Inspect The Air Flow Sensor; Inspect For Short-Circuits In Wire Harness Of Air Flow Sensor - Hino Motors HINO 155 series Workshop Manual

2–202
3

Inspect the air flow sensor

Was any failure found?
Clean the sensing unit and install it properly.
If dirt, clogging or damage was found,
replace the air flow sensor.
Perform "After-inspection work" of INFOR-
MATION section.
4

Inspect for short-circuits in wire harness of air flow sensor

C
E12
E74
Do the measurements meet the standard value?
Go to step 5.
ENGINE (J05E)/TROUBLESHOOTING
1. Check the installation of the air flow sensor.
2. Make sure there is no dirt, damage or clogging in the sensing unit
of the air flow sensor.
YES
1. Set the starter key to the "LOCK" position.
D
2. Disconnect the air flow sensor connector.
3. Connect the signal check harness to the engine ECU vehicle side
harness. (Do not connect harness to the ECU.)
E78
4. Use the electrical tester to measure the resistance between the
engine ECU (signal check harness) terminals and ground.
SHTS021270300185
Starter key: LOCK
YES
Go to step 4.
Measurement Tester
conditions connections
Engine ECU (sig-
nal check har-
ness)
VAF (E12) –
Ground
VG (E74) – Ground
EVG (E78) –
Ground
Repair or replace the harness.
Perform "After-inspection work" of INFOR-
MATION section.
NO
Standard values
 
NO