Passat V6-2.8L (ATQ) (2004)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
With Generic Scan Tool
Engine Coolant Temperature (ECT) Sensor -G62-, Checking
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK
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Parking brake must be engaged or else daylight driving lights will be switched on.
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Engine must be cold.
Function test
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Connect diagnostic tester. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/Diagnostic Tester, Connecting
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Switch ignition on.
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Under address word 33, select "Diagnostic mode 1: Check measured values."
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Select the measuring value "PID 05: Coolant temperature".
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Check specified value of coolant temperature:
If specified value is not obtained:
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Continue test according to the following table:
If specified value is obtained:
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Start engine and let run at idle. The temperature must climb uniformly
NOTE:
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The temperature increases in increments of 1.0 degrees C.
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If the engine shows problems in certain temperature ranges and if the temperature does not climb uniformly, the temperature signal is intermittent
and the sensor should be replaced.