HYBRID/TROUBLE SHOOTING
3–321
7
Inspecting the
voltage of
PCU wire har-
ness (lower
side)
1. Connect the inverter start relay
and PCU harness (24P) con-
nectors.
2. Disconnect the inverter cooling
pump connector.
3. Set the starter key to the "ON"
position.
4. Using the electrical tester, mea-
sure the voltage between the
connector terminals of inverter
cooling pump.
<Measurement conditions>
Starter key: ON
<Tester connections>
Inverter cooling pump connector
1st terminal
–
4th terminal
<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 8.
Replace the
PCU wire har-
ness (lower
side).
8
Inspecting the
continuity of
PCU wire har-
ness (lower
side)
1. Set the starter key to the
"LOCK" position.
2. Disconnect the HV ECU1 con-
nector.
3. Using the electrical tester, mea-
sure the resistance between
the inverter cooling pump con-
nector and the HV ECU1 con-
nector terminal.
<Measurement conditions>
Starter key: LOCK
<Tester connections>
Inverter cooling pump connector
–
HV ECU1 connector
2nd terminal
–
26th terminal
<Standard values>
Less than 1
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 9.
Replace the
PCU wire har-
ness (lower
side).
9
Inspecting the
signal line of
PCU wire har-
ness (lower
side) for short
circuit
1. For the 2nd 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.")
<Measurement conditions>
Starter key: LOCK
<Tester connections>
Inverter cooling pump connector
2nd 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 pump.
After replace-
ment, go to
step 10.
P314D (TC81)
Abnormality in HV water pump revolution
number signal High
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No