HYBRID/TROUBLE SHOOTING
3–791
CHECKLIST: U0074 (TC3E)
U0074 (TC3E)
Abnormality in CAN communication with
inverter (DIAG CAN)
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No
1
Implementing
common
inspection
items
1. Perform the basic inspection
items for abnormality of the HV
DIAG CAN system.
•
Refer to the "CAN COMMUNI-
CATION (HYBRID SYSTEM)"
in the chapter "CONTROL
SYSTEM".
Defect is
found: Go to
YES.
Defect is not
found: Go to
NO.
Repair or
replace the
malfunction-
ing part
detected by
the common
inspection
items
Go to step 2.
2
Reproduction
check [HINO-
DX]
1. Set the starter key to the
"LOCK" position.
2. Connect the diagnosis tool
(HINO-DX) to the vehicle.
3. Set the starter key to the "ON"
position.
4. Clear the malfunction history of
the HV ECU and inverter.
5. Set the starter key to the
"LOCK" position and wait for
approximately 1 minute.
6. Set the starter key to the "ON"
position.
7. In [Fault Information] on the
diagnosis tool screen, check if
U0074-3E is detected.
DTC U0074-
3E is detected:
Go to YES.
DTC U0074-
3E is not
detected: Go
to NO.
Refer to the
"DIAGNOSIS
CAN COMMU-
NICATION
LINE
(HYBRID)" in
the chapter
"CONTROL
SYSTEM".
The inspec-
tion is com-
pleted.
(Temporary
actuation of
protection
function due to
external noise
or connector
terminal con-
tact resis-
tance return)
