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Reason:Engine Coolant Temperature – Data Valid But Above Normal Operational Range – Moderately Severe Level. Engine coolant temperature is above engine protection warning limit. Effect:Progressive power and/or speed derate increasing in severity from time of alert. If the Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamps starts flashing. Circuit Description:The coolant temperature sensor is a variable resistor sensor and is used to measure the temperature of the coolant of the engine. The engine control module (ECM) supplies 5 volts to the coolant temperature signal circuit. The ECM monitors the change...

Reason:Engine Coolant Temperature – Data Valid But Above Normal Operational Range – Moderately Severe Level. Engine coolant temperature is above engine protection warning limit. Effect:Progressive power and/or speed derate increasing in severity from time of alert. If the Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamps starts flashing. Circuit Description:The coolant temperature sensor is a variable resistor sensor and is used to measure the temperature of the coolant of the engine. The engine control module (ECM) supplies 5 volts to the coolant temperature signal circuit. The ECM monitors the change...

Reason:Accelerator Pedal or Lever Position 1 Sensor Circuit Frequency – Data Valid But Below Normal Operating Range – Most Severe Level. A frequency of less than 100 HZ has been detected at the frequency throttle input to the ECM. Effect:Engine will only idle. Circuit Description:This type of throttle interface is designed to accept a variable frequency signal as the throttle signal. An electronic component generates a square wave logic-level signal in which the frequency of the signal corresponds to a throttle command. The frequency values are established by the calibration in the engine control module (ECM). Component Location:Throttle location varies...

Reason:Accelerator Pedal or Lever Position Sensor 1 – Data Valid But Above Normal Operating Range – Most Severe Level. A frequency of more than 1500 Hz has been detected at the frequency throttle input to the ECM. Effect:Engine will only idle. Circuit Description:This type of throttle interface is designed to accept a variable frequency signal as the throttle signal. An electronic component generates a square wave logic-level signal in which the frequency of the signal corresponds to a throttle command. The frequency values are established by the calibration in the engine control module (ECM). Component Location:Throttle location varies with each...

Reason:SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the multiplexed accelerator pedal. Effect:Engine will only idle. Circuit Description:Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU...