Dtc: P244B: Incomplete Regeneration - Hino 238 Workshop Manual

DTC: P244B
P244B: Incomplete regeneration
INFORMATION
PTO
accelerator sensor
1. Technical description
• The ECU always calculates and integrates the soot discharge quantity from the engine.
• The ECU decides the DPR regeneration mode based on the soot accumulation quantity.
• The soot accumulation quantity has exceeded the allowable regeneration quantity.
• DPR regeneration failure is detected on the basis of the values obtained from the exhaust gas pressure sensor (dif-
ferential pressure sensor) and the DPR temperature sensor.
<Description of malfunction>
–
•
2. DTC set condition
(1) DTC detection condition
• The engine must not be stopped.
• After automatic regeneration
• Burner in inactive status
• Calculated exhaust gas flow rate of 205 L/s or higher
• Exhaust brake is inactive.
ENGINE CONTROL SYSTEM (J08E)
KSE
KSF
KSJ
KSK
KSL
Engine
ECU
Exhaust gas Exhaust gas
temperature temperature
sensor sensor
(DOC outlet) (DOC inlet)
LCY
(TEX1)
LCZ
(GND1)
Differential
pressure
sensor
(VCC)
(VOUT)
(GND)
4–1161
EN01H16F01030F03001146
(TEX3)
(GND3)
SAPH16F010300899