87538-ZV1-C23 Honda SEE PART DETAILS - PRI; LABEL, WARNING OPERATOR (ENGLISH)

Always determine the cause of the engine shutdown. Make necessary repairs before attempting to restart the engine.
Be familiar with the following items:
Types and locations of shutoff
Conditions which cause each shutoff to function
The resetting procedure that is required to restart the engineAlarms
The alarms are electrically operated. The operations of the alarms are controlled by the ECM.The alarm is operated by a sensor or by a switch. When the sensor or the switch is activated, a signal is sent to the ECM. An event code is created by the ECM. The ECM will send a signal in order to illuminate the lamp.Your engine may be equipped with the following sensors or switches:Intake manifold air temperature - The intake manifold air temperature sensor indicates high intake air temperature.Intake manifold pressure - The intake manifold pressure sensor checks the rated pressure in the engine manifold. Fuel rail pressure - The fuel rail pressure sensor measures the high pressure or low pressure in the fuel rail. The ECM will Check the pressure.Engine oil pressure - The engine oil pressure sensor indicates when oil pressure drops below rated system pressure, at a set engine speed.Engine overspeed - If, the engine rpm exceeds the overspeed setting the alarm will be activated.Air filter restriction - The switch checks the air filter when the engine is operating.User-defined switch - This switch can shut down the engine remotely. There will be no alarm or warning lamp to show that the switch has been operated.Water in fuel switch - This switch checks for water in the primary fuel filter when the engine is operating.Fuel temperature - The fuel temperature sensor monitors the pressurized fuel in the high-pressure fuel pump.Coolant temperature - The coolant temperature sensor indicates high jacket water coolant temperature.Note: The sensing element of the coolant temperature sensor must be submerged in coolant in order to operate.Engines may be equipped with alarms in order to alert the operator when undesirable operating conditions occur.
When an alarm is activated, corrective measures must be taken before the situation becomes an emergency in order to avoid possible engine damage.
If corrective measures are not taken within a reasonable time, engine damage could result. The alarm will continue until the condition is corrected. The alarm may need to be reset.Aftertreatment System
Temperature Sensor before DOC
Two NOx Sensors
Two SCR Temperature Sensors
Ammonia SensorTemperature Sensor before DOC - This sensor monitors the gas temperature that is entering the DOCNOx Sensor - Two NOx sensors monitor the NOx concentration within the exhaust gas. One sensor before the DOC and one after the SCR module. SCR Temperature Sensors - The sensor monitors the gas temperature entering the SCR. Also, a second temperature sensor is located down stream of the SCR. This sensor checks the temperature of the gas that is leaving the SCR.Ammonia Sensor - The sensor monitors the concentration of ammonia within the exhaust system after the CEM.Quality Sensor - The quality sensor provides the ECM with confirmation that the correct concentration of DEF is present in the tank. If the tank is filled with a different fluid which is not DEF, such as water or fuel the sensor will detect this change in quality and raise a fault. This fault will lead to an inducement and engine derate.The temperature sensor before DOC, NOx sensor, SCR temperature sensors, and ammonia sensor all connect with the engine ECM. If the signal from these sensors is out of the set range, the ECM will trigger an alarm for the operator. Diesel Exhaust Fluid (DEF) System Control
DEF Level Sensor - The DEF level sensor signals the ECM. The ECM determines the signal in order to give a level reading of the volume of fluid in the tank.DEF Temperature Sensor - The sensor signals the ECM. The ECM will determine the temperature of the DEF within the tank from the signals sent. The temperature of the DEF is important in order to keep the DEF injector operation correctly.Dosing Control Unit (DCU) - The DCU controls the injection of the DEF and will signal the ECM if the injection has been interrupted.The DEF level sensor, DEF temperature sensor, and the Dosing control unit all connect with the engine ECM. If the ECM determines that any of the signals are out of the specified range, an alarm will be triggered.Testing
Turning the keyswitch to the ON position will check the indicator lights on the control panel. All the indicator lights will be illuminated for 2 seconds after the keyswitch is operated. Replace suspect bulbs immediately.Refer to Troubleshooting for more information.