Jetta L4-2.0L (BEV) (2004)
-
Disconnect 4-pin connector from Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) sensor -G2- (arrow).
If indication jumps to approx. -40.0 degrees C
-
End diagnosis and switch ignition off.
-
Replace Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) sensor -G2-.
WARNING:
-
The cooling system is under pressure.
-
Danger of scalding when opening.
-
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
-
Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes.
If indication remains at approx. 140.0 degrees C
-
End diagnosis and switch ignition off.
-
Check wires according to wiring diagram.
Checking wiring
-
Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
-
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 Ohms
-
Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: Ohms
If no malfunctions are found in wires: