Golf L4-1.9L DSL Turbo (ALH) (1999)
Fuel Temperature Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Fuel Temperature Sensor, Checking
NOTE: Only gold-plated contacts must be used when repairing terminals in the connector to the injection pump metering unit.
Special tools and equipment
-
V.A.G 1551/1552 Scan tool with adapter cable V.A.G 1551/3
-
Test box VAG 1598/22 (through my 1999)
-
Test box VAG 1598/31 (from my 2000)
-
Digital multimeter US1119 (Fluke 83 or equivalent)
-
Adapter set VAG 1594
-
Wiring diagram
Test sequence
-
Connect V.A.G 1551/1552 (Connecting scan tool and selecting engine electronics control module.) See: Computers and Control Systems/Testing
and Inspection
-
Run engine at idle speed and press buttons - 0- and -1- to select "Engine electronics" address word 01.
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select "Read measured value block" function 08 and confirm entry with -Q- button.
Indicated on display:
Read measured value block
HELP
Input display group number XXX
-
Press buttons -0-, -0- and -7- to select "Display group number 7" and confirm entry with -Q- button.
Indicated on display
Read measured value block 7
->
15.4 °C
15.9 °C
16.7 °C
-
Check fuel temperature value in display field 1.
-
The temperature value must be approx. ambient temperature.
If a malfunction is present a constant -5.4 °C will be displayed for the fuel temperature.
-
Press the -> button.
-
Press buttons -0- and -6- to select "End output" function 06 and confirm entry with -Q- button.
-
Switch ignition off.
If display field 1 appears unrealistic or a substitute temperature of -5.4 °C is displayed, check fuel temperature sensor and wiring as follows: