RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J623.
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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 Module
Motronic Engine Control
J338 electrical harness
Module (ECM) J623 electrical
connector terminals
connector 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: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.
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End of diagnosis.