Jetta GLS L4-1.8L Turbo (AWP) (2002)
Engine Control Module: Testing and Inspection
Control Module Voltage Supply, Check
Special tools and equipment
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VAG1551 scan tool or VAG1552 mobile scan tool with VAG1551/3B cable
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VAG1598/31 test box
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VAG1526 hand multimeter or VAG1715 multimeter
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VAG1594 adapter set
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Wiring diagram
Check conditions
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The battery voltage must be at least 11.5 V.
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All fuses must be OK.
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Alternator OK, checking.
Test sequence
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Connect VAG1551 scan tool (VAG1552). Start engine and select "Address word" 01 of engine control module. Engine must be running at idling
speed. (Connecting scan tool and selecting engine control module). Refer to "VAG1551 Scan Tool See: Computers and Control Systems/Tools
and Equipment
Indicated on display:
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 8 for function "Read measured value block" and confirm entry with Q key.
Indicated on display
Read measured value block
HELP
Input display group number XXX
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Press keys 0, 0 and 4 for "Display group number 4" and confirm entry with Q key.
Indicated on display: (1 to 4 = Display zones)
Read measured value block 4
->
1
2
3
4
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Read off figure displayed in display zone 2.
Specification: At least 11.5 V
-
Press -> key.
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Press keys 0 and 6 for "End data transfer" function and confirm input with Q key.
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Switch ignition off.