Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
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Disconnect 8-pin harness connector to Throttle Body Control Module.
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Switch Fluke 83 Multimeter to resistance range
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Measure throttle valve positioner resistance between connector terminals 1 + 2.
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Specification: 3 to 200 Ohms
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Check Throttle Body Control Module Voltages supply and wiring to Control Module as described below.
If NO malfunction detected:
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Replace Throttle Body Control Module J338.
Evaluating Disply group 55
Significance of 4 position Display
Throttle Position Sensor G69, Checking
Test conditions:
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Coolant temperature at least 85 °C.
Test sequence
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Connect VAG 1551/1552 Scan Tool
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Switch ON ignition
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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