Allroad Quattro V6-2.7L Turbo (APB) (2002)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Coolant Temperature Signal, Checking
Coolant Temperature Signal, Checking
NOTE: The Engine Control Module (ECM) receives the coolant temperature signal from the Instrument cluster. When the signal is received, the charge
pressure is reduced to prevent the engine from overheating.
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG1598/31 Test Box" See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
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Check wiring from test box socket 19 to instrument cluster according to wiring diagram for an open circuit.