RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Using a Multimeter , check the Throttle Valve Control Module J338 electrical harness connector terminals to the Motronic Engine Control
Module (ECM) J623 electrical harness connector T60 terminals for an open circuit.
Throttle Valve Control
Motronic Engine Control Module
Module J338 electrical harness
(ECM) J623 electrical connector
connector terminals
T60 terminals or test box sockets
1
27
2
28
3
15
4
12
5
30
6
29
Specified value: 1.5 Ohms max.
If the specification is not obtained:
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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND) or an open circuit.
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was not OK:
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Replace Motronic Engine Control Module (ECM) J623.
Final procedures
After 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. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive
Cycles and Readiness Codes
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End of diagnosis.