P0643: Ecu Sensor Power Supply 1 Failure (Out Of Range High); Dtc: P0643 - Hino Motors HINO 155 series Workshop Manual

2–658

DTC: P0643

P0643: ECU sensor power supply 1 failure (Out of range high)

INFORMATION
(E1)
(PCR1)
(VC1)
Common rail
(E2)
pressure sensor
(PCR2)
(VC2)
(VC)
Boost pressure
(PIM)
sensor
(E)
(G-)
Engine speed sub
(G1)
sensor
(VG)
(E2R)
(VCR)
Diesel throttle (E2)
(VTA2)
(VC)
(VTA)
1. Technical description
• Power is supplied to the sensor power supply 1 circuit.
(Boost pressure sensor, diesel throttle position sensor 1, diesel throttle position sensor 2, common rail pressure
sensor (main), accelerator sensor 2, engine speed sub sensor)
<Description of malfunction>
• High voltage failure of sensor power supply circuit is detected.
2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• Battery voltage is in the range of 10 V to 16 V.
Above conditions continue for at least 5 seconds.
(2) Judgement criteria
• The AC/DC converter input sensor has a power supply voltage no greater than 4.5 V for at least 3 seconds.
3. Reset condition
• Immediately after normal operation is restored.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: OFF
• SVS light: OFF
ENGINE (J05E)/TROUBLESHOOTING
$XV
EBK 15mA Z70
2mA
EBJ XZG
15mA
EBH X85
EBN 15mA Z72
2mA
EBM XZH
15mA XG2
EBL
$XW (PC2S)
15mA
J0M
5mA X0G (PIM)
J0L
15mA
Z6R ZJP (E4)
15mA
X4Z (G-)
N44
5mA XZA (G+)
N43
15mA
N45 EB5 (VCG)
XFD TYP 0.2A
XQT (M-)
XFC TYP 1A XQS
Z6P
TYP 1A ZD6
XSR TYP 0.2A X3V
X0N TYP 0.2A XG2
X3U TYP 0.2A XK3
Engine ECU
XQ4
(PC1S) (VPA)
YKE
(EPA)
(E1)
YKF
(PCR1) (VCPA)
XZL
(VC)
(VPA2)
YWJ
(E2) (EPA2)
YWH
(PCR2) (VCP2)
(VC2)
(M+)
(E3)
(VTA2)
(VC2)
(VTA1)
EN01H02127030602016108
5mA
JE5
(VPA1)
20mA
Z65
(E1)
20mA
JE3
(VCP1)
Accelerator
5mA
ZSQ
(VPA2)
sensor
20mA
Z6T
(E2)
20mA
JE4
(VCP2)
SHTS021270300601