Jetta L4-2.0L (AEG) (2000)
Brake Switch (Cruise Control): Testing and Inspection
Brake Light Switch and Brake Pedal Switch Signal Check
Special tools and equipment
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V.A.G1551/1552 Scan Tool (ST) with VAG1551/3 adapter cable
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VAG1598/22 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 sequence
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Connect V.A.G1551 (VAG1552) Scan Tool (ST). Refer to "Scan Tool Testing/VAG1551/Functional Check" under "Powertrain
Management/Computers and Control Systems/Testing and Inspection See: Powertrain Management/Computers and Control Systems/Testing and
Inspection
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Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01.
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
HELP
Input display group number XXX
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Press buttons -0-, -6- and -6- to input display group number 66 (066) and press -Q- button to confirm input.
Indicated on display: (1-4 = display fields)
Read Measuring Value Block 66
->
1
2
3
4
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Observe display in display field 2 (3rd and 4th positions from left):
Specified value: x x 0 0
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Depress brake pedal and observe display in display field 2.
Specified value: x x 1 1
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
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Turn off ignition.
If the display does not change:
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Disconnect 4-pin harness connector from brake light switch and brake pedal switch.
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Measure resistance between terminals -1- + -4- of switch.