Inspect For Short-Circuit In Wire Harness Or Air Flow Sensor - Hino Motors HINO 155 series Workshop Manual

2–712
3
Inspect the air flow sensor
Was any failure found?
Clean the sensing unit and install it properly.
If damaged, replace the air flow sensor.
Perform "After-inspection work" of INFOR-
MATION section.
4

Inspect for short-circuit in wire harness or air flow sensor

C D
E12
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 air flow sensor.
YES
1. Set the starter key to the "LOCK" position.
E74
2. Connect the signal check harness to the engine ECU vehicle side
harness. (Do not connect the harness to the ECU.)
E78
3. Disconnect the air flow sensor connector.
4. Use the electrical tester to measure the resistance between the
terminals of engine ECU (signal check harness) and ground.
SHTS021270300649
Starter key: LOCK
YES
Go to step 4.
Measurement Tester
conditions connections
Engine ECU
(the signal check
harness)
VG (E74) – Ground
EVG (E78)–
Ground
VAF (E12)–
Ground
Repair or replace the harness.
Perform "After-inspection work" of INFOR-
MATION section.
NO
Standard values
 
NO