2001 TOYOTA PRIUS light

A14089
B12009
F12396
DLC3
TOYOTA Hand±held Tester
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±179
2001 PRIUS (RM778U)
(b) Check the master warning light.
(1) Turn the ignition switch ON and confirm that the
master warning light comes on.
HINT:
If the master warning light does not come on, suspect a burnt
fuse, burnt bulb, or open in wiring harness.
(2) When the ºREADYº light is ON, the master warning
light should go off.
If the lamp remains on, the diagnosis system has detected a
malfunction in the system or the meassage such as ºWhen you
park your care, make sure you shift to Park P.º and ºThe batter-
ies will not charge if the shifter is Nº appears on the multi±in-
formation display.
Since DTC may be stored even though the lamp is OFF, be sure
to check DTC.
(c) Check the DTC.
(1) Prepare a TOYOTA hand±held tester.
(2) Connect the TOYOTA hand±held tester to the
DLC3.
(3) Turn the ignition switch ON and push the TOYOTA
hand±held tester main switch ON.
(4) Use the TOYOTA hand±held tester to check the
DTC, information code and freeze frame data and
note them down. (For operating instructions, see
the TOYOTA hand±held tester operator's manual).
HINT:

For one DTC, the HV diagnosis system can memorize
more than one information code and freeze frame data
corresponding to them. Therefore, when troubleshooting,
check all of the information codes, record the freeze
frame data and then start inspection according to the pro-
cedures of ºCircuit Inspectionº.

The HV ECU is communicating with each ECU of the en-
gine brake, HV battery and EMPS. So, if a warning is out-
put from the HV control system, check and record DTCs
of all ECUs. (See tables on the following pages.)
(5) See a related page to confirm details of the DTC.

F12396
TOYOTA hand±held tester
DLC3
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±187
2001 PRIUS (RM778U)
(d) Clear the DTC after completion of repair.
(1) Connect the TOYOTA hand±held tester to the
DLC3.
Before clearing, check that DTCs and freeze frame
data of the HV ECU and the ECU related to the op-
eration history data are reccorded.
(2) Operate the TOYOTA hand±held tester to erase the
DTC (See the hand±held tester operator's manu-
al.).
4. FAIL±SAFE CHART
If any the following codes is recorded, the HV ECU enters the fail safe mode.
DTC codeINF. codeTrouble areaDriving condition
B2799101Immobilizeer MalfunctionImpossible to drive
C2692102Regenerative Brake Check±
C2693103Regenerative Brake Check±
104Limited driving
105Limited driving
106Limited driving
107Limited driving
108Limited driving
P1120109Accelerator Pedal Position
Sensor Circuit MalfunctionLimited drivingP1120
11 0Sensor Circuit MalfunctionLimited driving
111Limited driving
11 2Limited driving
11 3Limited driving (Creep vehicle speed)
11 4Limited driving (Creep vehicle speed)
P152011 5Stop Light Switch MalfunctionCruise control driving impossible
P156611 6Cruise Control System Mal-
functionCruise control driving impossible
P160011 7BATT MalfunctionNormal driving
11 8Impossible to drive/Normal driving when shift position is fixed
P178011 9Park/Neutral Positiont SwitchImpossible to drive/Normal driving when shift position is fixedP1780120
Park/Neutral Positiont Switch
System MalfunctionImpossible to drive
121
y
Impossible to drive/Normal driving when shift position is fixed
123Limited driving
P3000125HV B tt M lf tiLimited drivingP3000388HV Battery MalfunctionLimited driving
389Limited driving
P3001129HV Battery ECU MalfunctionLimited driving
130Limited driving
P3004131PCblMlftiImpossible to driveP3004132Power Cable MalfunctionNormal driving
133Limited driving

± 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 Malfunction
Wire Harness

Immobilizer System
C2692
(DI±212)Regenerative Brake Check±
C2693
(DI±212)Regenerative Brake Check±X
P1120
(DI±213)Accelerator Pedal Position
Sensor Circuit Malfunction
Accelerator Pedal Position Sensor

Wire Harness
P1520
(DI±215)Stop Light Switch (Cruise Con-
trol System) Malfunction
Stop Light Switch

Wire Harness

Brake ECU
X
P1566
(DI±217)Cruise Control System Malfunc-
tion
Stop Light Switch

Brake ECU

Wire Harness
X
P1600
(DI±219)BATT Malfunction
HV Fuse

Wire Harness
P1780
(DI±221)Park/Neutral Position Switch
System Malfunction
Park/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 Malfunction
Battery 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 Malfunction
Engine

HV Transaxle
P3105
(DI±238)Battery ECU Communication Cir-
cuit Malfunction
Wire Harness

Battery ECU
P3106
(DI±240)ECM Communication Circuit
Malfunction
Wire Harness

ECM/X

DI±198
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)P3107
(DI±242)
Airbag ECU Communication Cir-
cuit Malfunction
Wire Harness

Airbag Sensor Assembly
P3108
(DI±244)A/C Amplifier Communication
Circuit Malfunction
Wire Harness

A/C AmplifierX
P3109
(DI±245)Brake ECU Communication Cir-
cuit Malfunction
Wire Harness

Brake ECU
P3110
(DI±247)IGCT Relay Malfunction
Wire 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
Malfunction
Converter & 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-
tion
Circuit 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
Malfunction
Wire 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

DI82N±02
A02508A04997
HV ECU Terminals
H12 H13 H14H11H10
1 2 4 5 6 7 8 93
10 11 12 13 14 1615 19 20 1718 21
22 23 24 25 26 27 28 29 30 311 2 4 5 63 7
8 9 10 11 12 13 14 16 15
19 20 1718 21 22 23 241 2 4 5 63
7 8 9 10 11 12
14 13 15 16 171 2 3 4 65 7 8 9
10 11 12 13 14 16 15 19 1718
20 21 22 25 26 27 28 23241 2 3 4 5 6 7
8 9 10 11 12 13 14 15
17 18 16 19 20 21 22
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
DI±207
2001 PRIUS (RM778U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
BATT (H14±3) e GND1
(H14±31)G±Y eW±BAlways9 ± 14
+B1 (H14±4) e GND1
(H14±31)W±G e W±BIgnition switch ON and ºREADYº light ON9 ± 14
+B2 (H14±5) e GND1
(H14±31)W±G e W±BIgnition switch ON and ºREADYº light ON9 ± 14
IGSW (H13±7) e GND1
(H14±31)B±W e W±BIgnition switch ON9 ± 14
ST2 (H13±6) e GND1
(H14±31)R±W e W±BIgnition switch ST9 ± 14
ST1 (H14±2) e GND1BYWBBrake pedal is depressedBelow 0.5ST1 (H14 2) e GND1
(H14±31)B±Y e W±BBrake pedal is released9 ± 14
STP (H14±1) e GND1GWWBBrake pedal is depressed9 ± 14STP (H14 1) e GND1
(H14±31)G±W e W±BBrake pedal is releasedBelow 0.5
VCP1 (H14±13) e GND1
(H14±31)Y e W±BIgnition switch ONApprox. 5
VPA1 (H14±14) e GND1GWBIgnition switch ON and accelerator pedal is releasedApprox. 1VPA1 (H14 14) e GND1
(H14±31)G eW±BIgnition switch ON and accelerator pedal is fully depressedApprox. 4
EP1 (H14±12) e GND1
(H14±31)L e W±BIgnition switch ONBelow 0.5
VCP2 (H14±23) e GND1
(H14±31)B e W±BIgnition switch ONApprox. 5
VPA2 (H14±15) e GND1WWBIgnition switch ON and accelerator pedal is releasedApprox. 1VPA2 (H14 15) e GND1
(H14±31)W eW±BIgnition switch ON and accelerator pedal is fully depressedApprox. 4
EP2 (H14±22) e GND1
(H14±31)R e W±BIgnition switch ONBelow 0.5
P (H13 15)GND1 (H14 31)LRWBShift lever is P positionBelow 1P (H13±15) e GND1 (H14±31)L±R eW±BExcept shift lever is P position4 or more
R (H13 14)GND1 (H14 31)RBWBShift lever is R positionBelow 1R (H13±14) e GND1 (H14±31)R±B eW±BExcept shift lever is R position4 or more
N (H13 13)GND1 (H14 31)LWWBShift lever is N positionBelow 1N (H13±13) e GND1 (H14±31)L±W eW±BExcept shift lever is N position4 or more
D (H13 23)GND1 (H14 31)LBWBShift lever is D positionBelow 1D (H13±23) e GND1 (H14±31)L±B eW±BExcept shift lever is D position4 or more
B (H13 22)GND1 (H14 31)LG RWBShift lever is B positionBelow 1B (H13±22) e GND1 (H14±31)LG±R eW±BExcept shift lever is B position4 or more

DI±208
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)
Shift lever is P positionApprox. 0.5
Shift lever is R positionApprox. 2.8SFT (H13±11) e GSFT
(H13 21)B±RShift lever is N positionApprox. 3.4(H13±21)BR
Shift lever is D positionApprox. 4.0
Shift lever is B positionApprox. 4.5
VSFT (H13±12) e GSFT
(H13±21)W±RIgnition switch ON4 or more
SPDI (H12±8) e GND1
(H14±31)V±W e W±BIgnition switch ON and rotor driving wheel slowlyPulse generation
ESTP (H14±8) e GND1RYWBEngine stop is not required9 ± 14ESTP (H14 8) e GND1
(H14±31)R±Y eW±BEngine stop is requiredBelow 1
SPDO (H14±6) e GND1
(H14±31)O e W±BIgnition switch ON and rotor driving wheel slowlyPulse generation
When converter is in normal operation5 ± 7NODD (H12±4) e GND1
(H14 31)L±O e W±BWhen converter is improper2 ± 4(H14±31)LO e WB
When converter is required to stop0.1 ± 0.5
ILK (H13±4) e GND1OWBIgnition switch ON and interlock switch ONBelow 1ILK (H13 4) e GND1
(H14±31)O eW±BIgnition switch ON and interlock switch OFF4 or more
AS1G (H12±14) e AS1
(H12±15)BR±B e G±RIgnition switch ON2.5 ± 2.9
IB (H14 25)GB (H14 26)BLRWIgnition switch OFFBelow 1IB (H14±25) e GB (H14±26)B±L eR±WIgnition switch from ON to ST (ºREADYº light ON)0.5 ± 4.5
ABFS (H13±3) e GND1
(H14±31)L eW±BIgnition switch ON and ºREADYº light ON2.7 ± 3.2
MREL (H12±7) e GND1
(H14±31)O eW±BIgnition switch ON9 ± 14
Communication Line
Symbols (Terminals No.)Wiring ColorConnecting Part or Symbol (Terminal No.)
GSNG (H10±11)GMG1, GSNG (M2±7)
GSN (H10±4)RMG1, GSN (M2±2)
GRF (H10±10)BMG1, GRF (M2±1)
GRFG (H10±17)WMG1, GRFG (M2±6)
GCS (H10±5)YMG1, GCS (M2±3)
GCSG (H10±12)BRMG1, GCSG (M2±8)
GMTG (H10±8)G±WMG1, GMTG (M2±9)
GMT (H10±1)B±RMG1, GMT (M2±4)
MSNG (H10±20)GMG2, MSNG (M3±5)
MSN (H10±13)RMG2, MSN (M3±2)
MRF (H10±19)PMG2, MRF (M3±1)
MRFG (H10±18)LMG2, MRFG (M3±4)
MCS (H10±14)BMG2, MCS (M3±3)
MCSG (H10±21)WMG2, MCSG (M3±6)
MMTG (H10±9)R±WMG2, MMTG (M4±3)
MMT (H10±2)GRMG2, MMT (M3±1)
MSIV (H11±21)GInverter, M±SINV (I10±7)
MSDN (H11±13)YInverter, M±SDOWN (I9±4)
MIT (H11±11)LInverter, M±INVT (I9±5)