TT Quattro Roadster V6-3.2L (BHE) (2005)
(ECM) J220 electrical harness connector terminal 80 for resistance.
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Using a Multimeter, check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 2 to Motronic Engine Control Module
(ECM) J220 electrical harness connector terminal 25 for resistance.
Leak Detection Pump (LDP)
Motronic Engine Control Module
-V144- electrical connector
(ECM) J220 harness connector
terminals
terminals or test box sockets
1
80
2
25
Specified value: 1.5 Ohms max.
If the specification is not obtained:
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Check the wiring for a short circuit to Battery positive (+), Ground (GND) or an open circuit.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is found in wiring:
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Erase the DTC memory. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 -
Erase DTC Memory
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Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Readiness Code
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End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
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Replace the Motronic Engine Control Module (ECM) J220.
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Assembly is performed in the reverse of the removal.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03 -
Read DTC Memory
2. If necessary, erase the DTC memory. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic
Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.
End of diagnosis