2001 TOYOTA PRIUS door lock

I15498
Body ECU W5
Wireless Door Control Receiver (Tuner)
5
S
PRG B9
B89
7
3R±G
B±R +B
2
RDA
B88
L J27
J/C
R±G
PRG
RDAFF
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±771
2001 PRIUS (RM778U)
DTC B1242 / 42 Wireless door lock tuner circuit mal-
function
CIRCUIT DESCRIPTION
This DTC is output when GND short of RDA terminal is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1242/42GND short of RDA terminal

Wireharness

Wireless door lock tuner

Body ECU
WIRING DIAGRAM
DI1SS±05

BR1JA±01
F12629
Front Door Scuff Plate Cowl Side TrimHood Lock Release
Lever Lower Column CoverRadio Tuner Opening CoverCluster Finish Panel
Assembly Hazard Warning Switch
Lower Center Cluster
Finish PanelGlove Compartment
Door Finish PanelInstrument PanelNo. 3 Register No. 2 Side Defroster
Nozzle
Front Pillar GarnishPassenger Air Bag
Assembly Cluster Finish Panel
Combination Meter
Lower Finish PanelSteering Wheel Pad Steering Wheel
Spiral CableUpper Column Cover
Front Door Scuff PlateCowl Side Trim No. 1 RegisterNo. 1 Side Defroster
NozzleFront Pillar Garnish
: Specified torqueN´m (kgf´cm, ft´lbf)
50 (510, 37)
BR±10
± BRAKEPARKING BRAKE PEDAL
2001 PRIUS (RM778U)
COMPONENTS

BR1JF±01
F12415
Wiper Arm
Cowl Top Ven-
tilator Louver
LH
Hood to Cowl Top Seal
Wiper Motor & Link Assembly
Outer Front Cowl Top Panel
Converter and Inverter
Assembly
Front Door Scuff PlateLower Finish Panel Cowl Top Ventilator Louver RH
Finish Panel Engine Room
R/B No. 2

Gasket Clip
Cowl Side Trim
13 (130, 9)
Clevis PinWave Washer
Clip
Return Spring
Circuit Breaker
SensorMG 2
MG 1
20 (204, 15)
8.0 (82, 71 in.´lbf)
Clip
Lithium soap base glycol grease: Specified torque
N´m (kgf´cm, ft´lbf)

Non±reusable part
Reservoir Hose
Master Cylinder Reservoir Hose
8.0 (82, 71 in.´lbf)
8.0 (82, 71 in.´lbf)
Inverter Terminal
Cover

Gasket
Hood Lock Release
Lever
Connector Cover
Wiper Motor Cover
21 (214, 15)
26 (270, 20)
7.4 (75, 64 in.´lbf)
5.4 (55, 48 in.´lbf)
15 (155, 11)
21 (214, 15)
BR±16
± BRAKEBRAKE MASTER CYLINDER
1531 Author: Date:
2001 PRIUS (RM778U)
BRAKE MASTER CYLINDER
COMPONENTS

H15519
H15510
SST
R13455
10 m (33 ft) or more
SSTBattery
H03286
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
RS±31
2001 PRIUS (RM778U)
(b) Disconnect the airbag connector.
(1) Using a screwdriver, pry out the glove compartment
door finish plate inside the lower panel.
HINT:
Tape the screwdriver tip before use.
(2) Remove the connector from the glove compartment
door finish plate.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(3) Disconnect the airbag connector.
(c) Install the SST.
(1) Connect the connectors of the 2 SST to the front
passenger airbag assembly connector.
SST 09082±00700, 09082±00760
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(2) Move the SST to at least 10 m (33 ft) away from the
front of the vehicle.
(3) Close all the doors and windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(4) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the negative (±) termi-
nal.
(d) Deploy the airbag.
(1) Check that no one is inside the vehicle or within 10
m (33 ft) area around the vehicle.
(2) Press the SST activation switch and deploy the air-
bag.

H15678
H15679Battery
SST
R13455
10 m (33 ft) or more
SSTBattery
H15680
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±43
2001 PRIUS (RM778U)
(b) Disconnect the side airbag connector.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(c) Install the SST.
(1) Connect the connectors of the 2 SST to the airbag
connector.
SST 09082±00700, 09082±00750
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(2) Move the SST at least 10 m (33 ft) away from the
front of the vehicle.
(3) Close all the doors and windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(4) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the battery negative
(±) terminal.
(d) Deploy the airbag.
(1) Check that no one is inside the vehicle or within 10
m (33 ft) area around the vehicle.
(2) Press the SST activation switch and deploy the air-
bag.
CAUTION:

The side airbag assembly is very hot when the airbag
is deployed, so leave it alone for at least 30 minutes
after deployment.

Use gloves and safety glasses when handling the
side airbag assembly with the deployed airbag.

Do not apply water, etc. to the side airbag assembly
with the deployed airbag.

Always wash your hands with water after completing
the operation.

When scrapping a vehicle, deploy the airbag and
scrap the vehicle with the side airbag assembly still
installed.

BE16S±02
BE±2
± BODY ELECTRICALTROUBLESHOOTING
1669 Author: Date:
2001 PRIUS (RM778U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
IGNITION SWITCH:
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Ignition switch is not set to each position.3. Ignition switch
4. Power source circuitBE±17
±
KEY UNLOCK WARNING SWITCH:
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Key unlock warning system does not operate.
(The buzzer sounds when the ignition key is ACC or ON)
1. Ignition Switch
2. Key Unlock Warning Switch
3. Wire Harness
4. Body ECU
5. Combination MeterBE±17
BE±17
±
±
±
HEADLIGHT AND TAILLIGHT SYSTEM:
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Auto turn±off system does not operate when the driver's door is
opened.1. Drivers Door Courtesy Switch
2. Body ECUBE±27
DI±678
Auto turn±off system:
Headlight and taillight do not come on.1. Body ECU
2. Wire HarnessDI±678
±
Auto turn±off system:
Headlight and taillight stay on.1. Body ECU
2. Wire HarnessDI±678
±
w/o Daytime Running Light System:
SymptomSuspect AreaSee page
Only one headlight comes on.1. Bulb
2. Wire Harness±
±
ºLO±Beamº does not light (All).1. Headlight Control Relay
2. Wire HarnessBE±20
±
ºLO±Beamº does not light (One side).
1. Bulb
2. HEAD LH Fuse
3. HEAD RH Fuse
4. Wire Harness±
BE±12
BE±12
±
ºHI±Beamº does not light (All).1. Headlight Dimmer Switch
2. Wire HarnessBE±20
±
ºHI±Beamº does not light (One side).
1. Bulb
2. HEAD LH Fuse
3. HEAD RH Fuse
4. Wire Harness±
BE±12
BE±12
±
ºFlashº does not light.
1. HEAD LH Fuse
2. HEAD RH Fuse
3. Headlight Dimmer Switch
4. Wire HarnessBE±12
BE±12
BE±20
±
ºFlashº does not light.1. Bulb
2. Wire Harness±
±

± BODY ELECTRICALTROUBLESHOOTING
BE±5
1672 Author: Date:
2001 PRIUS (RM778U) The illumination does not fade out when all the doors are closed.
1. Courtesy Switch
2. Wire Harness
3. Body ECUBE±27
±
DI±678
The illumination does not fade out immediately when the ignition
switch is turned to ACC or ON within 15 seconds after all the
doors are closed.
1. Ignition Switch
2. ECU±B Fuse
3. GAUGE Fuse
4. Wire Harness
5. Body ECUBE±17
BE±12
BE±12
±
DI±678
The illumination does not fade out immediately when all the doors
are locked within 15 seconds after they are closed.1. Door Unlock Detection Switch
2. Wire Harness
3. Body ECUBE±62
±
DI±678
Interior light does not light up.
(in front personal light)1. Bulb
2. Personal Light
3. Wire Harness±
BE±27
±
Front personal light does not light up.
1. Bulb
2. Personal Light
3. Wire Harness±
BE±27
±
Rear personal light does not light up.
1. Bulb
2. Interior Light
3. Wire Harness±
BE±27
±
Luggage compartment light does not light up.
1. Bulb
2. Luggage Compartment Door Courtesy Switch
3. Wire Harness±
BE±27
±
Courtesy light does not light up.
1. Bulb
2. Door Courtesy Switch
3. Wire Harness
4. Body ECU±
BE±27
±
DI±678
BACK±UP LIGHT SYSTEM
SymptomSuspect AreaSee page
Back±Up Light does not light up.
1. GAUGE Fuse
2. Ignition Switch
3. Back±up Light Relay
4. Wire Harness
5. BulbBE±12
BE±17
BE±30
±
±
Back±Up Light remains always on.1. Bulb
2. Wire Harness±
±
Only one light does not light up.1. Bulb
2. Wire Harness±
±
STOP LIGHT SYSTEM
SymptomSuspect AreaSee page
Stop light does not light up.
1. STOP Fuse
2. Stop Light Switch
3. Wire HarnessBE±12
BE±32
±
Stop light always lights up.1. Stop Light Switch
2. Wire HarnessBE±32
±
Only one light always lights up.Wire Harness±
Only one light does not light up.1. Bulb
2. Wire Harness±
±

± BODY ELECTRICALTROUBLESHOOTING
BE±9
1676 Author: Date:
2001 PRIUS (RM778U)
POWER DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
All the doors cannot be locked or unlocked.
(Power Window Control System is normal.)1. Door Lock Control Switch
2. Body ECU
3. Wire HarnessBE±62
DI±678
±
Only one side door lock control does not operate.1. Door Lock Motor
2. Wire HarnessBE±62
±
Door key related function does not operate.
1. Door Key Lock and Unlock Switch
2. Body ECU
3. Wire HarnessBE±62
DI±678
±
Key confinement prevention function does not operate.
1. Key Unlock Warning Switch
2. Door Courtesy Switch
3. Body ECU
4. Wire HarnessBE±17
BE±27
DI±678
±
THEFT DETERRENT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
HINT:
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is
operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that
the door lock control system is operating normally.
SymptomSuspect AreaSee page
The theft deterrent system cannot be set
1. Indicator light circuit
2. ECU power source circuit
3. Key unlock warning switch circuit
4. Door key lock and unlock switch circuit
5. Door courtesy switch circuit
6. Door unlock detection switch circuit
7. Engine hood courtesy switch circuitDI±704
DI±685
DI±695
DI±724
DI±714
DI±710
DI±720
The indicator light does not blink when system is set.Indicator light circuitDI±704
When the system is set
(The system does not operate when the rear door is unlocked).Door unlock detection switch circuitDI±710
When the system is set
(The system does not operate when the luggage compartment
door is opened by a method other than the key).
Luggage compartment door courtesy switch circuitDI±722
When the system is set
(The system does not operate when the engine hood is lifted).Engine hood courtesy switch circuitDI±720
While the system is in warning operation
(Horns do not sound).Horn relay circuitDI±697
While the system is in warning operation
(Headlights do not flash).Headlight control relay circuitDI±693
While the system is in warning operation
(Taillights do not flash).Taillight control relay circuitDI±691
While the system is in warning operation
(The door lock is not locked).Door unlock detection switch circuitDI±710
System is still set even when a rear door is openDoor courtesy switch circuitDI±714
Even when the system is not set
(Horns sound).Horn relay circuitDI±697