TT Roadster L4-1.8L Turbo (AWP) (2003)
Leak Detection Pump: Testing and Inspection
With Generic Scan Tool
Check Leak Detection Pump (LDP)
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Leak detection pump (LDP) -V144- must be OK:
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Ignition switched off.
Test sequence
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Remove right front wheel
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Remove front right wheelhousing liner.
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Disconnect connector of Leak detection pump (LDP) -V144- (arrow).
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Connect multimeter for resistance measurement as follows.
Leak detection pump (LDP) -V144-
Specified value
Terminal
1 + 3
640 ... 720 Ohm
2 + 3
15 ... 17 Ohm
If specified values are not obtained:
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Replace Leak detection pump (LDP) -V144-, item 4
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Audi
Drive Cycle/Readiness Code/With Generic Scan Tool/Readiness Code, Generating
If specified values are obtained:
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Connect VAG1598/31 test box to connectors of wiring harness. Ground (GND) clip (arrow) at test box must be clipped to battery minus. Do not
connect Engine Control Module (ECM).