2001 TOYOTA PRIUS battery

B12009
± HYBRID VEHICLE CONTROLCONVERTER AND INVERTER ASSEMBLY
HV±15
1345 Author: Date:
2001 PRIUS (RM778U)
2. INSPECT CONVERTER
(a) Function check
Measure the voltage of an auxiliary battery terminal when
the ºREADYº lamp is OFF and ON.
READY lamp is OFF: Approx. 12 V
READY lamp is ON: Approx. 14 V
(b) Output current check
(1) Disconnect the MG2 power cable from the inverter
(See page HV±18).
(2) Install AC/DC 400 A probe to the wire harness of the
IP connector of the converter.
(3) Connect the MG2 power cable to the inverter (See
page HV±22).
(4) With the READY lamp ON, operate electric devices
one by one and measure the output current.
Standard: 100 A or less
HINT:
If more than 100 A is shown momentarily, check for the follow-
ings.

Ground short of electric device.

Overload caused by installation of excessive device.

PTC heater operation.

HV00A±01
B11977
B11979
B11980
HV±18
± HYBRID VEHICLE CONTROLCONVERTER AND INVERTER ASSEMBLY
2001 PRIUS (RM778U)
REMOVAL
1. REMOVE SERVICE PLUG (See page HV±1)
2. DRAIN HV COOLANT (See page HT±6)
3. REMOVE COWL TOP PANEL (See page BO±31)
4. VERIFY 0 V
NOTICE:

Before starting step (a), 5 minutes or more should be
passed after removing the service plug.

Be careful to prevent foreign matter from entering the
inside of connector cover.
(a) Disconnect the connector of the battery power cable and
insulate it with packaging tape.
(b) Using a torx socket wrench (T30), remove the 4 screws
and inverter terminal cover.
(c) Using a torx socket wrench (T40), remove the 2 screws,
circuit breaker sensor and connector cover.
HINT:
Slide the connector cover to disconnect the circuit breaker sen-
sor connector.
(d) Using a voltmeter, measure the voltage between termi-
nals of 3 phases (U±V, V±W, U±W) and each terminal and
body ground to verify them to be approx. 0 V.
5. REMOVE CONVERTER & INVERTER ASSEMBLY
(a) Remove the 6 bolts and 3 power cables for MG2.
NOTICE:
Be careful to prevent foreign matter from entering the in-
side of connector cover.
(b) Remove the 3 bolts and power cable for MG1.
NOTICE:

Remove the power cable for MG1 together with con-
verter & inverter assembly.

Be careful to prevent foreign matter from entering the
inside of connector cover.
(c) Remove the bolt and ground cable.

± HYBRID VEHICLE CONTROLCONVERTER AND INVERTER ASSEMBLY
HV±23
2001 PRIUS (RM778U)
5. OPERATION AFTER REPLACING CONVERTER & IN-
VERTER ASSEMBLY
Even if the master warning light is not lit, clear DTC using a
TOYOTA hand±held tester. When replacing a converter & in-
verter assembly of the vehicle in which no error occurs, also
clear DTC using a TOYOTA hand held tester.
HINT:
When a TOYOTA hand±held tester cannot be used, disconnect
the auxiliary battery for 1 min. or more and connect it again.
6. CHECKING AFTER REPLACING CONVERTER & IN-
VERTER ASSEMBLY
Depressing the accelerator pedal to a degree of 50 %, increase
the speed up to approx. 15 km/h 3 or 4 times to check that there
is no problem in the inverter operation.

D09785
SLS+
STPACC IGA
E B
P1
P
P2
SLS±KLS+
D09783
D09784
± HYBRID TRANSAXLESHIFT LOCK SYSTEM
HT±55
2001 PRIUS (RM778U)
2. INSPECT SHIFT LOCK CONTROL ECU
Using a voltmeter, measure the voltage at each terminal.
HINT:
Do not disconnect the ECU connector.
TerminalMeasuring ConditionVoltage (V)
A, 1 ± A, 5 (ACC ± E)Ignition switch ACC10 ± 14
A, 3 ± A, 5 (IG ± E)Ignition switch ON10 ± 14
A, 6 ± A, 5 (STP ± E)Depressing brake pedal10 ± 14
A, 4 ± A, 5 (KLS+ ± E)
5. Ignition switch ACC and P position
6. Ignition switch ACC and except P position
7. Ignition switch ACC and except P position (After approx. 1 second)0
7.5 ± 11
6 ± 9.5
B, 1 ± B, 5 (SLS+ ± SLS±)
1. Ignition switch ON and P position
2. Depress brake pedal
3. Except P position0
8 ± 13.5
0
B, 2 ± B, 4 (P1 ± P)1. Ignition switch ON, P position and depress brake pedal
2. Shift except P position under conditions above0
9 ± 13.5
B, 6 ± B, 4 (P2 ± P)1. Ignition switch ACC, P position
2. Shift except P position under conditions above9 ± 13.5
0
3. INSPECT SHIFT LOCK SOLENOID
(a) Disconnect the solenoid connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals.
Standard resistance: 29 ± 35 W
If the resistance value is not as specified, replace the solenoid.
(c) Apply battery positive voltage between terminals. Check
the operation.
If the solenoid does not operate, replace the solenoid noise can
be heard from the solenoid.

I04108
Q07191
D09785
SLS+
STPACC IGA
E B
P1
P
P2
SLS±KLS+
HT±56
± HYBRID TRANSAXLESHIFT LOCK SYSTEM
2001 PRIUS (RM778U)
4. INSPECT KEY INTERLOCK SOLENOID
(a) Disconnect the solenoid connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals 3 and 4.
Standard resistance: 12.5 ± 16.5 W
If the resistance value is not as specified, replace the solenoid.
(c) Apply battery positive voltage between the terminals 3
and 4. Check that an operation sound can be heard from
the solenoid.
If the solenoid does not operate, replace the solenoid.
5. INSPECT SHIFT LOCK CONTROL SWITCH
Check that there is continuity between terminals.
Shift positionTester connectionStandard
P positionA, 5 ± B, 2 (E ± P1)Continuity
P position
(Pull the shift lever toward
you)A, 5 ± B, 2 (E ± P1)
A, 5 ± B, 6 (E ± P2)Continuity
R, N, D, 2, L positionA, 5 ± B, 6 (E ± P2)Continuity
If continuity is not identified, replace the switch.

RS0JO±06
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±1
1600 Author: Date:
2001 PRIUS (RM778U)
SRS AIRBAG
PRECAUTION
CAUTION:

The PRIUS is equipped with SRS, which comprises a driver airbag, front passenger airbag and
side airbag. Failure to carry out service operations in the correct sequence could cause the SRS
to unexpectedly deploy during servicing, possibly leading to a serious accident. Further, if a
mistake is made in servicing the SRS, it is possible that the SRS may fail to operate when re-
quired. Before performing servicing (including removal or installation of parts, inspection or
replacement), be sure to read the following items carefully, then follow the correct procedures
described in the repair manual.

Work must be started 90 seconds after the ignition switch is turned to the ºLOCKº position and
the negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds
from disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
airbag sensor assembly, front airbag sensor or side airbag sensor assembly directly to hot air
or flames.
NOTICE:

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly, side airbag assembly, airbag sensor assembly, front airbag sen-
sor and side airbag sensor assembly should be inspected.
(See page RS±14, RS±28, RS±41, RS±53, RS±58 and RS±63)

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, airbag sensor assembly, front airbag sensor or side airbag sensor assembly
in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, airbag sen-
sor assembly, front airbag sensor or side airbag sensor assembly has been dropped, or if there
are cracks, dents or other defects in the case, bracket or connector, replace it with new one.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.

After work on the SRS is completed, perform the SRS warning light check (See page DI±497).

When the negative (±) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back± up power supply from outside the vehicle.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.

RS0R3±02
AB0152
SST
AB0158
SSTBattery RS±16
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
2001 PRIUS (RM778U)
DISPOSAL
HINT:
When scrapping vehicle equipped with an SRS or disposing of
a steering wheel pad (with airbag), always first deploy the air-
bag in accordance with the procedure described below. If any
abnormality occurs with the airbag deployment, contact the
SERVICE DEPT. of TOYOTA MOTOR SALES, U.S.A., INC.
CAUTION:

Never dispose of a steering wheel pad which has an
undeployed airbag.

The airbag produces a sizeable exploding sound
when it deploys, so perform the operation out±of±
doors and where it will not create a nuisance to
nearby residents.

When deploying the airbag, always use the specified
SST (SRS Airbag Deployment Tool). Perform the op-
eration in a place away from electrical noise.
SST 09082±00700

When deploying an airbag, perform the operation at
least 10 m (33 ft) away from the steering wheel pad.

The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.

Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.

Always wash your hands with water after completing
the operation.

Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
1. AIRBAG DEPLOYMENT WHEN SCRAPPING VE-
HICLE
HINT:
Have a battery ready as the power source to deploy the airbag.

AB0152
SST
AB0158
SSTBattery
H01580
SST
H15221
H16242SST
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS±17
2001 PRIUS (RM778U)
(a) Check functioning of the SST.
CAUTION:
When deploying the airbag, always use the specified SST:
SRS Airbag Deployment Tool.
SST 09082±00700
(1) Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip to the battery neg-
ative (±) terminal.
HINT:
Do not connect the yellow connector which will be connected
with the supplemental restraint system.
(2) Press the SST activation switch, and check that the
LED of the SST activation switch lights up.
CAUTION:
If the LED lights up when the activation switch is not being
pressed, SST malfunction is probable, so definitely do not
use the SST.
(3) Disconnect the SST from the battery.
(b) Install the SST.
CAUTION:
Check that there is no looseness in the steering wheel and
steering wheel pad.
(1) While turning the steering wheel right / left, remove
the 3 screws and column lower cover.
(2) Disconnect the airbag connector of the spiral cable.
(3) Connect the connectors of the 2 SST to the airbag
connector of the spiral cable.
SST 09082±00700, 09082±00760
NOTICE:
To avoid damaging the connector of the SST and wire har-
ness, do not lock the secondary lock of the twin lock.