P0628: Suction Control Valve For Fuel Supply Pump - Circuit; Dtc: P0628 And P0629 - Hino Motors HINO 155 series Workshop Manual

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DTC: P0628 and P0629

P0628: Suction control valve for fuel supply pump - circuit (Circuit low)
INFORMATION
Suction control valve
1. Technical description
• The supply pump controls a fuel delivery rate to control common rail pressure.
<Description of malfunction>
• Abnormal voltage of supply pump magnetic valve (suction control valve) is detected. Possible disconnection or
GND short-circuit.
2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• Battery voltage is in the range of 10 V to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
• The injectors and injector driver circuits have started running.
(2) Judgement criteria
• SCV (suction control valve) drive current remains less than 500 mA for 2.1 seconds.
3. Reset condition
• After restoration to normal condition and starter key "OFF"
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
• Engine output is restricted.
• DPR regeneration stop.
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.
• DPR can not be regenerated.
<Symptoms on the vehicle due to malfunction>
• –
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
ENGINE (J05E)/TROUBLESHOOTING
1.5A
EBS
(SCV+)
1.5A
EBT
(SCV-)
EN01H02127030602016104
Engine ECU
XZC
(PCV+)
%X0
(PV+S)
$XZ
(PV-S)
XZD (PCV-)
SHTS021270300580