Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
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Check ECT sensor resistance across terminal 1 (signal) and terminal 3 (Ground).
The graph is divided into two temperature ranges:
Range A: 0-50°C (32-122°F)
Range B: 50-105°C (122-221°F)
Examples:
30°C (86°F) is in range A and corresponds to a resistance of 1.5-2.0 k Ohms
80°C (176°F) is in range Band corresponds to a resistance of 275- 375 Ohms
If resistance is NOT OK:
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Replace Engine Coolant Temperature (ECT) sensor -G62-.
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If the wiring is OK and the resistance measurement values are OK.:
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Replace Motronic ECM -J220-. See: Computers and Control Systems/Engine Control Module/Service and Repair
With Generic Scan Tool
Engine Coolant Temperature (ECT) sensor, checking
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 Connector test set
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Wiring diagram
Test requirements