2001 TOYOTA PRIUS Service Repair Manual

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Page 793 of 1943

TOYOTA PRIUS 2001 Service Repair Manual DI±196
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U) STEP ACC&BRAKE
Stepping both accelerator & brake at the same time
STEPP ACC IN NStepping accelerator in N position
STOP SW CON

Page 794 of 1943

TOYOTA PRIUS 2001 Service Repair Manual DI82L±02
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±197
2001 PRIUS (RM778U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due t

Page 795 of 1943

TOYOTA PRIUS 2001 Service Repair Manual DI±198
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)P3107
(DI±242)
Airbag ECU Communication Cir-
cuit MalfunctionWire Harness
Airbag Sensor Assembly
P3108
(DI±244)A/C Amplif

Page 796 of 1943

TOYOTA PRIUS 2001 Service Repair Manual ± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±199
2001 PRIUS (RM778U)
INFORMATION CODE (TOYOTA Hand±held tester only)
DTC NO.INF. CodeDetection ItemDetecting Condition
B2799101Immobilizer Malfunc

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±199
2001 PRIUS (RM778U)
INFORMATION CODE (TOYOTA Hand±held tester only)
DTC NO.INF. CodeDetection ItemDetecting Condition
B2799101Immobilizer MalfunctionNo input of signal from transponder key ECU
C2692102Regenerative Brake CheckRegenerative brake check
C2693103Regenerative Brake CheckRegenerative brake check
104Open or short in main accelerator sensor circuit
105+B short in main accelerator sensor circuit
106Main sensor internal error
107Open or short in sub accelerator sensor circuit
108+B short in sub accelerator sensor circuit
P1120109Accelerator Pedal Position
Sensor Circuit MalfunctionSub sensor internal errorP1120
11 0Sensor Circuit MalfunctionWhen difference between main sensor value and sub sensor value is large
111When sub sensor value changes while main sensor value does not
11 2When main sensor value changes while sub sensor value does not
11 3When any of the information code 104 ± 112 continues to appear
11 4Accelerator pedal not smoothly returning to original position
P152011 5
Stop Light Switch
(Cruise Control System)
Malfunction
Open or short in stop light switch circuit
P156611 6Cruise Control System
MalfunctionWhen STP signal of HV ECU is inconsistent with that of brake ECU, with
cruise control indicator ON
P160011 7BATT MalfunctionHV ECU back±up power source circuit malfunction
11 8When more than 2 main signals are ON
11 9P k/N t l P iti S it hWhen main signal is not turned ON even though sub signal has been input
P1780120Park/Neutral Position Switch
System MalfunctionOpen or short in sub sensor circuit
121
System Malfunction
When shift position detected by main signal is different from that detected
by sub signal
123HV B tt M lf tiInput of abnormal signal from battery ECU (HV battery system malfunction)
125HV Battery MalfunctionInput of abnormal signal from battery ECU (high voltage fuse blown out)
P3000388Discharge Inhibition Control
MalfunctionWhen charged battery is low due to leaving the vehicle in N position, gas
shortage or HV system malfunction
389Drop of High VoltageWhen main battery is dead or main battery is dead due to HV system mal-
function
P3001129HV Battery ECU MalfunctionBattery ECU malfunction
130HV Battery MalfunctionWhen HV battery voltage becomes lower than inverter voltage
P3004
131
PCblMlfti
When main fuse is blown out, service plug is disconnected or limiter resis-
tance is cut off
P3004
132
Power Cable MalfunctionWhen inverter voltage sensor is malfunctioning or limiter resistance value
increases
133HV Battery MalfunctionInput of abnormal signal from battery ECU
134HV ECU I t l EHV ECU Internal Error
135HV ECU Internal ErrorHV ECU Internal Error
P3100136GO Signal ErrorOpen or short in GO signal circuit
137Engine Speed Sensor
MalfunctionEngine speed sensor malfunction

Page 797 of 1943

TOYOTA PRIUS 2001 Service Repair Manual DI±200
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
127+B short in IB terminal circuit of HV ECU
128IB Circuit MalfunctionOpen o

Page 798 of 1943

TOYOTA PRIUS 2001 Service Repair Manual ± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±201
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
171HV ECU internal error
172Motor REF Signal MalfunctionHV ECU internal erro

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±201
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
171HV ECU internal error
172Motor REF Signal MalfunctionHV ECU internal error
173
Motor REF Signal Malfunction
HV ECU internal error
174Motor Inverter Current Sen-HV ECU internal error
175
Motor Inverter Current Sen
sor MalfunctionHV ECU internal error
176Motor Gate Shutdown Signal
Line Connection MalfunctionHV ECU internal error
177HV ECU internal error
178Motor Main CPU MalfunctionHV ECU internal error
179
Motor Main CPU Malfunction
HV ECU internal error
180HV ECU internal error
181HV ECU internal error
182HV ECU internal error
183Rotation Angle Check CPU
MalfunctionHV ECU internal error
184MalfunctionHV ECU internal error
185HV ECU internal error
186HV ECU internal error
187Important RAM MalfunctionHV ECU internal error
188HV ECU internal error
P3100189HV ECU internal error
190HV ECU internal error
191HV ECU internal error
192Generator CPU MalfunctionHV ECU internal error
193
Generator CPU Malfunction
HV ECU internal error
194HV ECU internal error
195HV ECU internal error
196HV ECU internal error
310Generator PWN Line Con-
nection MalfunctionHV ECU internal error
197HV ECU internal error
198HV ECU internal error
199G t R/D M lf tiHV ECU internal error
200Generator R/D MalfunctionHV ECU internal error
201HV ECU internal error
202HV ECU internal error
203Generator Shutdown Signal
Line Connection MalfunctionHV ECU internal error
390Charge Inhibition Control Mal-
functionHV ECU internal error
204Ei St Mlf tiInput of abnormal signal from the ECM (abnormal engine output)
P3101205Engine System MalfunctionInput of abnormal signal from the ECM (engine unable to start)P3101
238Transaxle MalfunctionWhen engine does not start even though cranking it
206
P3105207Battery ECU Communication
Circuit Malfunction
When communication between battery ECU and HV ECU is abnormal 1
sec after ignition is turned ONP3105
208Circuit Malfunctionsec. after ignition is turned ON

Page 799 of 1943

TOYOTA PRIUS 2001 Service Repair Manual DI±202
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
209
210When communication between ECM and HV ECU is abnormal 1 sec. after
ig

DI±202
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
209
210When communication between ECM and HV ECU is abnormal 1 sec. after
ignition is turned ON
P3106211ECM Communication Circuit
Malfunction
ignition is turned ON
P3106
212MalfunctionInput of abnormal signal from ECM
394When ECM does not operate
213
P3107214Airbag ECU Communication
Circuit Malfunction
When communication between airbag ECU and HV ECU is abnormal 10
sec after ignition is turned ONP3107
215Circuit Malfunctionsec. after ignition is turned ON
P3108216A/C Amplifier CommunicationWh i ti f A/C lifi t HV ECU i b lP3108217
A/C Am lifier Communication
Circuit MalfunctionWhen communication from A/C amplifier to HV ECU is abnormal
218
219When communication between brake ECU and HV ECU is abnormal 1.5
P3109220Brake ECU Communication
Circuit Malfunction
When communication between brake ECU and HV ECU is abnormal 1.5
sec. after ignition is turned ONP3109
221Circuit Malfunctiong
222When abnormal data is received from brake ECU
P3110223IGCT RelayWhen IGCT relay is always closed
224SMR C t1 M lf tiOpen or +B short in system main relay No. 1 circuit
225SMR Cont1 MalfunctionShort in system main relay No. 1 circuit
226SMR C t2 M lf tiOpen or +B short in system main relay No. 2 circuit
227SMR Cont2 MalfunctionShort in system main relay No. 2 circuit
P3115228SMR C t3 M lf tiOpen or +B short in system main relay No. 3 circuitP3115
229SMR Cont3 MalfunctionShort in system main relay No. 3 circuit
231System main relay + terminal deposited
232Deposit of SMRSystem main relay ± terminal deposited
233
De osit of SMR
System main relay + & ± terminal deposited
234Small reduction of motor magnetism
235E B l M lf tiLarge reduction of motor magnetism
236Energy Balance MalfunctionSmall reduction of generator magnetism
237Large reduction of generator magnetism
239Shaft damaged
240HV T l M lf tiGenerator locked
P3120241HV Transaxle MalfunctionTorque limiter slidingP3120242Planetary gear locked
243Motor resolver inter±phase short
244
Mt R l Mlf ti
Motor resolver inter±phase short (When there is a history that the state of
malfunction continued during inverter fail safe mode)
245Motor Resolver MalfunctionOpen or short in motor resolver circuit
246Open or short in motor resolver circuit (When there is a history that the
state of malfunction continued during inverter fail safe mode)

Page 800 of 1943

TOYOTA PRIUS 2001 Service Repair Manual ± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±203
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
247GND short in motor temperature sensor
248Motor Temperature SensorMotor te

± 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

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