Passat Sedan V6-2771cc 2.8L DOHC (AHA) (1998)
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Check IAT sensor resistance across terminal 1 (signal) and terminal 2 (Ground).
The graph is divided into two temperature ranges:
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Range A: 0-50 °C (32-122 °F)
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Range B: 50-105 °C (122-221 °F)
Examples:
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30 °C (86 °F) is in range A and corresponds to a resistance of 1.5-2.0 k Ohms
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80 °C (176 °F) is in range B and corresponds to a resistance of 275-375 Ohms
If resistance is NOT OK:
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Replace Intake Air Temperature (IAT) sensor - G42-.
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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: 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: Engine Control Module/Service and Repair
With Generic Scan Tool
Intake Air Temperature (IAT) 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
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Chilling spray (commercially available)
Test requirements