Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
Special tools, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool with VAG 1551/3B 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
Checking conditions
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The Engine Control Module must be matched to the Throttle Body Control Module.
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Engine Coolant Temperature must be 85 °C minimum = Display group 04, Display zone 3.
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Exhaust system between Three Way Catalyst and cylinder head must be leak tight
Functional check
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Connect VAG 1551/1552 Scan Tool, Refer to "Scan Tool Testing", See: Computers and Control Systems/Testing and Inspection/Reading and
Clearing Diagnostic Trouble Codes/Scan Tool Connecting
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Start engine and let idle
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Press 0 and 1 buttons to select "Address word" 01 "Engine electronics"
Display will appear as shown
Rapid data transfer
HELP
Select function XX
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Press 0 and 8 buttons to select Function 08: "Read measuring value block"
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Press Q button to enter input
Display will appear as shown
Read measuring value block
HELP
Input Display group number XXX
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Press 0, 3 and 6 buttons to select "Display group 36"
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Press Q button to enter input
Display will appear as shown (1 to 4 = Display zones)
Read measuring value block 36
->
1
2
3
4
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Observe specifications in Display zones 1 and 2 on chart.