TT Quattro Roadster V6-3.2L (BHE) (2005)
Leak Detection Pump: Testing and Inspection
With Generic Scan Tool
Leak Detection Pump, Checking
Special tools, testers and auxiliary items required
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Multimeter.
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Wiring diagram.
Test requirements
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Fuse S234 OK.
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The Fuel Pump (FP) Relay J17 OK.
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The ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/General Diagnosis
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Remove the left rear wheel housing liner.
Start diagnosis
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Remove the right front wheel.
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Remove the right front wheel housing liner.
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Disconnect the Leak Detection Pump (LDP) V144 electrical harness connector - 3 -.
Checking internal resistance
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Using a Multimeter, check the Leak Detection Pump (LDP) V144 for resistance as follows:
Leak Detection Pump (LDP)
Specified values
catalytic converter harness
connector terminals
1 + 3
640 to 720 Ohms
2 + 3
15 to 17 Ohms
If any of the specifications are not obtained:
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Replace the Leak Detection Pump (LDP) -V144-.
If the specified values are obtained: