Measuring Inlet Manifold Temperature
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| Tools Needed | Qty | |
| 4C-6500 Digital Thermometer | 1 | |
The Electronic Control Module (ECM) uses the inlet manifold air temperature to help calculate the density of the air/fuel mixture.
Use the Caterpillar Electronic Technician (ET) to monitor the inlet manifold air temperature. The temperature can be verified with the 4C-6500 Digital Thermometer.
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| Illustration 1 | g06319944 |
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G3500H (1) Intake manifold test port | |
To measure the inlet manifold air temperature, use the 4C-6500 Digital Thermometer. Remove one of the plugs from the air inlet manifold. Insert a temperature probe in place of the plug. Measure the temperature when the engine is operating at full load.
If the inlet manifold air temperature is too high, inspect the thermostatic valve and the separate circuit's cooling system.
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