Jetta Sedan L4-1.9L DSL Turbo (BEW) (2005)
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Connect pressure tester VAS 5187 as shown.
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Start engine and run at idling speed.
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Connect Vehicle diagnosis, Testing and Information System VAS 5051 and select operating mode "Vehicle self diagnosis". Then select engine
control module with Address word "01".
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Press diagnosis function "08-Read measured value block".
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Enter display group "2" using number block and confirm entry with Q key.
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Read engine idling speed in display zone 1.
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Increase engine speed to 1500 rpm.
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Observe pressure indicated on pressure gauge.
Specification: min. 3.5 bar
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Press <- key.
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Press function "06-End output".
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Switch off ignition.
If the specification is not obtained:
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Replace tandem pump.
NOTE: After removing pressure tester, tighten plug to 25 Nm. Always replace seal.