ENGINE (J05E)/TROUBLESHOOTING 2–709
P06D4: Air flow sensor power supply failure (High)
INFORMATION
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
• Key is ON and starter is OFF.
• 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 air flow sensor power supply circuit ≥ 20 V for 1 second.
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.
(FC)
(VG)
(EVG)
(VAF)
(THA)
X4K
XMH
X2U
X82
10mA
200mA
200mA
10mA
10mA
X71
XCV
XCT
X72
Z65
(E2G)
(+B)
(E2)
(THA)
Intake air temperature sensor
(built in the air flow sensor)
(E)
(THW)
Z5G
X66
ZJQ
(E5)
X28
(THW)
10mA
10mA
Engine ECU
Coolant temperature
sensor
Body earth
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