A3 Quattro V6-3.2L (BUB) (2008)
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J220.
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Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 3/86 to the Motronic Engine Control
Module (ECM) J220 electrical harness connector T121 terminal 62 for resistance.
Motronic Engine Control Module
Motronic Engine Control
(ECM)Power Supply Relay J271
connector T121 terminal or
socket terminal
test box socket
3/86
62
Specified value: 2.0 Ohms Max.
If the specification was not obtained:
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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
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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 found in the wiring:
Checking activation
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Switch the ignition on.
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Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 4/85 to the Motronic Engine Control
Module (ECM) J220 electrical harness connector T121 terminal 23 for voltage.
Motronic Engine Control Module
Motronic Engine Control Module
(ECM) Power Supply Relay J271
(ECM) J220 electrical connector
socket terminal
T121 terminal or test box socket
4/85
23
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Switch the ignition off.
Specified value: 0.5 V Max.
If the specified value was obtained:
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Replace the Motronic Engine Control Module (ECM) Power Supply Relay J271.
If the specified value was not obtained:
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Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
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Check the wiring connection for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was not OK:
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Replace the Motronic Engine Control Module (ECM) J220.
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. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
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End of diagnosis.