Here are a couple of charts. The charts show the resistance value for each sensor output for a given temperature. The CTS (Coolant Temperature Sensor) is odd because it has two outputs. One output is read by the ECM (Electronic Control Module) and the other is used by the Temperature Gauge. Just because one of the CTS outputs is reading correctly doesn't mean the other is also. For instance, the temperature gauge may show good operating temperatures yet the ECM sees something else. The sensors can all be checked at room temperature but a correct reading at this temperature does not mean the sensor reads correctly at other temperatures. The sensors can be checked with a good ohm meter but the outputs should be checked at several temperatures. The CTS can be checked in ice water and then heat the water and check temps. You will need a good thermometer for reference. The ATS can be checked in the fridge, room temp and with a hair dryer. The EGT can be checked with a heat gun.
The first chart shows the ATS (Air Temperature Sensor) and CTS. Note: The CTS has two readings for each temperature due to the dual output of the sensor.
The second chart is for the EGT (Exhaust Gas Temperature) sensor.
Mach Z 1000 SDI Sensor resistance
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