Cabrio GLX L4-2.0L (ABA) (2001)
Electronic Throttle Control Module: Testing and Inspection
Throttle Valve Control Module J338, Checking
Throttle Valve Control Module, Checking
NOTE: If the throttle valve control module is replaced, the new control module must without fail be adapted to the engine control module.
On vehicles installed with an automatic transmission the transmission control module must also be adapted:
Special tools and equipment
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VAG 1551 Scan Tool or VAG 1552 with cable VAG 1551/3
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Test box VAG 1598/22
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Hand multimeter VAG 1526 or multimeter VAG 1715
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Adapter set VAG 1594
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Wiring diagram
Test conditions
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Throttle valve not damaged or dirty.
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Throttle cable adjustment OK, checking
Checking idling switch
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Connect VAG 1551 Scan Tool ((VAG 1552). Then switch ignition on and select engine control module using "Address word" 01. (Connecting
scan tool and selecting engine control module See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Manufacturer's Scan Tool/Connecting VAG Scan Tool 1551/1552).
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 8 for function "Read Measuring Value Block" and confirm entry with Q key.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press keys 0, 5 and 4 for "Display group number 54" and confirm entry with Q key.
Indicated on display: (1 to 4 = Display zones)
Read Measuring Value Block 54
->
1
2
3
4
-
Check operating mode display in display zone 2.
Display: Idling
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Slowly open throttle valve through range of travel to stop. Open valve further, 4th position from left must jump to part throttle
Display: Part throttle
Display constantly remains on one operating condition:
Display
Cause
Part throttle
Open circuit or short to B+
Idling
Short to Ground
Continuation of check when display shows part throttle