Golf GL L4-2.0L (AVH) (2002)
Brake Signal: Testing and Inspection
Signal From Brake Light Switch and Brake Pedal Switch, Checking
Special tools and equipment
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V.A.G 1551 scan tool or 1552 scan tool with cable VAG 1551/3
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Test box VAG 1598/31
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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
Check conditions
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All fuses must be OK.
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The battery voltage must be at least 11.5 V.
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All electrical consumers, e.g. lights and rear window heating must be switched off
Test sequence
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Connect the V.A.G 1551 scan tool ((VAG 1552). Then switch ignition on and select engine control module with the "Address word" 01. See:
Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.
Indicated on display:
Read measuring value block
Input display group number XXX
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Press keys 0, 6 and 6 for "display group 66" and confirm with Q key.
Indicated on display:
Read measuring value block 66
->
1
2
3
4
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Observe display in display zone 2: (3rd and 4th positions from left)
Specification: x x 0 0
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Depress brake pedal fully and observe display in display zone 2.
Specification: x x 1 1
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Press the -> key.