A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Installing.
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Using a Multimeter, check the Engine Control Module (ECM) Power Supply Relay (J271) socket 3/86 to the Engine Control Module (ECM)
(J623) electrical harness connector T94 terminal 92 for resistance.
Specified value: 3.2 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 Engine Control Module (ECM) Power Supply Relay (J271) socket 4/85 to the Engine Control Module (ECM)
(J623) electrical harness connector T94 terminal 69 for voltage.
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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 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 Engine Control Module (ECM) (J623 ). Refer to => [ ECM, Removing and Installing ] See: Service and Repair/ECM, Removing and
Installing.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. => [ Diagnostic Mode 03 - Read DTC Memory ] See: Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. => [ Diagnostic Mode 04 - Erase 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. => [ Readiness Code ] See: Testing and Inspection/Monitors, Trips, Drive Cycles and