HYBRID/TROUBLE SHOOTING
3–522
CHECKLIST: P0A1D (TC21)
P0A1D (TC21)
HV ECU abnormality
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No
1
Reading the
DTC (other
system)
[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. In [Fault Information] of other
system, check if any DTC
related to the CAN communica-
tion system is detected.
DTC related to
the CAN com-
munication
system is
detected: Go
to YES.
DTC related to
the CAN com-
munication
system is not
detected: Go
to NO.
Perform trou-
bleshooting for
each of related
DTC.
Go to step 2.
2
Reading the
DTC (HV sys-
tem) [HINO-
DX]
1. Check that reading of DTC is
available and that no DTC is
detected in [Fault Information]
on the diagnosis tool screen.
DTC other
than P0A1D-
21 is detected:
Go to YES.
DTC other
than P0A1D-
21 is not
detected: Go
to NO.
Perform trou-
bleshooting for
each of related
DTC.
Go to step 3.
3
Reproduction
check [HINO-
DX]
1. Clear the malfunction history.
2. Set the starter key to the
"LOCK" position and wait for 1
minute.
3. Set the starter key to the "ON"
position.
4. In [Fault Information] on the
diagnosis tool screen, check if
P0A1D-21 is detected.
DTC P0A1D-
21 is detected:
Go to YES.
DTC P0A1D-
21 is not
detected: Go
to NO.
Replace the
HV ECU.
The inspec-
tion is com-
pleted.
(Temporary
actuation of
protection
function due to
external noise)
