Jetta Wagon L4-1.9L DSL Turbo (ALH) (2003)
Engine Temperature Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Engine Coolant Temperature (ECT) Sensor -G62-, Checking
Special tools and equipment
-
Scan Tool VAG 1551 or vehicle system tester
-
VAG 1552 with cable VAG 1551/3
-
Test box VAG 1598/31
-
Hand multimeter VAG 1526 or multimeter VAG 1715
-
Adapter set VAG 1594
-
Wiring diagram
Test conditions
-
Engine must be cold.
Test sequence
-
Connect VAG 1551/1552 (Connecting scan tool and selecting engine electronics control module.) Run engine at idle speed and press buttons -0-
and -1- to select "Engine electronics" address word 01. See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Manufacturer's Scan Tool/Connecting VAG 1551 Scan Tool
Indicated on display:
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- for the function "Read measured value block" and confirm entry with -Q- button.
Indicated on display:
Read measured value block
Enter display group number XXX
-
Press buttons -0-, -0- and -7- for "Display group number 7" and confirm entry with -Q- button.
Indicated on display:
Read measured value block 7
->
15.4 degree C
15.9 degree C
16.7 degree C
-
Observe coolant temperature figure in display field 4. The temperature figure must increase uniformly and without interruption.
-
In case of faults the fuel temperature is displayed as a substitute.
-
If no realistic display appears in display field 4 or the fuel temperature is displayed as a substitute. Check coolant temperature sensor and wiring
connections to sensor as follows.
-
Press the -> button.
-
Press buttons -0- and -6- for the function "End output" and confirm entry with the -Q- button.
-
Switch off ignition.
-
Disconnect the connector from coolant temperature sensor.
-
Measure resistance between sender contacts C -1- +D -3-.