HYBRID/TROUBLE SHOOTING
3–127
INSPECTION PROCEDURE: P0A07 (TC7E)
1.
Set the starter key to the "LOCK" position.
2.
Disconnect the inverter cooling pump and the HV ECU2 connec-
tors.
3.
For the 3rd terminal of inverter cooling pump connector, inspect
the signal line of PCU wire harness (lower side) for short circuit.
(See "Inspecting the PCU harness signal line for short circuit.")
NO
YES
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.
Set the starter key to the "LOCK" position and wait for 1 minute.
6.
Set the starter key to the "ON" position and wait for 1 minute.
7.
In [Fault Information] on the diagnosis tool screen, check if P0A07-
7E is detected.
NO
YES
1
Inspecting the signal line of PCU wire harness (lower side) for short circuit
Measurement
conditions
Tester
connections
Standard values
Starter key: LOCK
Inverter cooling
pump connector
3rd terminal
–
Each signal line
10 k
or more
Is any defect found?
Replace the PCU wire harness (lower side).
Replace the inverter cooling pump.
After replacement, go to step 2.
2
Reproduction check [HINO-DX]
SHTS03ZZZ0300088
Is DTC P0A07-7E detected?
Replace the HV ECU.
The inspection is completed.
