P05F1: Crankcase Ventilation System; Dtc: P05F1 - Hino Motors HINO 155 series Workshop Manual

DTC: P05F1

P05F1: Crankcase ventilation system - disconnection between the CV valve and the intake
manifold
INFORMATION
Body earth
1. Technical description
• The closed breather circuit is malfunctioning and the air flow sensor detects trouble when air enters through the
malfunctioning part.
<Description of malfunction>
• Closed breather malfunction is detected.
2. DTC set condition
(1) DTC detection condition
• The engine speed is in the range of 720 to 960 r/min.
• A change in the engine speed is 234.4 r/min/sec or less.
• The fuel injection quantity is in the range of 0 mm
• A change in fuel injection quantity is 78.1 mm
• Engine coolant temperature is 55 C {131 F} or less.
• A target EGR valve opening is 0% or less.
• Exhaust brake not actuated
(2) Judgement criteria
• Theoretical air quantity calculated from boost pressure and atmospheric pressure and actual air quantity are
compared for at least 10 seconds, and the ratio of theoretical air quantity to actual air quantity is at least 1.12.
And:
• Difference between DCY value prior to above result and current DCY value is 0.10 or less; and
• When prior DCY the starter key is turned "LOCK" and engine is stopped, (boost pressure - atmospheric pres-
sure) ≥ 18 kPa, and that condition did not continue for 3 seconds or more.
3. Reset condition
• After normal operation is restored
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
ENGINE (J05E)/TROUBLESHOOTING
Coolant temperature
sensor
(THW)
X66
Z5G (E)
X71
(FC)
XCV
(E2G)
XCT
(+B)
Z65
(E2)
X72
(THA)
Intake air temperature sensor
(built in the air flow sensor)
10mA X28 (THW)
10mA
ZJQ (E5)
10mA X4K
(VG)
200mA XMH
(EVG)
X2U
200mA
(VAF)
10mA
X82
10mA
(THA)
3 3
/st. cyl to 80 mm /st. cyl.
3
/st. cyl/sec or less.
EN01H02127030602016097
Engine ECU
SHTS021270300562
2–613