2001 TOYOTA PRIUS torque

DI±204
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
288Motor inverter current sensor malfunction (V phase sub sensor)
289Open in motor inverter current sensor (V phase sub sensor)
290Motor inverter current sensor malfunction (V phase main sensor)
291(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
292Open in motor inverter current sensor (V phase main sensor)
293(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
294Mt I t C tSMotor inverter current sensor V phase performance problem
295
Motor Inverter Current Sen-
sor Malfunction(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
296Motor inverter current sensor malfunction (W phase sub sensor)
297Open in motor inverter current sensor (W phase sub sensor)
298Motor inverter current sensor malfunction (W phase main sensor)
299(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
300Open in motor inverter current sensor (W phase main sensor)
301(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
302Mt I t C tSMotor inverter current sensor W phase performance problem
303
Motor Inverter Current Sen-
sor Malfunction(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
304Motor Gate Shutdown Signal+B short in motor gate shutdown signal circuit
P3125305
Motor Gate Shutdown Signal
Line Connection MalfunctionOpen or GND short in motor gate shutdown signal circuitP3125
306Failure in Monitoring Motor
Torque PerformanceFailure in monitoring motor torque performance
307Abnormal Current Value of
MotorAbnormal current value of motor
308Detection of Collision SignalInput of collision signal from airbag or inverter
309Motor PWM Line Connection
MalfunctionOpen or short in generator inverter switching wiring (GUU, GVU, GWU)
311Generator Inverter Malfunc-
tionGenerator inverter malfunction
312Open or +B short in generator inverter temperature sensor
313Generator Inverter Tempera-GND short in generator inverter temperature sensor
314
Generator Inverter Tem era
ture Sensor MalfunctionGenerator inverter temperature sensor malfunction
315Generator inverter temperature sensor performance problem
316+B short in generator inverter stop signal circuit
317Over voltage of inverter
318Generator Inverter SinvOpen or GND short in generation inverter stop signal circuit
319
Generator Inverter Sinv
Voltage drop of inverter power source
320Inverter circuit broken
321+B short in generator inverter fail signal circuit
322Inverter overheating
323Generator Inverter FinvOpen or GND short in generator inverter fail signal circuit
324
Generator Inverter Finv
Inverter circuit broken
325Inverter internal short

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±205
2001 PRIUS (RM778U)DTC NO.
INF. CodeDetection ItemDetecting Condition
326Generator inverter current sensor malfunction (V phase sub sensor)
327Open in generator inverter current sensor (V phase sub sensor)
328Generator inverter current sensor malfunction (V phase main sensor)
329(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
330Open in generator inverter current sensor (V phase main sensor)
331(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
332Generator inverter current sensor V phase performance problem
333Generator Inverter Current
(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
334
Generator Inverter Current
Sensor MalfunctionGenerator inverter current sensor malfunction (W phase sub sensor)
335Open in generator inverter current sensor (W phase sub sensor)
P3125336Generator inverter current sensor malfunction (W phase main sensor)P3125
337(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
338Open in generator inverter current sensor (W phase main sensor)
339(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
340Generator inverter current sensor W phase performance problem
341(when there is a history that the state of malfunction continued during in-
verter fail safe mode)
342Motor Gate Shutdown Signal+B short in generator gate shutdown signal circuit
343
Motor Gate Shutdown Signal
Line ConnectionOpen or GND short in generator gate shutdown signal circuit
344Failure in Monitoring Genera-
tor Torque PerformanceFailure in monitoring generator torque performance
345Abnormal Current Value of
GeneratorAbnormal current value of generator
P3130346Inverter Cooling System Mal-Water pump system malfunctionP3130347
Inverter Cooling System Mal
functionElectric cooling fan system malfunction
P3135348Circuit Breaker Sensor Mal-GND short in circuit breaker sensorP3135349
Circuit Breaker Sensor Mal
functionOpen or +B short in circuit breaker sensor
P3140350It l kMlf tiSafety devices operating with vehicle is stopped (ILK signal ON)P3140351Interlock MalfunctionOpen circuit in interlock signal circuit while vehicle is running
P3145352Vehicle Speed Sensor Circuit
MalfunctionNo input of vehicle speed signal during cruise control driving

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±253
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the transmission system. Judging from a malfunction symptom, it
records one of the four information codes.
DTC P3120 ± Information code 239, 240, 241, 242
INF. Code.Detecting ConditionTrouble Area
239Shaft damaged
240Generator lockedHV t l241Torque limiter sliding
HV transaxle
242Planetary gear locked
INSPECTION PROCEDURE
When Information code 239 in stored, check that the connector of the crankshaft position sensor is properly
connected. If disconnected, the code 239 may be stored.
If any of these information codes is output, replace the defective part inside the HV transaxle.

± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±283
2001 PRIUS (RM778U)
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the motor inverter current sensor. It detects the malfunction of the
sensor system, not of the high voltage system.
DTC P3125 ± Information code 306, 307
INF. Code.Detecting ConditionTrouble Area
306Failure in monitoring motor torque performanceCt&it bl307Abnormal current value of motor
Converter & inverter assembly
INSPECTION PROCEDURE
If the information code 306 or 307 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 306 or 307 alone is recorded, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
If the HV ECU detects the collision signal from the airbag or inverter, the HV ECU recognizes it as the destruc-
tion of the vehicle and then shuts down the high voltage system to ensure safety.
DTC P3125 ± Information code 308
INF. Code.Detecting ConditionTrouble Area
308Input of collision signal from airbag or inverter±
HINT:
When the vehicle collision occurs and the airbag is deployed, this information code will be recorded and the
high voltage system will be shut down.

± 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.

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

BR3795F10178
F10452
Front
Rear OK
NG OKNG
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±375
2001 PRIUS (RM778U)
3 Check for open and short circuit in harness and connector between each speed
sensor and brake ECU (See page IN±41).
NG Repair or replace harness or connector.
OK
4 Check speed sensor installation.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and steering
knuckle or rear axle carrier.
Torque:
Front speed sensor : 8.0 N´m (82 kgf´cm, 71 in.´lbf)
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI±353).
OK

F12396
TOYOTA
Hand±held Tester
DLC3
DI±462
± DIAGNOSTICSELECTRIC MOTOR POWER STEERING
2001 PRIUS (RM778U)
(b) In case of using TOYOTA hand±held tester:
Check the input signal.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Check the warning light goes off with driving more
than 20 km/h (12 mph).
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:

Please refer to the TOYOTA hand±held tester operator's
manual for further details.

See the list of DTC shown on the bottom of this page.

Even a sensor is normal, it output codes 71 and 72 during
test mode.
DTC of input signal check function:
Code No.
(See page)DiagnosisTrouble Area
C1515/15
(DI±468)Calibration of torque sensor zero point Not Performed±
C1516/16
(DI±469)Calibration of torque sensor zero point Not completed±
C1571/71
C1572/72
(DI±474)
Speed sensor malfunction (Test mode)

Right rear or left rear speed sensor

Sensor installation

Right rear or left rear speed sensor rotor

Right rear or left rear speed sensor circuit

Brake ECU

EMPS ECU
3. CALIBRATION OF TORQUE SENSOR ZERO POINT
HINT:
Perform this operation in the following cases.

When removing and installing ºsteering wheelº, ºtilt steer-
ing columnºand ºelectric power steering gearº.

When replacing EMPS ECU.
(a) Place front wheels and steering wheel facing straight
ahead.
(b) In case of using TOYOTA hand±held tester:
Perform the torque sensor zero point initialization.
HINT:
If the EMPS ECU is replaced, however, this operation is not
necessary.
(1) Stop the vehicle.