Passat Sedan 4Motion V6-3.6L (BLV) (2007)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature (ECT) Sensor, Checking
Engine Coolant Temperature (ECT) Sensor, Checking
NOTE: Use only gold-plated terminals when servicing terminals in the harness connector.
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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Fuses on E-box in engine compartment, left side, must be OK.
NOTE: Fuses on this fuse holder are labelled "SB" in the wiring diagram.
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Fuses on fuse holder in instrument panel, left side, must be OK.
NOTE: Fuses on this fuse holder are labelled "SC" in the wiring diagram.
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Battery voltage must be at least 11.5 Volts.
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Ground (GND) connections between engine and chassis must be OK.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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For vehicles with automatic transmission, selector lever must be in -P-.
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Engine must be cold.
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Ignition switched off.
Function test
Observe safety precautions.
Observe rules for cleanliness.
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Connect diagnostic tester.
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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 5 ($5): Coolant temperature".
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Check specified value of coolant temperature:
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Start engine and let run at idle. The temperature must climb uniformly
NOTE: