2001 TOYOTA PRIUS brake sensor

IN±32± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
2001 PRIUS (RM778U)
2. SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE CHECK
The diagnostic system in the PRIUS fulfills various functions. The first function is the Diagnostic Trouble
Code Check in which a malfunction in the signal circuits to the ECU is stored in code in the ECU memory
at the time of occurrence, to be output by the technician during troubleshooting. Another function is the Input
Signal Check which checks if the signals from various switches are sent to the ECU correctly.
By using these check functions, the problem areas can be narrowed down quickly and troubleshooting can
be performed effectively. Diagnostic functions are incorporated in the following systems in the PRIUS.
SystemDiagnostic Trouble
Code CheckInput Signal Check
(Sensor Check)Diagnostic Test
Mode (Active Test)
Engine (with Check
Mode)
Hybrid Vehicle Control System
HV Battery Control System (with Check
Mode)
Anti±Lock Brake System With EBD & RBS
Electric Motor Power Steering
Supplemental Restraint System
Cruise Control System
Multiplex Communication System
Navigation System
Air Conditioning System

IN04Q±11
IN±46
± INTRODUCTIONTERMS
46 Author: Date:
2001 PRIUS (RM778U)
TERMS
ABBREVIATIONS USED IN THIS MANUAL
AbbreviationsMeaning
ABSAnti±Lock Brake System
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir±Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
APPROX.Approximately
A/TAutomatic Transmission (Transaxle)
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi±Level
B/SBore±Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching Valve
Calif.California
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve

± INTRODUCTIONTERMS
IN±49
49 Author: Date:
2001 PRIUS (RM778U) N
Neutral
NANatural Aspiration
No.Number
O/DOverdrive
OEMOriginal Equipment Manufacturing
OHCOverhead Camshaft
OHVOverhead Valve
OPTOption
O/SOversize
P & BVProportioning And Bypass Valve
PCSPower Control System
PCVPositive Crankcase Ventilation
PKBParking Brake
PPSProgressive Power Steering
PSPower Steering
PTOPower Take±Off
R & PRack And Pinion
R/BRelay Block
RBSRecirculating Ball Type Steering
R/FReinforcement
RFSRigid Front Suspension
RHRight±Hand
RHDRight±Hand Drive
RLYRelay
ROMRead Only Memory
RrRear
RRRear±Engine Rear±Wheel Drive
RRSRigid Rear Suspension
RWDRear±Wheel Drive
SDNSedan
SENSensor
SICSStarting Injection Control System
SOCState Of Charge
SOHCSingle Overhead Camshaft
SPECSpecification
SPISingle Point Injection
SRSSupplemental Restraint System
SSMSpecial Service Materials
SSTSpecial Service Tools
STDStandard
STJCold±Start Fuel Injection
SWSwitch
SYSSystem
T/ATransaxle
TACHTachometer
TBIThrottle Body Electronic Fuel Injection

SS04X±12
± SERVICE SPECIFICATIONSSUSPENSION AND AXLE
SS±27
2001 PRIUS (RM778U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
FRONT AXLE
Hub nut1031,05076
Tie rod end lock nut7475055
Steering knuckle x Shock absorber1531,56011 3
Steering knuckle x Brake caliper1071,09079
Steering knuckle x Tie rod end4950036
Axle hub x Drive shaft2162,200159
Lower ball joint x Lower suspension arm1421,450105
Lower ball joint x Steering knuckle1031,05076
Steering knuckle x Dust cover8.38574 in.´lbf
ABS speed sensor set bolt8.08271 in.´lbf
FRONT SUSPENSION
Suspension support x Body3940029
Suspension support x Piston rod4747534
Flexible hose x Shock absorber2930022
ABS speed sensor wire harness x Shock absorber5.45548 in.´lbf
Lower suspension arm set bolt1371,397101
Suspension member set bolt Front side
Rear side11 3
1571,152
1,60083
11 6
Torque rod x Suspension member1001,03074
Stabilizer bar bracket x Suspension member1919414
Stabilizer bar link set nut7475555
REAR AXLE
Hub nut1031,05076
Axle hub set bolt5252538
REAR SUSPENSION
Shock absorber x Axle Beam8081659
ABS speed sensor wire harness x Axle Beam5.45548 in.´lbf
Spring bracket x Body8081659
Shock absorber center nut5657141
Parking brake cable set bolt5.45548 in.´lbf
Toe control link x Body9091866
Toe control link x Axle beam9091866
Stabilizer bar set bolt1491,51911 0

SS0LN±06
± SERVICE SPECIFICATIONSBRAKE
SS±29
2001 PRIUS (RM778U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
BRAKE PEDAL
Pedal bracket x Reinforcement1414310
Brake pedal x Pedal bracket3737527
PARKING BRAKE PEDAL
Pedal bracket x Reinforcement1414310
Pedal bracket x Body131309
Brake pedal x Pedal bracket3232724
BRAKE MASTER CYLINDER
Master cylinder x Pedal bracket131309
Master cylinder clevis lock nut2626519
HYDRAULIC BRAKE BOOSTER
Hydraulic brake booster assembly x Body1919414
Sub±bracket x Body1919414
Reservoir bracket x Body1818413
Reservoir x Bracket7.57766 in.´lbf
Accumulator x Booster pump5455036
Pressure switch assembly x Brake power supply bracket7.88069 in.´lbf
Booster pump x Brake booster pump bracket No. 27.88069 in.´lbf
Pressure switch assembly x Brake booster pump bracket No. 17.88069 in.´lbf
Connector bracket x Pressure switch assembly7.88069 in.´lbf
Pressure switch assembly x Brake booster pump bracket No. 27.88069 in.´lbf
FRONT BRAKE
Front disc brake caliper installation bolt3435025
Bleeder plug8.38574 in.´lbf
Front disc brake caliper x Flexible hose3031022
Front disc brake torque plate x Steering knuckle1071,09079
REAR BRAKE
Bleeder plug8.58775 in.´lbf
Rear drum brake wheel cylinder x Backing plate101007
BRAKE ACTUATOR
Brake actuator assembly x Body1919514
Brake actuator x Actuator bracket111208
SPEED SENSOR
Front speed sensor installation bolt8.08271 in.´lbf
Front speed sensor harness clamp bolt5.55649 in.´lbf
Rear speed sensor harness clamp bolt5.55649 in.´lbf
BRAKE LINE
Brake line union nut1515511

HV ECU±DTC & Information #
INFORMATION 1
INFORMATION 2
INFORMATION 3
INFORMATION 4
INFORMATION 5
INFORMATION 1
INFORMATION 2
INFORMATION 3
INFORMATION 4
INFORMATION 5
INFORMATION 1
INFORMATION 2
INFORMATION 3
INFORMATION 4
INFORMATION 5
INFORMATION 1
INFORMATION 2
INFORMATION 3
INFORMATION 4
INFORMATION 5
HV ECU±Information & Freezed frame data
MG1 REV
MG2 REV
MG1 TORQ
MG2 TORQ
POWER RQST
ENGINE SPD
MCYL CTRL POWER
SOC
WOUT CTRL POWER
WIN CTRL POWER
DRIVE CONDITION
INVERT TEMP ± MG1
INVERT TEMP ± MG2
MG1 TEMP
MG2 TEMP
PWR RESOURCE VM
PWR RESOURCE IB
SHIFT SENSOR 1
ACC SENSOR MAIN
ENG STOP RQST
IDLING REQUEST
ENGINE FUEL CUTrpm
rpm
rpm N´m
NmW
W
W%
( °C)
V
V A
Yes / No
Yes / No
Yes / NoHV BATT CH RQST
HCAC ABSRT RQST
ENG WARM UP RQT
STOP SW COND
CRUISE CONTROL
AUX. BATT V
EXCLUSIVE INFO1
EXCLUSIVE INFO2
EXCLUSIVE INFO3
EXCLUSIVE INFO4
EXCLUSIVE INFO5
EXCLUSIVE INFO6
LOAD CONDITION
DRIVING PATTEN1
DRIVING PATTEN2
DRIVING PATTEN3
IG OFF IN DRVIN
SG B IN REDUCIN
SG N IN REDUC/P
STEP ACC&BRAKE
IG OFF TIME
OCCURRENCE ORDERV Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No MG1 / MG2
min
± DTC
DTC
DTC
DTC
N´m
INFORMATION
°F
( °C) °F
( °C) °F
( °C) °F DI±180
± DIAGNOSTICSHYBRID VEHICLE CONTROL SYSTEM
2001 PRIUS (RM778U)

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±193
2001 PRIUS (RM778U)
5. CHECK FOR INTERMITTENT PROBLEMS
(a) Perform a simulation test (See page IN±41).
In the simulation test, reproduce the driving condition at the trouble occurrence according to the cus-
tomer 's comments and freeze frame data recorded with DTC, such as an opening angle of the acceler-
ator pedal, SOC, engine coolant temperature, engine rpm, and MG/1MG2 rpm and torque.
(b) Check the connector and terminal (See page IN±41).
(c) Handle the connector (See page IN±41).
6. TOYOTA HAND±HELD TESTER DISPLAY ITEMS
TOYOTA Hand±held tester displayMeasurement Item
1 BEF LATST ORNumber of operation of 1 trip before last
1 BEF LATST TRPNumber of trips before last
2 BEF LATST ORNumber of operation 2 trips before last
2 BEF LATST TRPNumber of trips 2 before last
ABNML CON BR±HVCommunication malfunction between HV ECU and brake
ACC SENSOR MAINMain accelerator sensor
ACC SENSOR SUBSub accelerator sensor
ACC TENT TRBLETentative trouble of accelerator
ACC THROTTLEAccelerator throttle
ACCEL MODEHistory of acceleration and reduction
AIR CON REQUESTAir conditioner request
AUX. BATT LOWAuxiliary battery becomes week
AUX. BATT VVoltage of auxiliary battery
BATT HIGH TEMPTemperature of the battery is too high
BATT HIGH VOLTVoltage of the battery is too high
BATT LOW BOLTVoltage of the battery is low
BATT OVER LOADBattery is overloaded
BATT SAVE RQSTRequest to save the main battery
BATTERY FULLBattery full
BRAKE TORQBrake torque
CELL TEMP±MAXHighest temperature of all battery cells
CELL TEMP±MINLowest temperature of all battery cells
CHG RESTRICTIONCharge restriction
COOLANT TEMPWater temperature
CRUISE CONTROLCondition of the cruise control
DC/DC CONV STOPDC/DC converter stop signal
DC/DC CONV STOPFactors causing DC/DC converter to stop
DC/DC STOP FACTDC/DC converter has stopped at least once
DC/DC V UNSETDC/DC voltage is unsettled
DCHG RQST SOCDischarge request to adjust SOC
DISCHAG INHIBITBattery is inhibited to discharge