2001 TOYOTA PRIUS check

2001 PRIUS (EWD414U)
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.

I GROUND POINT
FAN MAIN RELAY
FAN MAIN RELAY
A/C FAN RELAY NO.2
A/C FAN RELAY NO.3
RADIATOR FAN MOTOR
RETRACT CONTROL
RELAY
RETRACT MOTOR RH
RETRACT MOTOR LH
FRONT TURN SIGNAL
LIGHT RH
PARKING LIGHT RH
FRONT TURN SIGNAL
LIGHT LH
PARKING LIGHT LH
DOOR LOCK CONTROL
SW RH
DOOR KEY LOCK
SW RH
DOOR LOCK MOTOR
RH
BLOWER RESISTOR
A/C AMPLIFIER
RADIO AND PLAYER
HEATER RELAY
AUTO ANTENNA
MOTOR
BLOWER SW
PARKING BRAKE SW
COMBINATION METER
HORN SW [COMB. SW]
TURN SIGNAL FLASHER
DOOR KEY LOCK SW LH
DOOR LOCK MOTOR LH
FUEL CONTROL SW
WOOFER AMPLIFIER
COMBINATION METER
COMBINATION METER
FUEL SENDER
CIGARETTE LIGHTER
O/D MAIN SW
CLOCK
5
5
5
5
4
4
4
4
4BA15
IB18
EA2 10
3E5
3E
6 3G
13 3F
3 3D
1 3B
7
ID115
IC33
IA12
E 3
A
A AW±B
W±BW±B W±B
W±B W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±BW±B W±B W±B W±B
W±B W±B
W±BW±B
W±B
W±B
W±B W±B
W±B
BR
W±B
BR BRW±BW±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B
W±B
BR W±B
BR BR
BR W±B W±BW±B
W±BW±BBR W±B (4A±GZE)
W±B A A A
I 6
I 6
I 2
I 2
I 2
B 5I 5
I 5
I 5
B 5
B 5
B 5
I 5
I 5
I 3I 3
E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6E 4
E 4
B 4
EAI 4
B 4
B 4
I 4I 8
IBIC
3C7
4
JUNCTION
CONNECTOR J 1
4
DOOR LOCK CONTROL
RELAY
ELECTRICAL IDLE-UP
CUT RELAY (M/T)FRONT SIDE MARKER
LIGHT RH
FRONT SIDE MARKER
LIGHT LH
BRAKE FLUID LEVEL
WARNING SW
UNLOCK WARNING
SW WIPER AND WASHER
SW [COMB. SW] LIGHT CONTROL SW
[COMB. SW] HEATER CONTROL
ASSEMBLY
HEATER SERVO
MOTOR AMPLIFIER
DIMMER SW
[COMB. SW]
CRUISE CONTROL
MIRROR SW
REAR WINDOW
DEFOGGER SW
POWER WINDOW
MASTER SW
POWER WINDOW
CONTROL RELAY
DOOR LOCK CONTROL
SW
REMOTE CONTROL
MIRROR SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

To Ignition SW
IG Terminal
Fuse
Voltmeter SW 1
Relay
SW 2Solenoid[A]
[B]
[C]
Ohmmeter
SW
Ohmmeter
Diode
Digital Type Analog Type
2001 PRIUS (EWD414U)
C TROUBLESHOOTING
VOLTAGE CHECK
(a)Establish conditions in which voltage is present at the check
point.
Example:
[A] ± Ignition SW on
[B] ± Ignition SW and SW 1 on
[C] ± Ignition SW, SW 1 and Relay on (SW 2 off)
(b)Using a voltmeter, connect the negative lead to a good ground
point or negative battery terminal, and the positive lead to the
connector or component terminal.
This check can be done with a test light instead of a voltmeter.
CONTINUITY AND RESISTANCE CHECK
(a)Disconnect the battery terminal or wire so there is no voltage
between the check points.
(b)Contact the two leads of an ohmmeter to each of the check
points.
If the circuit has diodes, reverse the two leads and check
again.
When contacting the negative lead to the diode positive side
and the positive lead to the negative side, there should be
continuity.
When contacting the two leads in reverse, there should be no
continuity.
(c)Use a volt/ohmmeter with high impedance (10 kW/V
minimum) for troubleshooting of the electrical circuit.

10
3
0.2
11
(mm) Reference:
Tool Up Example:
(Case 1)
Terminal Retainer
Terminal Retainer
[Retainer at Full Lock Position]
[Retainer at Temporary Lock Position]StopperTerminal
Retainer
Secondary
Locking Device Example:
(Case 2)
2001 PRIUS (EWD414U)
C TROUBLESHOOTING
HOW TO REPLACE TERMINAL
(with terminal retainer or secondary locking device)
1.PREPARE THE SPECIAL TOOL
HINT : To remove the terminal from the connector, please
construct and use the special tool or like object shown on
the left.
2.DISCONNECT CONNECTOR
3.DISENGAGE THE SECONDARY LOCKING DEVICE OR
TERMINAL RETAINER.
(a)Locking device must be disengaged before the terminal
locking clip can be released and the terminal removed from
the connector.
(b)Use a special tool or the terminal pick to unlock the secondary
locking device or terminal retainer.
NOTICE:
Do not remove the terminal retainer from connector body.
[A] For Non±Waterproof Type Connector
HINT : The needle insertion position varies according to the
connector's shape (number of terminals etc.), so
check the position before inserting it.
ºCase 1º
Raise the terminal retainer up to the temporary lock
position.
ºCase 2º
Open the secondary locking device.

Tool
Ta b
Ta b
Terminal
Retainer
Access Hole
( Mark)Tool
Tool
[Female] Example:
[Male] (Case 1)
[Male] [Female]Retainer
at Full Lock Position
Retainer
at Temporary Lock Position
Terminal Retainer
[Male]Press Down
[Female]Press DownTool
Tool Example:
(Case 2)
2001 PRIUS (EWD414U)
C
[B] For Waterproof Type Connector
HINT : Ter m inal ret ainer color is diff er ent
according to connector body.
Example:
Terminal Retainer
: Connector Body
Black or White : Gray
Black or White : Dark Gray
Gray or White : Black
ºCase 1º
Type where terminal retainer is pulled
up to the temporary lock position (Pull
Type).
Insert the special tool into the terminal
retainer access hole (
Mark) and pull
the terminal retainer up to the
temporary lock position.
HINT : The needle insertion position varies
according to the connector 's shape
(Number of terminals etc.), so check
the position before inserting it.
ºCase 2º
Type which cannot be pulled as far as
Power Lock insert the tool straight into
the access hole of terminal retainer as
shown.

2001 PRIUS (EWD414U)
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started after 90 seconds from when 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.)

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 memorized 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.

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

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

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly and side airbag sensor assembly
should be inspected.

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, seat belt
pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor
assembly or side airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case,
bracket or connector, replace them with new ones.

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 instructions on the notices.

After work on the SRS is completed, perform the SRS warning light check.

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

NEW MODEL OUTLINE
MAIN EQUIPMENT
182MO20
[Information Screen]
This screen indicates the direction of energy trans-
mission. It is also possible to check the current drive
method (engine, motor or both) and status of power
generation by the engine and that of charging regen-
erative energy.
This screen indicates the average fuel consumption,
amount of recovered energy and fuel consumption for
that moment. Average fuel consumption is displayed
at 5-minutes intervals. The recovered energy display
indicates the amount of energy recovered over the past
5 minutes, with each mark representing 50Wh.
182BE36
182BE37
17
A range of features for comfort - the more you use them,
the better they get.
Multi-Information Display

The 5.8º wide touch panel type multi-information color LCD
is standard.

Energy monitor, fuel consumption and other vehicle information
screens, audio operation status and audio operation screen can
be indicated on the multi-information display. The outside tem-
perature are also indicated on the screen.
[Audio system]

An AM/FM cassette and 4-speaker system compatible with the
multi-information display has been adopted.

As the touch panel type display is used to operate the audio sys-
tem, the multi-information display simultaneously indicates the
operating status of the audio system.

The antenna provided is a collapsible style pole antenna posi-
tioned at the center of the roof.
[GPS Voice Navigation]

A GPS (Global Positioning System) voice navigation system
is optional.

The multi-information display can show the map on favorite
type among turn list, arrow display and enlarged intersection.

Using DVD (Digital Versatile Disk) as a memory source for map
data, a large quantity of information can be processed.
 Main Function of the Multi-information Display
ScreenFunction
Enlargement / reduction, rotation and move-
ment of map
Mapscreen
Indication of current position and direction of
travel
Map screen
displayCorrection of current positiondis lay(option)Setting, change and indication of route()
Voice guidance
Indication of enlarged intersections
Memory and indication of map position
Audio screenStatus of audio equipment and audio opera-
tion screen indication
InformationEnergy monitor screen indicationInformationscreenFuel consumption screen indication
Adj t tSound quality adjustment screen indicationAdjustmentscreenImage quality adjustment screen indicationscreenNo indication
On-screenAudio status indicationOn screenindicationWarning indication
Interrupt screenWarning indication
DiagnosisscreenDisplays system diagnosisscreen
displayDisplays various types of coefficient settings

ENGINE ± 1NZ-FXE ENGINE
171EG13
Spring
Plunger
Cam
Cam Spring Check Ball
171EG32171EG31
Service Hole for
Chain Tensioner
Oil Pump
Front ViewBack View51
5. Chain Tensioner
The chain tensioner uses a spring and oil pres-
sure to maintain proper chain tension at all
times.
The chain tensioner suppresses noise generated
by the chain.
A ratchet type half-back mechanism is used.
6. Timing Chain Cover
A single-piece, aluminum die-cast timing chain cover that entirely seals the front portion of the cylinder
block and the cylinder head has been adopted.
A service hole for the chain tensioner has been provided in the timing chain cover to improve serviceabili-
ty.

ENGINE ± 1NZ-FXE ENGINE 76
Fail Safe
If an abnormal condition occurs with the ETCS-i, the check engine warning light in the combination meter
illuminates to alert the driver. The current to the throttle control motor is cut off to prevent the ETCS-i from
operating. This enables the return spring to close the throttle valve.
Diagnosis
If the diagnostic trouble code 89 is being output to the combination meter check engine warning light, it
means that the ECM has detected a malfunction in the ETCS-i, and outputs the diagnostic trouble code of
the ETCS-i.
Also, the diagnostic trouble code can be output to a hand-held tester via the data link connector 3.
For details, refer to the 2001 Prius Repair Manual (Pub. No.RM778U).