Jetta GLX V6-2.8L (AFP) (2002)
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Check wires between test box and 4-pin connector for open circuit according to wiring diagram.
Terminal 3 + socket 93
Terminal 4 + socket 108
Wire resistance: max: 1.5 Ohm
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinite Ohm
If no malfunctions are found in wires:
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Measure resistance at Engine Coolant Temperature (ECT) Sensor - G62-, terminals C (signal) and D (Ground -GND-).
Range A displays resistance values for the temperature range of 0 to 50 degree C, range B displays resistance values for the temperature range of 50 to
100 degree C.
Read-out examples:
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30 degree C is in range A and corresponds to a resistance of 1.5 to 2.0 kOhms
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80 degree C is in range B and corresponds to a resistance of 275 to 375 Ohm
If specified value is not obtained:
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Replace Engine Coolant Temperature (ECT) Sensor -G62- with Engine Coolant Temperature (ECT) Sensor -G2-:
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Vehicles with engine code AFP, item 23 ,
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Vehicles with engine code BDF, item 14 .
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan
Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data