Passat V6-2.8L (ATQ) (2004)
If indication remains at approx. 143 degrees C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Checking wiring
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Connect test box to control module wiring harness. connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
Vehicles with engine code AHA
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Check wires between test box and 4-pin connector for open circuit according to wiring diagram.
Terminal 1 + socket 53
Terminal 3 + socket 67
Wire resistance: max. 1.5 ohms
Vehicles with engine code ATQ
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Check wires between test box and 4-pin connector for open circuit according to wiring diagram.
Terminal 3 + socket 108
Terminal 4 + socket 93
Wire resistance: max. 1.5 ohms
Continuation for all vehicles
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: Infinite ohms
If no malfunctions are found in wires:
Vehicles with engine code AHA