LeeBoy 8520C - Page 154

SPN FMI DTC SYMPTOM/CAUSE RECOVERY FROM ERROR
523537 2
EGR DC motor tempera-
ture error.
Estimated temperature is 113° F (45°
C) or above. EGR stops.
Diagnostic counter = zero
523538 2 QR data error.
QR data read error from EEPROM.
Nozzle correction is not executed.
Key switch turn OFF.
523539 2 Pump seizing 1.
Rail pressure of 230 MPa (33400 psi
or 2350 kgf/cm
2
) or more continues
one second under the condition of
above 800 min-1 (rpm).
Under 800 min-1 (rpm) condition, rail
pressure of 220 MPa (31900 psi or
2250 kgf/cm
2
) or more continues one
second under the condition of below
800 min-1 (rpm). [Threshold changes
depending upon the engine speed.
700 min-1 (rpm) should be used as a
reference.
Key switch turn OFF to minimize PM
emission to DPF and avoid extremely
high pressure in injection system.
523540 2 Pump seizing 2.
Rail pressure of 197MPa (28600 psi or
2010 kgf/cm
2
) or more continues one
second under the condition of above
800 min-1 (rpm).
Under 800 min-1 (rpm) condition, rail
pressure of 220 MPa (31900 psi or
2250 kgf/cm
2
) or more continues one
second under the condition of below
800 min-1 (rpm). [Threshold changes
depending upon the engine speed.
700 min-1 (rpm) should be used as a
reference.
Key switch turn OFF.
523541 3 EGR lift sensor: High
+B short circuit of sensor/harness.
Failure of sensor. Voltage of ECR lift
sensor is 4.5V or above. EGR stops.
Key switch turn OFF.
523541 4 EGR lift sensor: Low
Open circuit or short circuit of sensor/
harness. Failure of sensor. Voltage of
ECR lift sensor is 0.3V or less. EGR
stops.
Key switch turn OFF.
523543 2
Accelerator position
sensor error (CAN).
Accelerator position sensor signal
error (sensor/harness open circuit,
ground short circuit, etc.).
Diagnostic counter = zero.
CAN signal recovers.
523544 3
+B short of air heater
relay driving circuit.
+B short circuit of harness. Faulty
starting. White smoke increases.
Key switch turn OFF.
523544 4
Ground short of air heater
relay driving circuit.
Ground short or open circuit of
harness.
Key switch turn OFF.
523547 2 CAN2 bus off. CAN2 bus off. Key switch turn OFF.
523548 2 CAN-KBT frame error. CAN-KBT frame open circuit error. Key switch turn OFF.
523572 4
EGR position sensor
failure.
EGR position sensor error signal
received via CAN. EGR stops.
Key switch turn OFF.
523574 3 EGR actuator open circuit.
EGR actuator open error signal
received via CAN. EGR stops.
Key switch turn OFF.
523575 7 EGR actuator valve stuck.
EGR actuator valve stuck error
received via CAN. EGR stops.
Key switch turn OFF.
5-62 LeeBoy 8520C Conveyor Paver
Maintenance