HYBRID/TROUBLE SHOOTING
3–296
1.
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 cir-
cuit.")
NO
YES
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 P3128-
7D is detected.
NO
YES
9
Inspecting the signal line of PCU wire harness (lower side) for short circuit
Measurement
conditions
Tester
connections
Standard values
Starter key: LOCK
Inverter cooling
radiator fan con-
nector
3rd terminal
–
Each signal line
10 k
or more
Is any defect found?
Replace the PCU wire harness (lower side).
Replace the inverter cooling radiator fan.
After replacement, go to step 10.
10
Reproduction check [HINO-DX]
SHTS03ZZZ0300203
Is DTC P3128-7D detected?
Replace the HV ECU.
The inspection is completed.
