ENGINE (J05E)/TROUBLESHOOTING
2–638
P0629: Suction control valve for fuel supply pump - circuit (Circuit high)
INFORMATION
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. PoB short.
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 1,900 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.
•
Cruise control function is not available.
•
Idling stop system is not available.
•
PTO is not available.
•
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.
•
Cruise control does not work.
•
Idling stop system does not work.
•
PTO cannot be used.
•
DPR cannot be regenerated.
<Symptoms on the vehicle due to malfunction>
•
–
6.
Pre-inspection work
•
Check that the battery voltage is in the normal range.
XZD (PCV-)
%X0
$XZ
XZC
(SCV+)
(SCV-)
(PV-S)
(PV+S)
(PCV+)
EBS
EBT
1.5A
1.5A
Suction control valve
Engine ECU
SHTS021270300581