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31– 112 31 Heater Core Sensor (for Automatic A/C) Inspection 1. Check the heater core sensor. a. Using the ohm band of digital multimeter, measure the resistance of heater core sensor according to the Standard Resistance - + RT21310990 1 2 Multimeter Connection Temperature (°C) Lower Limit (KΩ) Standard Value (mm) Upper Limit (KΩ) Temperature (°C) Lower Limit (KΩ) Standard Value (mm) Upper Limit (KΩ) Terminal 1 - 36°C 1.388 1.453 1.520 69°C 0.451 0.483 0.516 Terminal 1 - 37°C 1.337 1.400 1.467 70°C 0.437 0.468 0.501 Terminal 1 - 38°C 1.289 1.351 1.415 71°C 0.424 0.454 0.486 Terminal 1 - 39°C 1.242 1.303 1.366 72°C 0.411 0.441 0.472 Terminal 1 - 40°C 1.198 1.258 1.319 73°C 0.398 0.428 0.458 Terminal 1 - 41°C 1.156 1.213 1.274 74°C 0.386 0.415 0.445 Terminal 1 - 42°C 1.114 1.172 1.230 75°C 0.378 0.398 0.418 Terminal 1 - 43°C 1.075 1.131 1.189 76°C 0.364 0.390 0.420 Terminal 1 - 44°C 1.037 1.091 1.148 77°C 0.353 0.379 0.408 Terminal 1 - 45°C 1.001 1.056 1.110 78°C 0.343 0.368 0.397 Terminal 1 - 46°C 0.966 1.018 1.073 79°C 0.333 0.358 0.385 Terminal 1 - 47°C 0.933 0.984 1.038 80°C 0.323 0.348 0.375 Terminal 1 - 48°C 0.900 0.950 1.004 81°C 0.314 0.337 0.364 Terminal 1 - 49°C 0.870 0.919 0.970 82°C 0.305 0.328 0.354 |