A4 Sedan L4-2.0L Turbo (BPG) (2005)
Specified resistance 1.5 Ohms max.
If the specification is not obtained:
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
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Using multimeter V.A.G 1526 B or equivalent, check Engine Coolant Temperature (ECT) Sensor G62 electrical connector terminals 1+2 for
resistance.
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Area A: Resistance values for temperature range 0 to 50 degrees C.
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Area B: Resistance values for temperature range 50 to 100 degrees C.
Read-out examples:
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30 degrees C is in range A and corresponds to a resistance of 1.5 to 2.0 k Ohms
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80 degrees C is in range B and corresponds to a resistance of 275 to 375 Ohms
If the specification is not obtained:
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Replace Engine Coolant Temperature (ECT) Sensor G62.
If the specification is obtained:
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Replace the Engine Control Module (ECM) J623.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.
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End diagnosis and switch the ignition off.