Golf GL L4-2.0L (AVH) (2002)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
With Manufacturer's Scan Tool
Engine Coolant Temperature (ECT) Sensor -G62-, Checking
NOTE:
If a DTC relating to the Engine Coolant Temperature (ECT) sensor -G62- is stored in DTC memory, the Engine Control Module (ECM)
uses a replacement value when starting the engine (starting temperature replacement value). After this, the temperature rises according to a
mapping specification stored in the Engine Control Module (ECM). For a warm engine, a fixed replacement value is indicated after a
certain period of time. This fixed replacement value is also dependent on the intake air temperature.
Special tools and equipment
-
V.A.G1551 scan tool (or VAG1552 mobile scan tool) with VAG1551/3 cable
-
VAG1598/31 test box
-
Multimeter Fluke 83 or equivalent
-
VAG1594 connector test kit
-
Wiring diagram
Test requirement
-
Engine must be cold.
Test sequence
-
Connect V.A.G 1551 scan tool (VAG1552). Then switch ignition on and select the Engine Control Module (ECM) using address word 01 See:
Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display:
Read measuring value block
Enter display group number XXX
-
Press 0, 0 and 4 for the function "display group number 4", and then press Q to exit from input mode.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 4
->
1
2
3
4
-
Read coolant temperature value in display field 3.
Specification: approx. coolant temperature
If specified value is not obtained:
-
Continue test according to the following table: