Passat Sedan 4Motion W8-4.0L (BDP) (2002)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature (ECT) Sensor, Checking
Engine Coolant Temperature (ECT) sensor, checking
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of sensor.
Recommended special tools and equipment
-
VAG1526 multimeter or VAG1715 multimeter
-
VAG1594 connector test kit
-
Wiring diagram
Test requirements
-
The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK.
-
Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) must be OK.
-
Parking brake must be engaged or else daylight driving lights will be switched on.
-
For vehicles with automatic transmission, selector lever must be in position -P-or -N-.
-
Engine must be cold.
Function test
-
Connect diagnostic tester. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Diagnostic Tester, Connecting
-
Switch ignition on.
-
Under address word 33, select "Diagnostic mode 1: Check measured values."
-
Select the measuring value "PID 05: Coolant temperature".
-
Check specified value of coolant temperature:
If specified value is not obtained:
-
Continue test according to the following table:
Indicated 1)
Cause