Jetta L4-1.9L DSL Turbo (AAZ) (1997)
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Disconnect harness connector from brake pedal switch -1-
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Measure resistance between switch terminals
Specification:
Brake pedal not depressed: less than 10 Ohms.
Brake pedal depressed: Infinite Ohms.
If specification not obtained:
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Replace brake pedal switch F47
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Display the readiness code
If DTC memory was erased:
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Create readiness code again
If specification obtained:
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Connect VAG 1598/18 Test Box to ECM harness connector
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Check wiring between Test Box and harness connector for open circuit using Wiring diagram:
terminal 1 + socket 20
terminal 2 + socket 33
Wire resistance: max. 1.5 Ohms.
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Check wires for short to one another
Specification: Infinite Ohms
Right-hand display does not change
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Press -> button
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Press 0 and 6 buttons to select Function 06 "end data transfer"
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Press Q button to enter input
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Switch OFF ignition
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Switch Fluke 83 multimeter to 20 Volt range
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Connect multimeter between Test Box sockets 44 + 1 using jumper wires from VW 1594 adaptor kit and observe voltage display
Brake pedal not depressed: 0 Volts.