2001 TOYOTA PRIUS change time

± 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

± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±341
2001 PRIUS (RM778U) 4/27/01
DTC P3011±P3029 Battery Block # Malfunction
CIRCUIT DESCRIPTION
Internal resistance of each battery module is measured, detecting battery deterioration for each block, 1 to
19. Nineteen blocks of battery modules are arranged in the order of 1 to 19 from the ECU side.
DTC No.DTC Detecting ConditionTrouble Area
P3011±P3029Battery internal resistance is abnormal.
Battery ECU

Battery pack
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P3011±P3029) being outputs?
YES Go to relevant DTC chart.
NO
2 Check that the block voltage during charging/ discharging.
PREPARATION:
(a) To ensure safety, conduct this test in a wide, clear level area which provides good traction.
(b) Turn ON the ºREADYº light.
(c) Warm up the engine and turn off the A/C switch.
(d) Fully apply the parking brake and chock the 4 wheels.
(e) Connect a TOYOTA hand±held tester to DLC3 and select HV BATTERY and then CURRENT DATA.
(f) Show voltage of the block corresponding to the DTC and other block (any block except the above±
mentioned block).
CHECK:
(a) Keep your left foot pressed firmly on the brake pedal and shift into the R position.
(b) Confirm the engine stopped in the R position. Step on the accelerator pedal until the engine starts,
stepping on the brake pedal firmly.
(c) Release the accelerator pedal when the engine starts. At the same time, monitor the change of the
voltage before engine starting (during discharging) and after engine starting (during charging).
DI82C±01

DI7OK±01
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
±VHigh Speed
Low Speed
CoilNS
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±371
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
DTC
C0200/31 ± C0215/34Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used for control
of both the ABS & EBD control system. The front and rear rotors
each have 48 serrations.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.

DTC No.DTC Detecting ConditionTrouble Area
C0200/31
C0205/32
C0210/33
C0215/34
Detection of any of conditions 1. through 4.:
1. At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 15 sec. or more.
2. While a vehicle is driven at a speed of 15 km/h (24 mph)
or more, pulse signals from the speed sensor are
instantly omitted 7 times or more.
3. While a vehicle is driven at a speed of 20 km/h (32 mph)
or more, error signals from the speed sensor are trans-
mitted consecutively 75 time or more within 5 min.
4. When the ignition switch is ON, an open circuit in the
speed sensor continues for 0.5 sec. or more.

Right front, left front, right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor
HINT:
DTC No. C0200/31 is for the right front speed sensor.
DTC No. C0205/32 is for the left front speed sensor.
DTC No. C0210/33 is for the right rear speed sensor.
DTC No. C0215/34 is for the left rear speed sensor.

F12681
Brake ECU
B2
2 6
AA 1
1 ABS
No. 2
Engine Room J/B22
2 2
22
14
22
Y 1
3 FL
Block No. 12
2
J1
J/CL±O
5IA2
LG±R
13R1+
R2+ Y±B
W±L F12
IE2 G±W W±L
Battery 1B
6
H6 H6
B±G 1K
Hydraulic Brake
Booster7
W±BY±G14
3Y±G
MR2MR1
MTT
MT+
MT± 29
27
28
18 ABS
No. 3
FL
Block No. 2B
1K
F13H5
H6
H5
H5
H5
W±B W±B
AAY±B
B11
B13
B10
B13
B10
B10
B10
J7
J/CEngine
Room
R/B No. 2 Hydro
Motor
Relay
No. 2 Hydro
Motor
Relay
No. 1 1
23
43
4 2 1
G
MAIN
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±411
2001 PRIUS (RM778U)
DTC C1251/51 Hydraulic Brake Booster Pump Motor
Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1251/51
Either of the following 1. or 2. is detected:
1. After turning the ignition switch ON, the current of more
than 28A flows to the motor for more than 1 sec.
2. After turning the ignition switch ON, less than 7A
change in current is detected more than 3 times in a row
when the motor is ON.
Hydraulic brake booster pump motor
WIRING DIAGRAM
DI298±06

F12682
High Pressure
Switch
H5
H6 Hydraulic Brake Booster
W±B W±B W±B 5
A 1
IE GR
J1
J/C Y±R 4
49 B1011Brake ECU
PL PH
B13 H5
H6J7
J/C
A A PL PH
PLG PHG
Low Pressure
SwitchW±B
DI±430
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check accumulator operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal 40 times or more.
HINT:
When a pressure in power supply system is released, reaction force becomes heavy and stroke becomes
shorter.
(b) Install the LSPV gauge (SST) to rear wheel cylinder and bleed air.
SST 09709±29018
CHECK:
Depress the brake pedal with force of more than 343 N (35 kgf, 77 lbf) and turn the ignition switch ON, then
check the rear wheel cylinder pressure when an increase of pressure changes from acutely to mildly.
OK:
5,099 ± 8,924 kPa (52 ± 91 kgf/cm2, 740 ± 1,294 psi) at 20°C (68°F)
HINT:
If the value is not within the standard, cool the engine room and check it again.
NG Replace accumulator.
OK

F12410
LOCK ONPH
PHG
F12413
LOCKPHPHG
DI±432
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
3 Check pressure switch (PH) operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal
40 times or more.
HINT:
When a pressure in power supply system is released, reaction
force becomes heavy and stroke becomes shorter.
(b) Install the LSPV gauge (SST) to the rear wheel cylinder
and bleed air.
SST 09709±29018
CHECK:
While checking the voltage between terminals PH and PHG of
hydraulic brake booster, depress the brake pedal with force of
more than 343 N (35 kgf, 77 lbf) and turn the ignition switch ON,
then check the rear wheel cylinder pressure when voltage
changes from 6 V to 0 V.
OK:
12,553 ± 20,104 kpa (128 ± 205 kgf´cm2, 1,820 ± 2,916
psi)
CHECK:
While checking the resistance between terminals PH and PHG,
depress the brake pedal changing the force in the range of 197
N (20 kgf, 44 lbf) to 343 N (35 kgf, 77 lbf) and check the rear
wheel cylinder pressure when resistance changes from 0 kW to
1 kW between PH and PHG.
OK:
11,964 ± 18,240 kpa (122 ± 186 kgf´cm2, 1,735 ± 2,645
psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI±353).
OK Go to step 5.
NG

F12411
LOCKON
PLG PL
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±433
2001 PRIUS (RM778U)
4 Check for open circuit in harness and connector between pressure switch (PH)
and brake ECU (See page IN±41).
NG Repair or replace harness or connector.
OK
Replace hydraulic brake booster assembly.
5 Check pressure switch (PL) operation.
PREPARATION:
(a) Turn the motor switch OFF, and depress the brake pedal
40 times or more.
HINT:
When a pressure in power supply system is released, reaction
force becomes heavy and stroke becomes shorter.
(b) Install the LSPV gauge (SST) to the rear wheel cylinder
and bleed air.
SST 09709 ±29018
CHECK:
While checking the resistance between terminals PL and PLG
of hydraulic brake booster, depress the brake pedal with force
of more than 343 N (35 kgf, 77 lbf) and turn the ignition switch
ON, then check the rear wheel cylinder pressure when the re-
sistance changes from 5.7 kW to 1.0 kW.
OK:
9,022 ± 15,102 kpa (92 ± 154 kgf´cm2, 1,308 ± 2,190 psi)
CHECK:
While checking the resistance between terminals PL and PLG
of hydraulic brake booster, depress the brake pedal changing
the force in the range of 197 N (20 kgf, 44 lbf) to 343 N (35 kgf,
77 lbf) and check the rear wheel cylinder pressure when resis-
tance changes from 1.0 kW to 5.7 kW.
OK:
8,532 ± 13,337 kpa (87 ± 136 kgf´cm2, 1,237 ± 1,934 psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI±353).
NG Replace hydraulic brake booster assembly.
OK

I17096
Navigation Check
screen switch
Time data
Position data
Measurement Status Satellite
Information
DI±804
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
(b) GPS INFORMATION MODE SCREEN
(1) This screen displays GPS related data.
HINT:
Data are updated every 1 sec.
(2) Satellite Information
The angle of elevation of relevant satellite, azimuth signal level, and receiving condition of sig-
nals are displayed.
HINT:
The reception status shows receiving.
ºTº: means in operation but measurement is not being used for positioning.
ºPº: means measurement is being used for positioning.
º±º: means no data can be received.
Display area for up to 8 satellites is ensured.
Data shall be updated corresponding to change of information.
(3) Time data: The time data obtained from a GPS receiver is displayed in month, day, year, hour
and minute.
(4) The displayed time is Greenwich Mean Time.
(5) Position Data: The latitude and longitude of the current location are displayed in degree and min-
ute.
(6) Measurement Status is displayed in the following 5 items.
2D: 2 dimensions.
3D: 3 dimensions.
NG: GPS information cannot be used.
error: Receiving error occurs.
±: Other than the above.
(7) Navigation Check Screen Switch
Pressing this switch activates the Navigation Check screen.