Jetta Sedan V6-2.8L (BDF) (2003)
Electronic Throttle Control Module: Testing and Inspection
With Manufacturer's Scan Tool
Throttle Valve Control Module -J338- Checking
NOTE:
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Only gold plated terminals may be used to service the terminals in the connector of the throttle valve control module -J338-.
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Components of throttle valve control module -J338-: Throttle drive (power accelerator actuation) -G186-, Angle sensor -1- for throttle drive
(power accelerator actuation) -G187- and Angle sensor -2- for throttle drive (power accelerator actuation) -G188-.
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If the throttle valve control module -J338- is replaced, the new control module must be adapted to the Motronic Engine Control Module (ECM)
-J220-.
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On vehicles installed with an automatic transmission the transmission control module must also be adapted:
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551 Scan tool (or VAG 1552) with VAG 1551/3 adapter cable
NOTE: All functions which could previously be performed with VAG 1551/1552 can also be performed with the VAS 5051.
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VAG 1526 Hand multimeter or VAG 1715 multimeter
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VAG 1594 Adapter set
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VAG 1598/31 Test box
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Electrical Wiring Diagrams
Test prerequisites
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The fuses must be OK.
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The battery voltage must be at least 11.5 V.
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All electrical accessories, e.g. lights and rear window heating must be switched off.
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If the vehicle is equipped with air conditioning, it must be turned off.
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Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
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Fuel Pump (FP) Relay -J17- must be OK., checking:
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Engine Coolant Temperature (ECT) must be at least 85 degrees C, See display group 1, display zone 2.
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Throttle valve not damaged or contaminated/dirty.
Test sequence
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Connect VAG 1551 Scan tool (or VAG 1552). Then switch ignition on and select Motronic Engine Control Module (ECM) -J220- with the