± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±195
2001 PRIUS (RM778U) MG1 CURRENT W
Electric current of MG1 W phase
MG1 INV TEMP HITemperature of inverter MG1 is high
MG1 REVMG1 revolution
MG1 TEMPMotor temperature of MG1
MG1 TEMP HIGHTemperature fo MG1 is too high
MG2 TEMP HIGHTemperature fo MG2 is too high
MG1 CURRENT VElectric cuurent of MG1 is V phase
MG1 CURRENT WElectric cuurent of MG1 is W phase
MG1 INV TEMP HITemperature of inverter MG1 is higt
MG1 REVMG1 revolution
MG1 TEMPMotor temperature of MG1
MG1 TEMP HIGHTemperature of MG1 is high
MG1 TORQMG1 torque
MG2 CURRENT VElectric cuurent of MG2 is V phase
MG2 CURRENT WElectric cuurent of MG2 is W phase
MG2 INV TEMP HITemperature of inverter MG2 is higt
MG2 REVMG2 revolution
MG2 TEMPMotor temperature of MG2
MG2 TEMP HIGHTemperature of MG2 is high
MG2 TORQMG2 torque
N RANGE OVR TIMELeaving shift gear into N position over a period of time
N RANGE CTRL1N position control due to incomplete shift gears
N RANGE CTRL2N position control due to rapid shift gear (D±R)
OCCURRENCE ORDROrder in which the trouble occurs
OCCURRNCE TRIPNumber of trips when this error occurred
OUTPUT STOPOutput stop
OUTPUT V OVEROutput voltage is too high
OVER CURRENTElectric current of the batytery is too high
OVER VOLTAGEVoltage of the battery is too high
OVR HEAT PRTECTOverheat protection
POWER RQSTPower output requested by HV ECU
PWR RESOURCE IBPower resource IB
PWR RESOURCE VMpower resource VM
RAPID SPD CHANGVehicle speed is changed too rapidly
REGEN EXEC TORQTorque volue of regenerative brake
REGEN IH FACTORInhibiting factor of regeneration
REGEN RQST TORQTorque valueof regenerative brake requested by HV ECU
REGN BRK INEFCTRegenerative brake is ineffective
RESIST OVR HEATRestriction resist is overheating
SG B IN REDUCINShifting gear into ºBº in reducing the speed
SG N IN REDUC/PShifting gear into ºNº reducing the speed
SHIFT BEF READYShifting gear before ºREADYº light turns on
SHIFT POSITIONShift position
SHIFT SENSOR1Shift sensor 1
SHIFT SENSOR2Shift sensor 2
SOCStated of charge
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 to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in the check mode, check the circuit for that code
listed in the table below. For the details of each code, turn to the page referred to under the ''See page'' for
the respective ''DTC No.'' in the DTC chart.
DTC No.
(See page)Detection ItemTrouble Area
Hybrid
System
Warning
Light*
Memory
B2799
(DI±210)Immobilizer MalfunctionWire Harness
Immobilizer System
C2692
(DI±212)Regenerative Brake Check±
C2693
(DI±212)Regenerative Brake Check±X
P1120
(DI±213)Accelerator Pedal Position
Sensor Circuit MalfunctionAccelerator Pedal Position Sensor
Wire Harness
P1520
(DI±215)Stop Light Switch (Cruise Con-
trol System) MalfunctionStop Light Switch
Wire Harness
Brake ECU
X
P1566
(DI±217)Cruise Control System Malfunc-
tionStop Light Switch
Brake ECU
Wire Harness
X
P1600
(DI±219)BATT MalfunctionHV Fuse
Wire Harness
P1780
(DI±221)Park/Neutral Position Switch
System MalfunctionPark/Neutral Position Switch
Wire Harness
P3000
(DI±223)HV Battery Malfunction
HV Battery System
High Voltage Fuse
Power Cable
HV Battery Cooling System
/X
P3001
(DI±224)HV Battery ECU MalfunctionBattery ECU
P3004
(DI±225)Power Cable Malfunction
Power Cable
HV Battery System
Service Plug
System Main Relay
Converter & Inverter Assembly
/X
P3100
(DI±229)HV ECU Malfunction
Wire Harness
HV ECU
ECM
Crankshaft Position Sensor
Camshaft Position Sensor
Ignition Switch
P3101
(DI±237)Engine System MalfunctionEngine
HV Transaxle
P3105
(DI±238)Battery ECU Communication Cir-
cuit MalfunctionWire Harness
Battery ECU
P3106
(DI±240)ECM Communication Circuit
MalfunctionWire Harness
ECM/X
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 Amplifier Communication
Circuit MalfunctionWire Harness
A/C AmplifierX
P3109
(DI±245)Brake ECU Communication Cir-
cuit MalfunctionWire Harness
Brake ECU
P3110
(DI±247)IGCT Relay MalfunctionWire Harness
IGCT Relay
P3115
(DI±249)System Main Relay Malfunction
Wire Harness
System Main Relay
HV ECU
P3120
(DI±252)HV Transaxle Malfunction
HV Transaxle
Wire Harness
System Main Relay
P3125
(DI±266)Converter & Inverter Assembly
MalfunctionConverter & Inverter Assembly
Wire Harness
P3130
(DI±302)Inverter Cooling System Mal-
function
Inverter Water Pump
Wire Harness
IG2 Relay
Electric Cooling Fan System
P3135
(DI±305)Circuit Breaker Sensor Malfunc-
tionCircuit Breaker Sensor
Wire Harness
P3140
(DI±307)Interlock Malfunction
Interlock Switch
Inverter Terminal Cover
Converter & Inverter Assembly
Wire Harness
P3145
(DI±310)Vehicle Speed Sensor Circuit
MalfunctionWire HarnessX
*: : Hybrid system warning light lights up. X: Hybrid system warning light does not light up.
± 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
F12396
TOYOTA
Hand±held Tester
DLC3
F09750
DLC3Tc
Ts
CG
BR3904
0.13 sec. 0.13 sec.
ON
OFF DI±360
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
(g) In case of using TOYOTA hand±held tester:
Clear the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Turn the ignition switch ON.
(3) Operate the TOYOTA hand±held tester to erase the
codes.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
3. SENSOR SIGNAL CHECK (TEST MODE)
HINT:
If the ignition switch is turned from ON to ACC or LOCK during
test mode, DTC will be erased.
(a) In case of not using TOYOTA hand±held tester:
Check the sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and CG of DLC3.
SST 09843±18040
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit and Ts terminal circuit (See page DI±437,
DI±449).
(5) Keep the vehicle in the stationary condition and the
brake pedal in free condition for 1 sec. or more.
(6) Keeping the vehicle in the stationary condition, de-
press the brake pedal with 98 N (10 kgf, 22 lbf) or
more for 1 sec. or more.
(7) Drive vehicle straight forward.
When driving the vehicle at the speed faster than 45
km/h (28 mph) for several seconds, check that the
ABS warning light comes off.
HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its front wheels spun or its steering wheel steered dur-
ing this check.
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
F12396
TOYOTA
Hand±held Tester
DLC3
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±361
2001 PRIUS (RM778U)
(8) Stop the vehicle.
(9) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(10) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(11) After doing the check, turn ignition switch OFF, and
disconnect the SST from terminals Ts and CG, Tc
and CG of DLC3.
SST 09843±18040
(b) In case of using TOYOTA hand±held tester:
Check the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Do step (3) to (8) on the previous page and this
page.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
DI±362
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
DTC of sensor check function:
Code No.DiagnosisTrouble Area
C1271/71Low output voltage of right front speed sensor
Right front speed sensor
Sensor installation
Right front speed sensor rotor
C1272/72Low output voltage of left front speed sensor
Left front speed sensor
Sensor installation
Left front speed sensor rotor
C1273/73Low output voltage of right rear speed sensor
Right rear speed sensor
Sensor installation
Right rear speed sensor rotor
C1274/74Low output voltage of left rear speed sensor
Left rear speed sensor
Sensor installation
Left rear speed sensor rotor
C1275/75Abnormal change in output voltage of right front speed sen-
sorRight front speed sensor rotor
C1276/76Abnormal change in output voltage of left front speed
sensorLeft front speed sensor rotor
C1277/77Abnormal change in output voltage of right rear speed
sensorRight rear speed sensor rotor
C1278/78Abnormal change in output voltage of left rear speed sensorLeft rear speed sensor rotor
C1281/81Master cylinder (M/C) pressure sensor output signals is
faultyMaster cylinder (M/C) pressure sensor
C1282/82Regulator (REG) pressure sensor output signal is faultyRegulator (REG) pressure sensor
C1283/83Front (FR) pressure sensor output signal is faultyFront (FR) pressure sensor
C1284/84Rear (RR) pressure sensor output signal is faultyRear (RR) pressure sensor
DI28U±10
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±363
2001 PRIUS (RM778U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:
Using SST 09843±18040, connect the terminals Tc and CG of DLC3.
If any abnormality is not found when inspecting parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circuit listed that code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC
chart.
DTC No.
(See Page)Detection ItemTrouble Area
C0200/31*1
(DI±366)Right front wheel speed sensor signal malfunction
C0205/32*1
(DI±366)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
Eh d i itC0210/33*1
(DI±366)Right rear wheel speed sensor signal malfunction
Each speed sensor circuit
Sensor rotor
C0215/34*1
(DI±366)Left rear wheel speed sensor signal malfunction
C0226/21
(DI±373)Malfunction in ABS solenoid (SFR) circuitSFRR or SFRH circuit
Brake actuator
C0236/22
(DI±373)Malfunction in ABS solenoid (SFL) circuitSFLR or SFLH circuit
Brake actuator
C0246/23
(DI±373)Malfunction in ABS solenoid (SR) circuitSRR or SRH circuit
Brake actuator
C0278/11
(DI±376)Open circuit in ABS solenoid relay circuitABS solenoid relay
C0279/12
(DI±376)Short circuit in ABS solenoid relay circuit
ABS solenoid relay
ABS solenoid relay circuit
C1202/58
(DI±380)Brake fluid level low
Open circuit in brake fluid level warning switch circuitBrake fluid level
Brake fluid level warning switch
Brake fluid level warning switch circuit
C1211/61
(DI±382)Malfunction in linear solenoid (SLA) circuitSLA+ or SLA± circuit
Brake actuator
C1212/62
(DI±382)Malfunction in linear solenoid (SLR) circuitSLR+ or SLR± circuit
Brake actuator
C1213/63
(DI±384)Malfunction in HV ECU communication circuit
HVI+ or HVI± circuit
HVO+ or HVO± circuit
HV ECU
C1214/64
(DI±386)Malfunction in hydraulic system
Each pressure sensor
Each pressure sensor circuit
Fluid leakage
C1215/15
(DI±387)Low positive voltage of linear solenoidBattery
Ch i tC1216/16
(DI±387)High positive voltage of linear solenoid
Charging system
Power source circuit
C1217/25
(DI±373)Malfunction in regenerative solenoid (SMC1) circuitRegenerative solenoid (SMC1) circuit
Brake actuator
C1218/26
(DI±373)Malfunction in regenerative solenoid (SMC2) circuitRegenerative solenoid (SMC2) circuit
Brake actuator