SWITCH GP-KEY 3E9161 - Caterpillar

Conditions Which Generate This Code:The electrically erasable programmable read only memory (EEPROM) in the electronic control module (ECM) may be faulty. The EEPROM remembers the programmable parameters when electrical power is not applied to the ECM.System Response:The diagnostic code may be viewed on the Digital Diagnostic Tool (DDT), on the Engine Control Module (ECM), or on the Caterpillar Electronic Technician (Cat ET).The engine speed governing and air/fuel ratio control are inoperative.The following conditions may activate this fault code even though the EEPROM is working properly:
A new ECM is installed.
A new personality module is installed and changes have been made to the programmable parameters.If either of these conditions apply, the problem may be resolved by successfully performing all of the following procedures:Note: The ECM must be replaced if any of these steps cannot be performed successfully.Test Step 1. Program the ECM
Program all of the values for the programmable parameters into the ECM. Refer to Troubleshooting, "Replacing the ECM".Expected Result:The values are successfully programmed into the ECM.Results:
OK - The values for the programmable parameters were successfully programmed into the ECM. Proceed to Test Step 2.
Not OK - The values for the programmable parameters were not successfully programmed into the ECM.Repair: Replace the ECM. Refer to Troubleshooting, "Replacing the ECM".STOPTest Step 2. Calibrate the Oxygen Sensor
Calibrate the oxygen sensor. Refer to Troubleshooting, "Oxygen Sensor - Calibrate".Expected Result:The oxygen sensor was successfully calibrated.Results:
OK - The oxygen sensor was successfully calibrated. Proceed to Test Step 3.
Not OK - The oxygen sensor was not successfully calibrated.Repair: Refer to Troubleshooting, "Oxygen Sensor Signal".STOPTest Step 3. Calibrate the Fuel Actuator
Remove electrical power to the engine.
Restore electrical power to the engine. When power is restored, the control module will automatically perform a calibration of the fuel actuator. Look for these diagnostic codes:
576-02 Heinzmann Actuator not controlling position
577-11 Heinzmann Actuator Calculated Gain out of range
578-11 Heinzmann Actuator Calculated Offset out of rangeExpected Result:When the power was restored, the control module automatically performed a calibration of the fuel actuator. There were no diagnostic codes for the actuator.Results:
OK - When electrical power was restored, the control module automatically performed a calibration of the fuel actuator. There were no diagnostic codes for the actuator.Repair: Clear all of the diagnostic codes. If the 591-12 diagnostic code does not return, the problem is resolved. Resume normal operation.STOP
Not OK - When electrical power was restored, the control module automatically performed a calibration of the fuel actuator. There was at least one diagnostic code for the actuator.Repair: Refer to Troubleshooting, "Fuel Actuator".STOP