Jetta V6-2.8L (BDF) (2002)
If the specification is not obtained:
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Check according to the following table:
Display 1)
Cause
Approx. - 42.0 degrees C
Open circuit or short to positive
Approx. 136.0 degrees C
Short to ground (GND)
1) If a temperature is displayed which deviates greatly from the ambient temperature of the sensor, check sensor wiring for transfer resistance.
If the specification is obtained:
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Start engine and run at idle speed. The temperature value must increase uniformly
NOTE: 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.
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Press the -> button.
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Press buttons -0- and -6- for function "End output" and confirm entry with the -Q- button.
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Switch off ignition.
If the display does not indicate as described:
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Replace Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) sensor -G2-, item 14.
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Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
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Read readiness code. If the DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from battery
positive (B+), the readiness code must be generated again.
See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Continuation of check when display reads approx. -42.0 degrees C:
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Pull 4-pin connector -arrow-off Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) sensor -G2-.
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Jumper connector terminals 3 and 4 using adapter cables from VAG 1594 and observe display.
If display jumps to approx. 136.0 degrees C:
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Press the -> button.
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Press buttons -0- and -6- for function "End output" and confirm entry with the -Q- button.
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Switch off ignition.
-
Replace Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) sensor -G2-, item 14.
-
Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes