P06D3: Air Flow Sensor Power Supply Failure Short To Gnd; Dtc: P06D3 And P06D4 - Hino Motors HINO 155 series Workshop Manual

DTC: P06D3 and P06D4

P06D3: Air flow sensor power supply failure Short to GND

INFORMATION
Body earth
1. Technical description
• The air flow sensor installed to the air cleaner consistently measures an intake air volume.
• The engine ECU supplies power to the air flow sensor.
<Description of malfunction>
• Excessively low voltage has been detected in the air flow sensor power supply.
2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• Battery voltage is in the range of 10 V to 16 V.
The conditions described above remain for 5 seconds or longer.
(2) Judgement criteria
Voltage of the air flow sensor power supply circuit remains at 5.6 V or lower for 1 sec.
3. Reset condition
• Normal operation instantly restored once values deviate from judgment criteria.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: OFF
• 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.
7. After-inspection work
• Clear all past DTCs.
• Check that no DTC is detected after test drive.
ENGINE (J05E)/TROUBLESHOOTING
Coolant temperature
sensor
X66 (THW)
Z5G (E)
X71
(FC)
XCV
(E2G)
XCT
(+B)
Z65
(E2)
X72
(THA)
Intake air temperature sensor
(built in the air flow sensor)
Engine ECU
10mA
X28 (THW)
10mA
ZJQ (E5)
10mA X4K
(VG)
200mA XMH
(EVG)
X2U
200mA
(VAF)
10mA
X82
10mA
(THA)
2–707
EN01H02127030602016116
SHTS021270300646