2001 TOYOTA PRIUS Service Repair Manual

A16880
The difference of the voltage
between the date VMAX and VMIN
SwingVMAX data
The engine start Test startTime
Voltage
Swing
Swing
SwingVMIN data
DI±346
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U) 4/27/01
OK:
Standard voltage swing: 2 V or more
NG Replace the battery ECU (See page IN±41).
OK
4 Check tightening condition of busbar module of block and correct if necessary.
OK:
The nut is not loosened.
Torque: 6 N´m (61 kgf´cm, 4.4 ft´lbf)
NG Tighten the nut.
OK
5 Check if busbar module connector is properly connected.
NG Connect properly, repair or replace.
OK

± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±347
2001 PRIUS (RM778U)
6 Continuity check of the busbar module.
NG Replace the busber module
(See page IN±41).
OK
Replace the battery ECU (See page IN±41).

A13557
Battery Temperature SensorBattery ECU
TB1 1
L
B
W
R
G2
3
4
5
6
7
9
10 8TB2
TB3
TB4 GB1
GB2
GB3
GB4
TB5
GB5 L
B
W
R
G DI±348
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U)
DTC P3060 Battery Temperature sensor Circuit Malfunc-
tion
CIRCUIT DESCRIPTION
A thermistor in the sensor set in a battery pack changes its resistance according to battery bemperature.
As the battery temperature falls or rises, the resistance rises or falls accordingly.
DTC No.DTC Detecting ConditionTrouble Area
P3060

Open or short in battery temperature sensor circuit

Battery temperature sensor circuit range/performance prob-
lem
Battery temperature sensor

Connector and wire harness
WIRING DIAGRAM
DI82E±01

± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±349
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P3060) being output?
YES Go to relevant DTC chart.
NO
2 Check resistance of battery temperature sensor.
PREPARATION:
(a) Remove the battery cover (See page HV±5).
(b) Disconnect the battery temperature sensor connector.
CHECK:
Using an ohmmeter, measure the resistance between terminals.
OK:
Standard resistance:
TerminalsResistance (at 25 °C (77°F)
1 ± 29 ± 11 kW
3 ± 49 ± 11 kW
5 ± 69 ± 11 kW
7 ± 89 ± 11 kW
9 ± 109 ± 11 kW
NG Replace the battery temperature sensor.
OK
Check fitting of battery temperature sensor
connector and correct if necessary.

A14079
Battery ECU
B19
Battery Fan Relay
B15
Battery
Blower
Motor
B16
Battery Blower
Motor Controller
Fusible Link Block No. 1
Fusible Link Block No. 2BATT FAN Engine Room J/B
Battery
BI BJ32
J/C L ± R L ± B LG ± R
L ± B L ± R
L ± R
MAINW ± B
W ± B B ± G
BJ J33 BJ32 C
1
F181
F131
F122
1B 8
1J7
IH13 1
5 2
L1
2
L3
1 429
B182
B188
B18
W ± B
W ± B B
13
J/CFCTL1
VM
SI
VM SI
+B E
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±351
2001 PRIUS (RM778U)
DTC P3077 Battery Cooling Fan Motor Circuit Malfunc-
tion
CIRCUIT DESCRIPTION
To control rise in battery temperature during driving and charging, the battery fan operation is controlled in
3 levels depending on battery temperature.
DTC No.DTC Detecting ConditionTrouble Area
P3077
Electric error in battery cooling fan motor circuit continues for
10 sec.
(2 trip detection logic)
Battery blower motor

Battery fan relay

Battery blower motor controller

Wire harness
WIRING DIAGRAM
DI82G±01