sensor TOYOTA PRIUS 2001 Service Repair Manual

A14123
InverterHybrid Vehicle
Control ECU
G±IVAB
5
I11
G±INVTL W
G
R 2
I124
I123
I121
I12
G±IWA G±IWB G±IVBGIVA
GITGIWA GIWB GIVB 19
8
18
28
23
H11H11 H11 H11 H11
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±297
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the generator inverter current sensor. It detects the malfunction of
the sensor system, not of the high voltage system.
DTC P3125 ± Information code 329, 331, 333, 337, 339, 341
INF. Code.Detecting ConditionTrouble Area
329
331
333When there is a history that the state of malfunction contin-
Converter & inverter assembly
337
When there is a history that the state of malfunction contin
ued during inverter fail safe mode

Converter & inverter assembly

Wire harness
339
g
341
WIRING DIAGRAM

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±299
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the generator inverter current sensor. It detects the malfunction of
the sensor system, not of the high voltage system.
DTC P3125 ± Information code 344, 345
INF. Code.Detecting ConditionTrouble Area
344Failure in monitoring generator torque performanceCt&it bl345Abnormal current value of generator
Converter & inverter assembly
INSPECTION PROCEDURE
If the information code 344 or 345 is output, check if other DTC or information codes are recorded. If they
are recorded, check and repair those codes first.
If the information code 344 or 345 alone is recorded, replace the converter & inverter assembly.

A14136
C3
Circuit
Breaker
Sensor1
2
H12AS1G Hybrid Vehicle
Control ECU
BR±B
G±RH1214
15
AS1
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±305
2001 PRIUS (RM778U)
DTC P3135 Circuit Breaker Sensor Malfunction
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the circuit breaker sensor (collision signal) and gives warning
to the driver if malfunction is detected.
DTC P3135 ± Information code 348, 349
INF. code.Detecting ConditionTrouble Area
348GND short in circuit breaker sensor
Circuit breaker sensor
349Open or +B short in circuit breaker sensor

Circuit breaker sensor

Wire harness
WIRING DIAGRAM
DI83A±02

DI±306
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check for open, short and +B short in wire harness between circuit breaker sen-
sor No. 1 and No. 2 terminals and HV ECU AS1G and AS1 terminals
(See page IN±41).
HINT:
Confirm that there is no open circuit in the wire harness. The circuit breaker sensor circuit has +B short if
the voltage of the HV ECU AS1 terminal is more than 5V with the ignition ON.
NG Repair or replace wire harness.
OK
Check for open in resistance between circuit breaker sensor terminals and then replace circuit
breaker sensor (Circuit breaker sensor resistance: 820 ± 82 W).

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±307
2001 PRIUS (RM778U)
DTC P3140 Interlock Malfunction
CIRCUIT DESCRIPTION
If the HV ECU detects the operation of the safety devices (removal of the service plug, inverter terminal cover
and sensor cover) while the vehicle is not running (with the vehicle is stopped), it will shut down the system
main relay. It the safety devices are correctly installed, it will resume the normal operation after the power
source is supplied again. If it does not, there is a possibility of an open circuit, so perform the same inspection
as the information code 351.
HINT:

When using an OBD scan tool other than TOYOTA hand±held tester, check all the steps.

When using TOYOTA hand±held tester, confirm the information code and check it.
DTC P3140 ± Information code 350
INF. code.Detecting ConditionTrouble Area
350Safety devices operating with vehicle is stopped (ILK signal
ON)±
DI83B±02

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±309
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check installation condition of inverter terminal cover and sensor cover.
NG Install them correctly.
OK
2 Check continuity of wire harness between interlock switch No. 1 terminal and HV
ECU ILK terminal and interlock switch No. 2 terminal and inverter CVRSW termi-
nal (See page IN±41).
OK:
Continuity: Less than 1 W
NG Repair or replace wire harness.
OK
3 Check continuity between inverter CVRSW terminal and body ground
(See page IN±41).
OK:
Continuity: Less than 1 W
NG Replace converter & inverter assembly.
OK
Confirm that interlock switch is defective and replace it.
Check interlock switch (See page HV±38)

A14138
2A C10
Combination
MeterHybrid Vehicle
Control ECU
L
H12 19
SPDI 68
IE1
13Instrument
Panel J/B
7
2BV±WJ/C
G
J27G
J28V±W V±W DI±310
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)
DTC P3145 Vehicle Speed Sensor Circuit Malfunction
CIRCUIT DESCRIPTION
DTC P3145 ± Information code 352
INF. code.Detecting ConditionTrouble Area
352No input of vehicle speed signal during cruise control driving
Wire harness
WIRING DIAGRAM
DI83C±02

DI±332
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U) 4/27/01
DTC P3009 Leak Detected
CIRCUIT DESCRIPTION
Electric leak from the high±voltage system, which may seriously harm the human body, is detected by this
code.
DTC No.DTC Detecting ConditionTrouble Area
P3009Electric leak from high±voltage system
(Insulating resistance of power cable is 100 kW or less.)

Power cable

HV transaxle

Converter & inverter assembly

Battery cover

System main relay

Battery temperature sensor

Battery ECU

Battery carrier catch bracket

Main battery cable

Service plug assembly

HV battery assembly
INSPECTION PROCEDURE
1 Is DTC P3125 of HV ECU being output?
YES Go to relevant DTC chart.
NO
2 Are there any other codes (Desides DTC P3009) being output?
YES Go to relevant DTC chart.
NO
DI82A±01

DI±338
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U) 4/27/01
11 Check insulating resistance of service plug assembly.
PREPARATION:
Under step 9 condition, disconnect the cable terminal of the service plug assembly from the HV battery.
CHECK:
Using a megger (500V), measure the insulating resistance between 2 cable terminals and body ground.
OK:
Insulating resistance: 10MW or more
NG Replace the service plug assembly.
OK
12 Check insulating resistance of HV battery temperature sensor.
PREPARATION:
Under step 10 condition, disconnect the HV battery temperature sensor connector from the battery ECU.
CHECK:
Using a megger (500V), measure the insulating resistance between each terminal of the HV battery temper-
ature sensor and body ground.
OK:
Insulating resistance: 10MW or more
NG Replace the HV battery temperature sensor.
OK

A14077
Battery ECU
GR ± B Busbar Module
14
V ± Y 2
GR 15
O3
LG ± B 16
L ± O 4
LG 17
P5
Y ± B 18
L ± W 6
L7
LG ± R 20
Y8
P ± L 21
G9
L ± R 22
G ± W 10
R23
W11
L ± B 24VBB1
VBB2
VBB3
VBB4
VBB5
VBB6
VBB7
VBB8
VBB9
VBB10
VBB11
VBB12
VBB13
VBB14
VBB15
VBB16
VBB17
VBB18
VBB19
GBB19 DI±344
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U) 4/27/01
DTC P3030 Battery Voltage Detective line Snapped
CIRCUIT DESCRIPTION
A voltage sensor set in a busbar module circuit measures a voltage of a pair of battery modules and sends
signals to the battery ECU.
DTC No.DTC Detecting ConditionTrouble Area
P3030Open in battery voltage detective line

Battery ECU

Open in battery voltage detective line

Wire harness, Busbar module
WIRING DIAGRAM
DI82D±01