Zenith NA665, Operator'S Manual

Page: 31 / 64

28 Rev-13 Nov 23, 2020
DTC List (continued)
DTC Fault Description
MIL
Flash
Code
528 Pre-Throttle sensor is out of range low, possible short to ground 528
529 Pre-Throttle sensor is out of range high, possible short to power 529
531 +12V or +24V System voltage too low 531
541 +12V or +24V System voltage too high 541
551 +5V Sensor reference voltage XDRP too low 551
561 +5V Sensor reference voltage XDRP too high 561
571 Engine speed has exceeded the third level (3 of 3) of overspeed protection 571
572
Engine speed has exceeded the second level (2 of 3) of overspeed
protection
572
573 Engine speed has exceeded first level (1 of 3) of overspeed protection 573
581
Fuel valve sensor voltage out of range low, normally set if signal has
shorted to ground, circuit has opened or sensor has failed
581
582
Fuel valve sensor voltage out of range high, normally set if signal has
shorted to power or ground for the sensor has opened
582
583
LSeries Fuel Trim Valve Fault, the LSeries monitors its control functions
internal to itself, a fault can occur if the actuator doesn't maintain position
set point, the position sensor fails, the temperature sensor fails, or over
temperature
583
612
Intergal term on the boost control PID is at it's upper limit for a specified
amount of time and the desired boost pressure set point has not been
reached
612
613
Intergal term on the boost control PID is at it's lower limit for a specified
amount of time and the desired boost pressure set point has not been
reached
613
631
FSeries or LSeries Throttle Valve Fault, the smart throttle monitors its
control functions internal to itself, a fault can occur if the actuator doesn't
maintain position set point, the position sensor fails, the temperature
sensor fails, or over temperature
631
641
EGT Sensor Voltage is High, normally set if the pessure signal wire has
become shorted to power or the SECM input circuit has failed
641
642
EGT Sensor Voltage is Low, normally set if the signal wire has become
disconnected or shorted to ground or the input circuit to the SECM is
open
642
644
Exhaust Gas Temperature (EGT) has reached the maximum allowable
limit for a specified period of time
644
651
Intergal term in the EGR valve control PID reached it's upper limit for a
specified amount of time and the desired EGR dP flow set point has not
been reached
651
652
Intergal term on the EGR valve control PID is at it's lower limit for a
specified amount of time and the desired EGR dP flow set point has not
been reached
652
653
EGR dP Sensor Voltage is High, normally set if the pressure signal wire
has become shorted to power or the SECM input circuit has failed
653