EDGE AS 2731430 - Caterpillar

The Electronic Control Module (ECM) has detected an invalid combination of positions for the multi-position switches.If the engine is equipped with an analog throttle position sensor then the signal from the idle validation switch is invalid.System Response:The ECM will log the diagnostic code. The diagnostic code may be viewed on the electronic service tool.Possible Performance Effect:The engine speed defaults to low idle or a predetermined safe speed. The engine will remain at this speed while the diagnostic code remains active.The reduction of speed is determined by the current speed of the engine. When a fault is detected and the engine is above the predetermined safe speed, the engine will reduce speed to the safe speed.When a fault is detected and the engine is below the predetermined safe speed, the engine speed will remain unchanged.All throttle switch inputs are ignored by the ECM until the fault is repaired or until the keyswitch has been turned to the OFF position and then back to the ON position.The engine will default to the limp home mode.If a second throttle is installed, the engine will use the second throttle until the fault is repaired.Troubleshooting:Proceed to “Test Step 1” if the engine is equipped with a throttle switch.Proceed to “Test Step 2” if the engine is equipped with an analog throttle position sensor.Test Step 1. Perform the following diagnostic procedure: "Throttle Switch Circuit - Test"Results:
OK - STOPTest Step 2. Perform the following diagnostic procedure: "Analog Throttle Position Sensor Circuit - Test"Results:
OK - STOP