Jetta L4-1.8L Turbo (AWD) (2000)
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Press keys 0, 5 and 6 for "Display group number 56" and confirm entry with Q key.
Indicated on display: (1-4 = Display zones)
System in basic setting 56
->
1
2
3
4
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Check the operating mode in display zone 4
Specification: 0x000. (Significance), Refer to "Scan Tool Testing/Measuring Value Blocks/Display Groups 50-69 (RPM Regulation)", See:
Powertrain Management/Computers and Control Systems/Testing and Inspection
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Check the specified idling speed in display zone 2.
Specification:
Manual transmission 760 RPM
Automatic transmission 700 RPM
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Check idling speed in display zone 1.
Specification:
Manual transmission 700 - 820 RPM 1)
Automatic transmission 640 - 760 RPM 1)
1)Up-to-date specifications:
NOTE: During idling check the activated charcoal filter solenoid valve and the air conditioner are switched off and the Oxygen sensor control learning
procedure is initiated.
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Press -> key.
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Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
If the idling speed is not obtained:
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Adapt the engine control module to the throttle valve control module See: Adjustments
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Carry out test drive.
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Again interrogate control module DTC memory.
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Repeat the idling check.
If the specifications are not obtained again:
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Check throttle valve control module. See: Powertrain Management/Computers and Control Systems/Electronic Throttle Control Module/Testing
and Inspection
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Check the operating condition of engine. Refer to "Scan Tool Testing/Engine Operating Modes, Checking" See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
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Check the intake air system for unmetered air. See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection