttle Control Module/Service and Repair
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Carry out adaptation of throttle valve control module to ECM.
When display shows idle:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06, and press -0- button to confirm input.
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Switch ignition off.
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Check voltage supply to throttle valve control module and wiring to ECM.
If the voltage supply and wiring is OK:
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Replace Motronic ECM -J220-. See: Computers and Control Systems/Engine Control Module/Service and Repair
Throttle drive -G186- and angle sensor for throttle drive, -G187- checking
Check conditions
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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. Refer to "On Board
Diagnostic (OBD II)". See: Computers and Control Systems/Testing and Inspection
Checking
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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). Refer to "On Board Diagnostic (OBD II)". See: 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
Read Measuring Value Block
HELP
Input display group number XXX
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Press buttons -0-, -5- and -5- to input display group number 55 (055), and press -Q- button to confirm input.
Indicated on display (1-4 display fields)
Read Measuring Value Block 55
->
1
2
3
4
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Compare display with specified values for idle air control (display fields 1-4):