TUBE ASSEM. 6K7938 - Caterpillar

The Electronic Control Module (ECM) detects all of the following conditions:
The ECM has been powered for at least 3 seconds.
The signal voltage for the throttle position is below the diagnostic lower limit that is set for the application.
The power supply for the throttle sensor is within the expected range.System Response:If equipped, the warning light will come on. The ECM logs the diagnostic code if the engine is running. The diagnostic codes can be viewed on the electronic service tool. The ECM will return the engine to low idle.Possible Performance Effect:Throttle 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:Monitor the configuration screen on the electronic service tool in order to determine the type of throttle position sensor that is used on the engine.If the engine is equipped with an analog throttle position sensor, proceed to “Test Step 1”.If the engine is equipped with a digital throttle position sensor, proceed to “Test Step 2”.Test Step 1. Perform the following diagnostic procedure: "Analog Throttle Position Sensor Circuit - Test"Results:
OK - STOPTest Step 2. Perform the following diagnostic procedure: "Digital Throttle Position Sensor Circuit - Test"Results:
OK - STOP