Eurovan V6-2800cc 2.8L (AES) (2000)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature Sensor, Checking
Special tools and equipment
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VAG 1551/1552 Scan Tool using VAG 1551/3 adapter cable
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VAG 1598/18 Test Box
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Fluke 83 multimeter (or equivalent)
-
VW 1594 Adapter kit
-
Wiring diagram
NOTE: If an engine reaches operating temperature while stationary or takes too long to reach operating temperature due to unfavorable conditions, this
can lead to DTC P0116 or P0125 being stored in DTC memory. If so, erase DTC memory and bring the engine to operating temperature during a test
drive.
Test conditions
-
Engine cold
Test sequence
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Connect VAG 1551 (VAG 1552) Scan Tool. Refer to Scan Tool Testing/VAG 1551 Scan Tool See: Powertrain Management/Computers and
Control Systems/Testing and Inspection
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With ignition switched on but engine not running, press buttons -0- and -1- to select "Engine electronics" address word 01.
Display will appear as shown
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select "Read measuring value block".
-
Press -Q- button to enter selection.
Display will appear as shown
Read measuring value block
HELP
Input display group number XXX
-
Press buttons -0-, -0- and -1- to select "Display group number 1".
-
Press -Q- button to enter selection.
Display will appear as shown (1 to 4 = Display fields)
Read measuring value block 1
->
1
2
3
4
-
Check specification for Engine Coolant Temperature sensor (Display field 2).
The temperature must match the specified values.
NOTE:
-
The display on the scan tool jumps by 1.5 °C.
-
If irregular engine running occurs in certain temperature ranges and the temperature figure does not increase without interruption, the temperature
signal is temporarily interrupted and the sensor must be replaced.
Evaluating display group 1