Jetta L4-1.8L Turbo (AWP) (2004)
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Change to display group 56 as follows:
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Press C key.
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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 to 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/With Manufacturer's Scan Tool/Evaluating Measuring Value Blocks/Display
Group 50 to 69, 99, 107 (Speed Regulation)", See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan
Tool Testing and Procedures/With Manufacturer's Scan Tool/Evaluate Measuring Value Blocks/Display Groups 50 to 69 (Speed Regulation)
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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 to 820 RPM
Automatic transmission 640 to 760 RPM
NOTE: During idling check the EVAP canister purge regulator 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, Refer to "Engine Control Module, Adapting to Throttle Valve Control
Module" See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and Repair
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Carry out test drive.
Observe the valid safety precautions when carrying out a road test See: Powertrain Management/Computers and Control Systems/Service
Precautions/Technician Safety Information
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Again check the 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/With Manufacturer's Scan Tool/Engine Operating Mode Check", See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Engine Operating Conditions,
Checking
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Check the intake air system for unmetered air. Refer to "Computers And Control Systems.Testing and Inspection/Procedures/Component
Tests/Intake System,Checking for Leaks (Unmetered Air)" See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Intake Air System, Checking For Leaks (False/Unmetered Air)/With Manufacturer's Scan
Tool