RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Using a Multimeter , check the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector terminals to the Motronic Engine
Control Module (ECM) J623 electrical harness connector T60 terminals for an open circuit according to the wiring diagram.
Engine Coolant Temperature
Motronic Engine Control Module
(ECT) Sensor G62 electrical
(ECM) J623 electrical connector
harness connector terminals
T60 terminals or test box socket
1
10
2
14
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 (+), Ground (GND), or an open circuit.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
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Replace the 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. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
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End of diagnosis.