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Auxiliary Equipment Sensor Input Number 3 (OEM Switch) – Root Cause Not Known
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 1639 PID: S051 SPN: 703 FMI: 11 LAMP: None SRT: |
Auxiliary Equipment Sensor Input Number 3 (OEM Switch) – Root Cause Not Known. |
Possible engine power derate. |
 OEM Temperature/Pressure Sensor Circuit
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Circuit Description
The OEM has the option of wiring a temperature sensor input to the Cummins ECM. A specific calibration is then created to recognize this temperature sensor input. This fault code is activated when the temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. Depending on OEM requirements, an Engine Protection derate may be associated with this fault code.
Component Location
The OEM pressure or temperature sensor input will vary depending on application. Refer to the OEM troubleshooting manual for sensor location.
Shop Talk
This fault code is activated when the maximum inlet temperature or inlet pressure of a third party after-treatment system has exceeded the maximum allowable limits. A power derate may or may not be associated with this fault code.
Refer to Troubleshooting Fault Code t05-1639
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