Jetta Sedan V6-2.8L (BDF) (2003)
If indication remains at approx. -40 degree C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Continuation of test if indication is approx. 140 degree C:
Vehicles with engine code AFP
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Disconnect 4-pin connector from Engine Coolant Temperature (ECT) Sensor -G62- with Engine Coolant Temperature (ECT) Sensor -G2- (arrow)
Vehicles with engine code BDF
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Disconnect 4-pin connector from Engine Coolant Temperature (ECT) Sensor -G62- with Engine Coolant Temperature (ECT) Sensor -G2- (arrow)
Continuation for all vehicles
If indication jumps to approx. -40 degree C:
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End diagnosis and switch ignition off.
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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
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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 degree C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Checking wiring
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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/With Generic Scan Tool/Test Box, Connecting For Wiring Test