Dtc: P22D3: Nozzle Stuck (Vnt Stick Failure) - Hino 238 Workshop Manual

DTC: P22D3
P22D3: Nozzle stuck (VNT stick failure)
INFORMATION
VNT actuator
(REA)
1. Technical description
• The VNT actuator steplessly operates the nozzle via the REA (Rotary Electric Actuator) and controls turbine speed
and boost pressure.
• The VNT actuator (REA) has a position sensor and constantly monitors the target opening and the actual opening.
• Wiping operation is carried out when the engine is stopped and the soot, oil, and other impurities accumulated in the
vane working range are removed. Also, the turbocharger mechanical working range is checked for trouble.
2. DTC set condition
(1) DTC detection condition
• While the engine is in operation: Always
• While the engine is stopped: During wiping operation
(2) Judgement criteria
Item
1. Stuck nozzle
(position control failure)
3. Reset condition
• After normal operation is restored and starter switch is turned OFF.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• Diag lamp: OFF
• Engine output is restricted.
• Cruise control function is not available.
• Auxiliary brake function is not available.
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• Engine output is insufficient.
• Cruise control does not work.
• Auxiliary brake does not work.
ENGINE CONTROL SYSTEM (J08E)
VNT controller
8 10
7 11
6 12
4 1
5
3 2
6
2 3
7
5 4
1 8
14
(VNTG)
When motor drive load is 95 % or more for 3 seconds continuously and restora-
tion operation fails 5 times.
FUSE
RELAY
Power
(VNTV)
CAN H
CAN L
Details (Reference)
4–1097
EN01H16F01030F03001141
BATTERY
Engine
ECU
SAPH16F010300843