P0191: Fuel Rail Pressure Sensor (Main And Sub) - Out Of Range; Dtc: P0191 - Hino Motors HINO 155 series Workshop Manual

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DTC: P0191

P0191: Fuel rail pressure sensor (main and sub) - out of range

INFORMATION
1. Technical description
• The common rail pressure is controlled by the discharge of the supply pump.
• The supply pump discharge rate is adjusted by the SCV (suction control valve).
<Description of malfunction>
• Abnormally low fuel pressure inside common rail is detected.
2. DTC set condition
(1) DTC detection condition
• Engine speed ≥ 700 r/min.
• Fuel injection quantity ≥ 10 mm
• Fuel injection quantity fluctuation ≤ 2.6 mm
• Target current value of SCV ≤ 1,250 mA.
• No supply pump-related DTC is detected.
(2) Judgement criteria
• (Actual common rail pressure – target common rail pressure) ≤ -15 MPa for 15 seconds.
3. Reset condition
• After restoration to normal condition and starter key "LOCK"
4. Indication, warning or system control regulation when the DTC is set.
• MIL: OFF
• SVS light: OFF
• Engine output is restricted.
• Cruise control function is not available.
• Idling stop system is not available.
• Vehicle start control is not available.
ENGINE (J05E)/TROUBLESHOOTING
EBK
(E1)
EBJ
(PCR1)
EBH
(VC1)
Common rail
EBN
(E2)
pressure sensor
EBM
(PCR2)
EBL
(VC2)
3
/st. cyl.
$XV
(PC1S)
15mA Z70
(E1)
2mA
XZG
(PCR1)
15mA
X85
(VC)
15mA
Z72
(E2)
2mA
XZH
(PCR2)
15mA
XG2
(VC2)
$XW (PC2S)
3
/st. cyl. sec.
EN01H02127030602016053
Engine ECU
SHTS021270300285