TURBOCHARGER GP 2785301 - Caterpillar

Illustration 1 g00934117
Schematic of the strain sensor (longitudinal stability) (LSI) This diagnostic code is associated with the strain sensor (longitudinal stability) (LSI). The FMI 02 means that the ECM has determined that the data is erratic, intermittent, or incorrect. The strain sensor is a PWM sensor that operates at a frequency of approximately 500 hertz. The sensor has an operating duty cycle of 5% to 95%. The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent connections or poor connections
Mechanical devices are loose.
The ECM has failed. This is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1826 FMI 02 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure. System Response:The diagnostic code of CID 1826 FMI 02 will be logged in the internal memory of the ECM.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a 7X-1710 Multimeter Probe along contact 1 (wire T800-OR) for the voltage supply.
Turn the key start switch and the disconnect