2001 TOYOTA PRIUS battery

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±203
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
247GND short in motor temperature sensor
248Motor Temperature SensorMotor temperature sensor malfunction
249
Motor Tem erature Sensor
MalfunctionOpen or +B short in motor temperature sensor
250Motor temperature sensor performance problem
253Generator resolver inter±phase short
P3120
254Generator Resolver Malfunc-
Generator resolver inter±phase short (When there is a history that the
state of malfunction continued during inverter fail safe mode)
P3120255
Generator Resolver Malfunc
tionOpen or short in generator resolver circuit
256Open or short in generator resolver circuit (When there is a history that the
state of malfunction continued during inverter fail safe mode)
257GND short in generator temperature sensor
258Generator Temperature Sen-Generator temperature sensor malfunction
259
Generator Tem erature Sen
sor MalfunctionOpen or +B short in generator temperature sensor
260Generator temperature sensor performance problem
263+B short in DCDC converter NODD wiring
264DCDC Converter MalfunctionDCDC converter malfunction
265
DCDC Converter Malfunction
Open or GND short in DCDC converter NODD wiring
266Open or GND short in inverter voltage signal circuit
267+B short in inverter voltage signal circuit
268Inverter voltage signal is inconsistent with battery voltage
269VM MalfunctionInverter voltage sensor malfunction
270
Abnormality of line connection of inverter voltage signal circuit (When there
is a history that the state of malfunction continued during inverter fail safe
mode)
272Motor PWN Line Connection
MalfunctionAbnormality of line connection of motor PWM (When there is a history that
the state of malfunction continued during inverter fail safe mode)
273Motor Inverter Gate Malfunc-
tionMotor inverter malfunction
P3125274Mt I t T tOpen or +B short in motor inverter temperature sensor
275Motor Inverter TemperatureGND short in motor inverter temperature sensor
276S M lf tiMotor inverter temperature sensor malfunction
277Sensor MalfunctionMotor inverter temperature sensor performance problem
278+B short in motor inverter stop signal circuit
279Over voltage of inverter
280Motor Inverter SinvOpen or GND short in motor inverter stop signal circuit
281
Motor Inverter Sinv
Voltage drop of inverter power source
282Inverter circuit broken
283+B short in motor inverter fail signal circuit
284Inverter overheating
285Motor Inverter FinvOpen or GND short in motor inverter fail signal circuit
286
Motor Inverter Finv
Inverter circuit broken
287Inverter internal short

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±209
2001 PRIUS (RM778U) MWU (H11±6)
GInverter, M±WU (I9±3)
MUU (H11±4)RInverter, M±UU (I9±1)
MVU (H11±5)WInverter, M±VU (I9±2)
MIVG (H11±26)BInverter, M±GINV (I9±6)
MIVA (H11±16)BInverter, M±IVA (I10±1)
MIVB (H11±7)WInverter, M±IVB (I10±3)
MIWB (H11±17)GInverter, M±IWB (I10±4)
VB (H11±20)YInverter, VB (I10±5)
MIWA (H11±25)RInverter, M±IWA (I10±2)
GIVA (H11±19)BInverter, G±IVA (I12±1)
GIVB (H11±8)WInverter, G±IVB (I12±3)
GIWB (H11±18)GInverter, G±IWB (I12±4)
GIWA (H11±28)RInverter, G±IWA (I12±2)
GSDN (H11±12)YInverter, G±SDOWN (I11±4)
GIT (H11±23)LInverter, G±INVT (I11±5)
GWU (H11±3)GInverter, G±WU (I11±3)
GVU (H11±2)WInverter, G±VU (I11±2)
GUU (H11±1)RInverter, G±UU (I11±1)
GIVG (H11±27)BInverter, G±GINV (I11±6)
MFIV (H11±14)BInverter, M±FINV (I10±8)
GSIV (H11±15)GInverter, G±SINV (I12±7)
GFIV (H11±24)BInverter, G±FINV (I12±8)
ETH+ (H14±28)PEngine ECU, ETH+ (E9±28)
ETH± (H14±27)LEngine ECU, ETH± (E9±27)
HTE+ (H14±19)YEngine ECU, H TE+ (E9±19)
HTE± (H14±29)BREngine ECU, H TE± (E9±18)
HTB+ (H14±20)LGBrake ECU, HVI+ (B10±24)
HTB± (H14±30)VBrake ECU, HVI± (B10±16)
BTH+ (H14±18)GBrake ECU, HVO+ (B10±14)
BTH± (H14±17)RBrake ECU, HVO± (B10±22)
FCVC (H14±7)B±WTransponder Key ECU, HEVC (T4±8)
CON1 (H12±13)VSystem Main Relay (S8±3)
CON2 (H12±2)GRSystem Main Relay (S8±4)
CON3 (H13±1)PSystem Main Relay (S8±5)
HTD+ (H13±2)WBattery ECU, HTD+ (B17±6)
HTD± (H13±20)BBattery ECU, HTD± (B17±7)
DTD+ (H13±19)RBattery ECU, DTD+ (B17±18)
DTD± (H13±18)GBattery ECU, DTD± (B17±19)

A14147
H14Hybrid Vehicle
Control ECU
H14
BatteryMAIN
B±G1 1
F1811 1
111
F13 2
3
2
2 Engine Room J/BSTP
ST1± G±W
J15 E
2 J14D J/C
G±W S3
Stop Light
SW
R±B
R±B4B±Y B±W B±W B
B
J24 J25 ID1J/C
B±W
I15
Ignition SW
W±RW±R
67
9
IG2AM2
Instrument Panel J/B
STOP 2C
2K2H 2G9
1J 1BAM2
B
W
F12 F11
DC/DC
Fusible Link Block No. 1 Fusible Link
Block No. 16
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±215
2001 PRIUS (RM778U)
DTC P1520 Stop Light Switch (Cruise Control System)
Malfunction
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the cruise control system and inhibits the operation of the cruise
control.
It detects faulty output of the STP and ST1± signals sent from the stop light switch or an error signal from
the brake ECU.
DTC P1520 ± Information code 115
INF. code.Detecting ConditionTrouble Area
11 5Open or short in stop light switch circuit

Stop light switch

Wire harness

Brake ECU
WIRING DIAGRAM
DI82R±02

A14146
BatteryB±G 1 1
F18 F13
Fusible Link
Block No. 2Hybrid Vehicle
Control ECU
H14
Engine Room J/B B
B J/C
1BFusible Link
Block No. 1
F12 B
1
MAIN 1F11
1 HV G±YJ2
J3G±Y
G±Y
IA143
BATT
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±219
2001 PRIUS (RM778U)
DTC P1600 BATT Malfunction
CIRCUIT DESCRIPTION
Since the ECU back±up power source is used for DTC and freeze frame data memory, the back±up power
source (BATT) continues to be supplied to the HV ECU even though the ignition switch is turned OFF.
DTC P1600 ± Information code 117
INF. code.Detecting ConditionTrouble Area
11 7HV ECU back±up power source circuit malfunction
HV Fuse

Wire harness
WIRING DIAGRAM
DI82T±02

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±225
2001 PRIUS (RM778U)
DTC P3004 Power Cable Malfunction
CIRCUIT DESCRIPTION
If the inverter voltage is not decreased after discharge with the ignition switch OFF, the VM sensor in the
inverter is determined as defective.
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 P3004 ± Information code 130
INF. Code.Detecting ConditionTrouble Area
130When HV battery voltage becomes lower than inverter voltageConverter & inverter assembly
INSPECTION PROCEDURE
1 Are there any other codes of HV ECU being outputs?
YES Go to relevant DTC chart.
NO
Replace converter & inverter assembly.
DI82X±02

DI±226
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)
DTC P3004 ± Information code 131
INF. Code.Detecting ConditionTrouble Area
131
When condition (a), (b) or (c) is detected:
(d) Main fuse blown out
(e) Service plug disconnected
(f) Limiter resistance cut off
Service plug

Power cable

System main relay
INSPECTION PROCEDURE
1 Is DTC of battery ECU being output?
YES Check the applicable DTC.
NO
2 Check condition of service plug terminal (Loosened, poor contact, etc.).
NG Replace service plug.
OK
3 Check continuity of power cable.
OK:
Continuity :Less than 1 W
NG Replace the power cable.
OK
Replace the system main relay.

A15179
BA
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±227
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
DTC P3004 ± Information code 132
INF. Code.Detecting ConditionTrouble Area
132When inverter voltage sensor is malfunctioning or limiter resis-
tance value increases.
Converter & inverter assembly

Power cable

System main relay
INSPECTION PROCEDURE
1 Are other information codes recorded?
YES Check applicable information code (See page
DI±197).
NO
2 Check continuity of limiter resistance in system main relay.
PREPARATION:
Remove the system main relay.
CHECK:
(a) Apply battery voltage across terminals 1 and 3.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals A and B.
OK:
Continuity
NG Replace the system main relay.
OK
Check continuity and replace power cable.

DI±228
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
The HV ECU gives warning to the driver and performs the fail safe control, according to the abnormal signal
received from the battery ECU.
DTC P3004 ± Information code 133
INF. Code.Detecting ConditionTrouble Area
133Input of abnormal signal from battery ECU
HV battery system
INSPECTION PROCEDURE
If the information code 133 output, after confirming the DTC of the HV Battery ECU, check and repair the
applicable DTC. After repairing it, record the DTC of the HV ECU, freeze frame data and history of operation.
Then, clear the DTC and check it one more time after starting the system again (ºREADYº light ON).