Golf L4-2.0L (ABA) (1996)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
ENGINE COOLANT TEMPERATURE SENSOR, CHECKING
Special tools, testers and auxiliary items
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VAG 1551/1552 scan tool with VAG 1551/3 adapter cable
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VAG 1598/18 test box
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Multimeter (Fluke 83 or equivalent)
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Connector test kit VW 1594
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Wiring diagram
NOTE: If the engine is warmed to operating temperature with the vehicle stationary, and the time taken to reach operating temperature is too long, it
can lead to DTC P0116 or P0125 being stored in DTC memory In this case, erase DTC memory and bring engine to operating temperature during a test
drive.
Test conditions
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Engine cold
Test sequence
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Connect VAG 1551/1552 scan tool and select "Engine Electronics" address word 01. When doing this the ignition must be switched on. Refer
to"On-Board Diagnostics II With VAG 1551". See: Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
-
Press buttons -0-, -0- and -1- for display group 001 and press -Q- button to confirm input.
Indicated on display (1-4 = Display fields)
Read Measuring Value Block
1 ->
1
2
3
4
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Check the specification for engine coolant temperature sensor (display field 2).
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Start engine and run at idle speed.
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The temperature value must increase uniformly