Hino 195h Series, Руководство по ремонту

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HYBRID/TROUBLE SHOOTING 3–305
CHECKLIST: P3129 (TC7C)
P3129 (TC7C)
Abnormality in HV radiator fan revolution
number High
Inspection Procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Inspecting the
inverter cool-
ing radiator fan
1. Check that the inverter cooling
radiator fan is free from dam-
age.
Defect is
found: Go to
YES.
Defect is not
found: Go to
NO.
Replace the
inverter cool-
ing radiator
fan.
Go to step 2.
2
Inspecting the
signal line of
PCU wire har-
ness (lower
side) for short
circuit
1. Set the starter key to the
"LOCK" position.
2. Disconnect the connectors of
HV ECU1 and inverter cooling
radiator fan.
3. For the 3rd terminal of inverter
cooling radiator fan connector,
inspect the signal line of PCU
wire harness (lower side) for
short circuit. (See "Inspecting
the PCU harness signal line for
short circuit.")
<Measurement conditions>
Starter key: LOCK
<Tester connections>
Inverter cooling radiator fan con-
nector
3rd 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).
Replace the
inverter cool-
ing radiator
fan.
After replace-
ment, go to
step 3.
3
Reproduction
check [HINO-
DX]
1. Connect all the connectors that
have been disconnected to
restore the system.
2. Set the starter key to the
"LOCK" position.
3. Connect the diagnosis tool
(HINO-DX) to the vehicle.
4. Set the starter key to the "ON"
position.
5. Clear the malfunction history.
6. Set the starter key to the "ON"
position and wait for 1 minute.
7. Set the starter key to the
"LOCK" position and wait for 1
minute.
8. Set the starter key to the "ON"
position and wait for 1 minute.
9. In [Fault Information] on the
diagnosis tool screen, check if
P3129-7C is detected.
DTC P3129-
7C is detected:
Go to YES.
DTC P3129-
7C is not
detected: Go
to NO.
Replace the
HV ECU.
The inspec-
tion is com-
pleted.