24615-ZV4-020 Honda LINK A, SHIFT (Honda Code 3174521).

Default Settings for the Cat Monitoring System
Derate - Derate is a reduction of engine horsepower in response to an abnormal operating condition.Setpoint - The setpoint is a specific value which can activate the following responses: warning, deration and shutdown. The setpoint can be a pressure, a speed, a temperature, or a voltage.Hysteresis - Hysteresis is the change in the signal from a sensor that is tolerated by the ECM. Hysteresis is the difference between the setpoint that activates a response and the value that deactivates the response. For example, a warning for low voltage can activate if a value below 20 V is detected by the ECM. The voltage must rise to 22 V in order to clear the warning. The hysteresis is the 2 V that are above the 20 V.Voltage
The ECM automatically warns the operator of low system voltage. The default settings that are programmed at the factory are listed in Table 1.
Table 1
Voltage Monitoring    
Parameter     Default Setting    
Warning setpoint     20 V    
Warning delay     10 seconds    
Hysteresis     2 V    
Security level     No required password    If the voltage is below 20 V for 10 seconds, a warning will occur. To deactivate the warning, the voltage must rise above 22 V.The setpoint can be programmed to a value between 20 and 22 V.Engine Oil Pressure
The ECM automatically performs the following functions for low engine oil pressure:
Warning
ShutdownThe strategy is based on a map of the engine oil pressure versus the engine rpm. See Illustration 1. The default settings that are programmed at the factory are listed in Table 2.
Table 2
Engine Oil Pressure    
Parameter     Default Settings    
Hysteresis     Map    
Activation delay     10 seconds    
Security level     Required password    
Warning setpoint     Map    
Warning delay     2 seconds    
Shutdown setpoint     Map    
Shutdown delay     9 seconds    
Illustration 1 g00768888
Map of the engine oil pressure versus the engine rpm (Y) Engine oil pressure in kPa (X) Engine rpm (1) Hysteresis (2) Minimum engine oil pressureIf the engine oil pressure is below the minimum pressure for 4 seconds, a warning will occur. To deactivate the warning, the engine oil pressure must rise above the hysteresis that is set in the map.If the engine oil pressure is below the minimum pressure for 9 seconds, a shutdown will occur.The map cannot be reprogrammed.High Coolant Temperature
The ECM will automatically perform the following functions for high coolant temperature:
Warning
Derating
ShutdownThe default settings that are programmed at the factory are listed in Table 3.
Table 3
High Coolant Temperature    
Parameter     Default Setting    
Warning setpoint    
102 °C (216 °F)    
Warning delay     5 seconds    
Derate setpoint    
105° C (221° F)    
Derate delay     5 seconds    
Maximum time of derating     480 seconds    
Hysteresis    
5 °C (9 °F)    
Security level     No required password    
Maximum derating     25%    
Shutdown setpoint    
107 °C (225 °F)    
Shutdown delay     10 seconds    If the coolant temperature is above 102 °C (216 °F) for 5 seconds, a warning will occur. The coolant temperature must be below 97 °C (207 °F) in order to deactivate the warning.If the coolant temperature is above 105° C (221° F) for 5 seconds, a derating will occur. A continuous 25 percent derating is reached in 480 seconds. When the coolant temperature is less than 102 &de