2001 TOYOTA PRIUS fuse

HV008±02
B12008
2 3 4
5 6 7 86 1
A BC
D
1 2 3
4 52
3 4
5 6 7 81
61 2 3
4 5
HV±14
± HYBRID VEHICLE CONTROLCONVERTER AND INVERTER ASSEMBLY
1344 Author: Date:
2001 PRIUS (RM778U)
CONVERTER AND INVERTER ASSEMBLY
ON±VEHICLE INSPECTION
1. INSPECT INVERTER
(a) Turn the IG switch OFF and disconnect the 4 connectors.
(b) Apply battery positive voltage to connector B terminal 5 (IGCT) on the inverter side through a fuse, and
battery negative voltage to connector B terminal 6 (GND).
(c) Measure the voltage and resistance between each terminal shown below and ground.
TerminalMeasuring ConditionSpecification
A, 5 (G ± INVT)
D, 5 (M±INVT)±Approx. 2 ± 4.5 V
C, 5 (VB)±Approx. 0.5 ± 4 V
A, 4 (G ± SDOWN)
D, 4 (M ± SDOWN)Apply battery positive voltage to terminal through the resistance of 1 kW.Approx. 5 ± 6 V
B, 8 (G ± FINV)
C, 8 (M ± FINV)
B, 7 (G ± SINV)
C, 7 (M ± SINV)
Connect the terminal to connector B terminal 6 through the resistance of 10 kW.7 ± 12 V approx. 0.2 sec.
A, 1 (G ± UU)
A, 2 (G ± VU)
A, 3 (G ± WU)
D, 1 (M ± UU)
D, 2 (M ± VU)
D, 3 (M ± WU)
Connect the terminal to connector B terminal 6 through the resistance of 1 kW.Approx. 6 ± 8 V
B, 1 (G ± IVA)
B, 2 (G ± IWA)
B, 3 (G ± IVB)
B, 4 (G ± IWB)
C, 1 (M ± IVA)
C, 2 (M ± IWA)
C, 3 (M ± IVB)
C, 4 (M ± IWB)
±Approx. 0 V
B, 6 (GND)
A, 6 (G ± GINV)
D, 6 (M ± GINV)
±Continuity
C, 6 (CVRSW)Install a cover for the connecting part of the power cable for the MG1 and MG2.Continuity

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±3
1670 Author: Date:
2001 PRIUS (RM778U) Headlight does not come on.
1. Headlight Control Relay
2. Wire HarnessBE±20
±
Headlight does not come on.1. Bulb
2. Wire Harness±
±
Headlight flickers.1. Bulb
2. Wire Harness±
±
Headlight is dark.1. Bulb
2. Wire Harness±
±
Only one taillight comes on.1. Bulb
2. Wire Harness±
±
Taillight does not come on.
(Headlight is normal)
1. TAIL Fuse
2. Taillight Control Relay
3. Light Control Switch
4. Wire HarnessBE±12
BE±42
BE±20
±
Taillight does not come on.
(Headlight does not light)1. Light Control Switch
2. Wire HarnessBE±20
±
w/ Daytime Running Light System:
SymptomSuspect AreaSee page
Only one headlight comes on.
1. Daytime Running Light Relay
2. Daytime Running Light Main Relay
3. Bulb
4. Wire HarnessBE±20
BE±20
±
±
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 LO (LH) Fuse
3. HEAD LO (RH) Fuse
4. Wire Harness±
BE±12
BE±12
±
ºHI±Beamº does not light (All).
1. Headlight Dimmer Switch
2. Daytime Running Light Main Relay
3. Combination MeterBE±20
BE±20
±
ºHI±Beamº does not light (One side).
1. Bulb
2. HEAD HI (LH) Fuse
3. HEAD HI (RH) Fuse
4. Daytime Running Light No.2 Relay
5. Wire Harness±
BE±12
BE±12
BE±20
±
ºFlashº does not light.
1. Headlight Dimmer Switch
2. Daytime Running Light Main Relay
3. Wire HarnessBE±20
BE±20
±
Headlight does not come on.
1. Headlight Control Relay
2. Daytime Running Light Main Relay
3. Daytime Running Light No.2 Relay
4. Headlight Dimmer Switch
5. Light Control Switch
6. Body ECU
7. Wire Harness
8. BulbBE±20
BE±20
BE±20
BE±20
BE±20
DI±678
±
±
Headlight does not come on with light control switch in HEAD.
1. Light Control Switch
2. Body ECU
3. Wire HarnessBE±20
DI±678
±
Headlight does not go out with light control switch in OFF.
1. Headlight Control Relay
2. Body ECU
3. Wire HarnessBE±20
DI±678
±

BE±4
± BODY ELECTRICALTROUBLESHOOTING
1671 Author: Date:
2001 PRIUS (RM778U) Headlight flickers.
1. Bulb
2. Wire Harness±
±
Headlight is dark.1. Bulb
2. Wire Harness±
±
Taillight does not come on with light control switch in TAIL.1. Taillight Control Relay
2. Wire HarnessBE±20
±
Taillight does not go out with light control switch in OFF.1. Taillight Control Relay
2. Wire HarnessBE±20
±
Headlight does not come on with engine running and light control
switch in OFF.
1. ECU±B Fuse
2. GAUGE Fuse
3. Daytime Running Light Main Relay
4. Daytime Running Light Relay
5. Alternator L Terminal
6. Body ECU
7. Parking Brake Switch
8. Wire HarnessBE±12
BE±12
BE±20
BE±20
±
DI±678
BE±42
±
TURN SIGNAL AND HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
ºHazardº and ºTurnº do not light up.
1. GAUGE Fuse
2. TURN HAZ Fuse
3. Ignition Switch
4. Turn Signal Flasher Relay
5. Wire HarnessBE±12
BE±12
BE±17
BE±25
±
Hazard warning light does not light up.
(Turn is normal)1. Hazard Warning Switch
2. Wire HarnessBE±25
±
Turn signal does not light up.
(Hazard is normal)1. Turn Signal Switch
2. Wire HarnessBE±25
±
Turn signal does not light up in one direction.1. Turn Signal Switch
2. Wire HarnessBE±25
±
Only one bulb does not light up.1. Bulb
2. Wire Harness±
±
INTERIOR LIGHT 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 lights do not come ON.DOME FuseBE±12
The driver door courtesy light does not come ON when the
driver's door is opened.1. Driver's Door Courtesy Switch
2. Wire Harness
3. Body ECUBE±27
±
±
The passenger door courtesy light does not come ON when the
passenger's door is opened.1. Passenger's Door Courtesy Switch
2. Wire Harness
3. Body ECUBE±27
±
DI±678
The room light does not come on when the rear±right door is
opened.
1. Rear±Right Door Courtesy Switch
2. Wire Harness
3. Body ECU
4. Room LightBE±27
±
DI±678
±
The room light does not come on when the rear±left door is
opened.
1. Rear±Left Door Courtesy Switch
2. Wire Harness
3. Body ECU
4. Room LightBE±27
±
DI±678
±
Only one of the bulbs comes ON.Bulb±

± 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±
±

BE±6
± BODY ELECTRICALTROUBLESHOOTING
1673 Author: Date:
2001 PRIUS (RM778U)
WIPER AND WASHER SYSTEM
SymptomSuspect AreaSee page
Wipers and washer do not operate.
1. WIPER Fuse
2. Wiper Switch
3. Wiper Motor
4. Wire HarnessBE±12
BE±34
BE±34
±
Wipers do not operate in LO, HI or MIST.
1. Wiper Switch
2. Wiper Motor
3. Wire HarnessBE±34
BE±34
±
Wipers do not operate in INT.
1. Wiper Switch
2. Wiper Motor
3. Wire HarnessBE±34
BE±34
±
Washer motor does not operate.
1. WASHER Fuse
2. Washer Switch
3. Washer Motor
4. Wire HarnessBE±12
BE±34
BE±34
±
Wipers do not operate when washer switch ON.
1. WASHER Fuse
2. Washer Switch
3. Wiper Motor
4. Wire HarnessBE±12
BE±34
BE±34
±
Washer fluid does not operate.Washer Hose and Nozzle±

When wiper switch is in HI position, the wiper blade is in contact
with the body.

When the wiper switch is OFF, the wiper blade does not retract
or the retract position is wrong.
1. Wiper Motor *1
2. Wire harness *1BE±34
±
*1: Inspect wiper arm and blade set positions.
Meter Gauges and Illumination:
COMBINATION METER
SymptomSuspect AreaSee page
Fuel Gauge and Water Temperature Gauge does not operate.
1. GAUGE Fuse
2. Meter Circuit Plate
3. Wire Harness±
BE±39
±
Speedometer does not operate.
1. Vehicle Speed Sensor
2. Meter Circuit Plate
3. Wire HarnessBE±42
BE±39
±
Tachometer does not operate.
1. Igniter
2. Engine and ECT ECU
3. Meter Circuit Plate
4. Wire Harness±
±
BE±39
±
Fuel Gauge does not operate or abnormal operation.1. Fuel Tank Assembly
2. Wire Harness±
±
All illumination lights do not light up.
1. TAIL Fuse
2. Meter Circuit Plate
3. Wire Harness±
BE±42
±
Only one illumination light does not light up.1. Bulb
2. Wire Harness±
±

± BODY ELECTRICALTROUBLESHOOTING
BE±7
1674 Author: Date:
2001 PRIUS (RM778U)
Warning Lights:
COMBINATION METER
SymptomSuspect AreaSee page
Warning light do not light up. (Except Discharge, Open Door and
SRS)
1. GAUGE Fuse
2. Meter Circuit Plate
3. DC/DC converter
4. Wire Harness±
BE±39
±
±
Fuel Level warning light does not light up.
1. Bulb
2. Meter Circuit Plate
3. Fuel Tank Assembly
4. Wire Harness±
BE±39
±
±
Low Oil Pressure warning light does not light up.
1. Bulb
2. Low Oil Pressure Warning Switch
3. Meter Circuit Plate
4. Wire Harness±
BE±42
BE±39
±
ABS warning light does not light up.
1. Bulb
2. ABS ECU
3. Wire Harness±
DI±351
±
Seat Belt warning light does not light up.
1. Bulb
2. Buckle Switch
3. Meter Circuit
4. Wire Harness±
BE±42
BE±42
±
Brake warning light does not light up.
1. Bulb
2. Parking Brake Switch
3. Brake Fluid Level Warning Switch
4. Meter Circuit Plate
5. Wire Harness±
BE±42
BE±42
BE±39
±
SRS Warning light does not light up.
1. Bulb
2. Airbag Sensor Assembly
3. Meter Circuit Plate
4. Wire Harness±
DI±495
BE±39
±
Open Door warning light does not light up.
1. DOME Fuse
2. Bulb
3. Door Courtesy Switch
4. Meter Circuit Plate
5. Wire Harness±
±
BE±27
BE±39
±
Indicator Lights:
COMBINATION METER
SymptomSuspect AreaSee page
High beam indicator light does not light up.
1. Bulb
2. Meter Circuit Plate
3. Wire Harness
4. Headlight System±
BE±39
±
BE±20
Turn indicator light does not light up.
1. Bulb
2. Meter Circuit Plate
3. Wire Harness
4. Turn Signal and Hazard Warning System±
BE±39
±
BE±25
Malfunction indicator light does not light up.
1. Bulb
2. ECM
3. Meter Circuit Plate
4. Wire Harness±
±
BE±39
±
Indicator lights do not light up. (Except Turn, Hi±beam and
security)1. GAUGE Fuse
2. Wire Harness±
±

BE±8
± BODY ELECTRICALTROUBLESHOOTING
1675 Author: Date:
2001 PRIUS (RM778U) Shift position indicator light does not light up.
1. ECM
2. Shift Position Sensor
3. HV ECU
4. Meter Circuit Plate
5. Wire Harness±
HT±54
±
BE±39
±
CRUISE indicator light does not light up.
1. Bulb
2. HV ECU
3. Meter Circuit Plate
4. Wire Harness±
±
BE±39
±
DEFOGGER 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
Rear window defogger does not operate.
1. DEF M±Fuse
2. Defogger Relay
3. Defogger Switch (in A/C Amplifier)
4. Defogger Wire
5. Wire Harness
6. Body ECU
7. Noise Filter
8. A/C ECUBE±12
BE±49
DI±864
BE±49
±
DI±678
±
DI±864
Mirror heater does not operate.
1. M±HTR Fuse (Passenger SIde J/B)
2. Mirror Heater Relay
3. Mirror Heater
4. Wire HarnessBE±12
BE±49
BE±49
±
POWER WINDOW 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
Power window dose not operate.
1. ECU B Fuse
2. GAUGE Fuse
3. Power Main Relay
4. Ignition Switch
5. Power Window Master Switch
6. Body ECU
7. Wire HarnessBE±12
BE±12
BE±56
BE±17
BE±56
DI±678
±
Only the driver's window does not operate.
1. Power Window Master Switch
2. Power Window Switch
3. Power Window Motor
4. Wire HarnessBE±56
BE±56
BE±56
±
ºWindow lock functionº does not operate.Power Window Master SwitchBE±56
Illumination does not light up.Power Window Master SwitchBE±56