Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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Disconnect 2-pin connector from Engine Coolant Temperature (ECT) Sensor -G62- (arrow).
If indication jumps to approx. -40 degrees C:
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End diagnostic and switch ignition off.
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Remove intake air hose between Mass Air Flow (MAF) sensor and throttle valve control module, item 1 .
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Replace Engine Coolant Temperature (ECT) Sensor -G62-.
WARNING:
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Cooling system is under pressure.
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Danger of scalding when opening!
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Erase DTC memory of Engine Control Module (ECM), 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 degrees C:
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End diagnostic 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
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Check wires between test box and 2-pin connector for open circuit according to wiring diagram.
Terminal 1 + socket 93
Terminal 2 + socket 108
Wire resistance: max. 1.5 Ohms
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: Infinity Ohms
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Erase DTC memory of Engine Control Module (ECM), 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 no malfunctions are found in wires:
