A3 Quattro V6-3.2L (BUB) (2008)
G28 electrical harness
(ECM) J220 electrical connector
connector terminals
T121 terminals or test box sockets
1
108
2
90
3
82
Specified value: 1.5 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 wire shield for proper ground.
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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:
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Remove the Engine Speed (RPM) Sensor G28 and check the sensor wheel for proper seating, damage and run-out.
If the sensor wheel is 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: 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.