HYBRID/TROUBLE SHOOTING
3–77
6
Inspecting the
PCU wire har-
ness (lower
side) for short
circuit
1. Set the starter key to the
"LOCK" position.
2. Connect the PCU harness
(24P) connector.
3. Disconnect the HV ECU1 con-
nector.
4. Set the starter key to the "ON"
position.
5. Using the electrical tester, mea-
sure the voltage between the
54th terminal of HV ECU1 con-
nector and the ground.
<Measurement conditions>
Starter key: ON
<Tester connections>
HV ECU1 connector
4th terminal
–
GND
<Standard values>
Less than 1 V
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 7.
Replace the
PCU wire har-
ness (lower
side).
7
Inspecting the
signal line of
PCU wire har-
ness (lower
side) for short
circuit
1. Set the starter key to the
"LOCK" position.
2. For the 12th terminal of PCU
harness (24P) lower-side con-
nector, inspect the signal line of
PCU wire harness (lower side)
for short circuit. (See "Inspect-
ing the PCU harness signal line
for short circuit.")
<Measurement conditions>
Starter key: LOCK
<Tester connections>
PCU harness (24P) lower-side
connector
12th terminal
–
Each signal line
<Standard values>
10 k
or more
Defect is
found: Go to
YES.
Defect is not
found: Go to
NO.
Replace the
PCU wire har-
ness (lower
side).
Go to step 8.
8
Reproduction
check [HINO-
DX]
1. Connect all the connectors that
have been disconnected to
restore the system.
2. Connect the diagnosis tool
(HINO-DX) to the vehicle.
3. Set the starter key to the "ON"
position.
4. Clear the malfunction history.
5. Perform a test run. (The vehicle
speed and the engine speed
remain at 25 km/h or more and
1500 r/min or more, respec-
tively, for 30 seconds or more.)
6. In [Fault Information] on the
diagnosis tool screen, check if
P0617-59 is detected.
DTC P0617-
59 is detected:
Go to YES.
DTC P0617-
59 is not
detected: Go
to NO.
Replace the
HV ECU.
The inspec-
tion is com-
pleted.
(If no repair or
parts replace-
ment is per-
formed, there
may be an
improper con-
tact due to
connector dis-
connection.)
P0617 (TC59)
Malfunction of starter switch
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No
