HYBRID/TROUBLE SHOOTING
3–172
CHECKLIST: P0A84 (TC66)
P0A84 (TC66)
Abnormality in HV battery cooling fan
drive signal Low
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No
1
Reading the
DTC [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] on the
diagnosis tool screen, check if
any of the following DTC
related to malfunction of HV
battery start relay is detected.
•
P33B1-64, P33B2-63
DTC other
than P0A84-
66 is detected:
Go to YES.
DTC other
than P0A84-
66 is not
detected: Go
to NO.
Perform trou-
bleshooting for
each of related
DTC.
Go to step 2.
2
Inspecting the
voltage of
vehicle wire
harness
1. Set the starter key to the
"LOCK" position.
2. Disconnect the PCU harness
(24P) connector.
3. Set the starter key to the "ON"
position.
4. Using the electrical tester, mea-
sure the voltage between the
1st terminal of PCU harness
(24P) vehicle-side connector
and the ground.
<Measurement conditions>
Starter key: ON
<Tester connections>
PCU harness (24P) vehicle-side
connector
1st terminal
–
GND
<Standard values>
9 V or more
The mea-
sured value is
within the
range of stan-
dard value: Go
to YES.
The mea-
sured value is
not within the
range of stan-
dard value: Go
to NO.
Go to step 3.
Inspect the
power supply
circuit ([PCI-B
20A] fuse and
wire harness).
