Inspect The Air Flow Sensor Signal; Check The Dtc Detected (Engine Ecu) 2 - Hino Motors HINO 155 series Workshop Manual

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7

Inspect the air flow sensor signal

E74
D
Do the measurements meet the standard value?
Go to step 8.
8

Check the DTC detected (Engine ECU) 2

Has DTC P0104 been detected?
Replace the engine ECU.
Perform "After-inspection work" of INFOR-
MATION section.
ENGINE (J05E)/TROUBLESHOOTING
1. Set the starter key to the "LOCK" position.
E78
2. Connect the air flow sensor connector.
3. Start the engine.
4. Use the oscilloscope to measure the signal voltage between the
terminals in the engine ECU (signal check harness).
SHTS021270300195
YES
Perform engine warm up. (engine coolant temperature: 80 C {176
1.
F} or more)
2. Stop the engine and set the starter key to the "ON" position.
3. Select [Engine] and check if P0104 has been detected.
SHTS021270300196
YES
Measurement
conditions connections
Engine ECU (sig-
After engine warm nal check har-
up, with engine ness)
AFSI (E74) –
idling
AGD6 (E78)
Replace the air flow sensor.
Perform "After-inspection work" of INFOR-
MATION section.
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.
Tester
Standard values
5 – 6 kHz
NO
NO