Dtc: P0122 And P0123; P0122: Intake Throttle Valve Position Sensor 1 - Out Of Range (Low) - Hino Motors HINO 155 series Workshop Manual

DTC: P0122 and P0123

P0122: Intake throttle valve position sensor 1 - out of range (Out of range low)
INFORMATION
Diesel throttle
1. Technical description
• The diesel throttle controls valves steplessly to control boost pressure and intake air volume.
• Inside the diesel throttle, a sensor designed to detect a travel of the valve consistently monitors a measurement
reading and an actual opening.
<Description of malfunction>
• Low voltage failure of diesel throttle (intake throttle valve) position sensor 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.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
(2) Judgement criteria
• Diesel throttle position sensor remains at 0.2 V (5 C {41 F}) or less for 3 seconds or longer.
3. Reset condition
• After restoration to normal condition
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• –
<Symptoms on the vehicle due to malfunction>
• –
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
ENGINE (J05E)/TROUBLESHOOTING
XFD TYP 0.2A
(E2R)
XFC TYP 1A
(VCR)
Z6P
TYP 1A
(E2)
XSR TYP 0.2A
(VTA2)
X0N TYP 0.2A
(VC)
X3U TYP 0.2A
(VTA)
Engine ECU
XQT (M-)
XQS
(M+)
ZD6
(E3)
X3V
(VTA2)
XG2
(VC2)
XK3
(VTA1)
2–267
EN01H02127030602016048
SHTS021270300247