Jetta GLX V6-2.8L (AFP) (2002)
Engine Control Module: Testing and Inspection
Engine Control Module (ECM) Voltage Supply, Checking
With Manufacturer's Scan Tool
Engine Control Module (ECM) Voltage Supply, Checking
Special tools and equipment
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VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
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VAG1598/31 test box
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Multimeter (Fluke 83 or equivalent)
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VW1594 adapter set
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Wiring diagram
Test requirements
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Fuses 10 and 29 OK
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Battery (B+) voltage at least 11.5 V
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All electrical consumers (e.g. lights and window defroster) switched off
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A/C switched off
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Automatic transmission selector lever in "P" or "N" position
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Generator OK
Test sequence
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Connect VAG1551 (VAG1552) Scan Tool (ST).
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Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (when doing this engine must be running at idle).
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
Input display group number XXX
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Press buttons -0-, -0- and -4- to input display group number 4 (004) and press -Q- button to confirm input.
Indicated on display: (1-4 = display fields)
Read Measuring Value Block 4
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