2001 TOYOTA PRIUS Service Repair Manual

BODY ELECTRICAL ± METER
182BE05
Km / h-MPH Selector Switch
182BE06
Odo Meter
Trip Meter A
Trip Meter B
Odo / Trip Selector / Reset Switch147
2. Construction and Operation
Speedometer

The speedometer is displayed digitally
through the VFD (Vacuum Fluorescent Dis-
play). It can be switched between the km / h
and MPH readings by operating the km / h-
MPH selector switch located in the middle of
the center cluster.

The vehicle speed signal, which originates at
the speed sensor that is installed in the hybrid
transaxle, travels via the HV ECU and ECM
(BEAN) and is received by the meter ECU.
Odo / Trip Meter
Similar to the speedometer, the odo / trip meter is
displayed digitally through the VFD (Vacuum
Fluorescent Display). By operating the odo / trip
selector / reset switch located in the middle of the
center cluster, its display can be switched in the
following sequence: odometer
trip meter A

trip meter B.
While trip meter A or B is displayed, pressing the
odo / trip selector / reset switch 0.8 seconds or
longer causes the driven distance displayed by
the current trip mode to revert to 0.0 mile or 0.0
km.
The trip meter will resume measuring the dis-
tance at the moment the odo / trip selector / reset
switch is released.

BODY ELECTRICAL ± METER
182BE07
Combination Meter
Sender
Gauge
Meter
ECU
Inclination Sensors
Temperature Signal
Sender
Gauge Signal Fuel Injection
Signal
ECM
Body ECU
Sender
Gauge Signal
Fuel TankAmbient
Temperature Sensor
Fuel Sender Gauge
Main Tank Sub Tank Fuel Pump 148
Fuel Gauge
For the purpose of correcting the calculation of the fuel level by the meter ECU, two inclination sensors
that detect the vehicle's longitudinal and latitudinal inclinations have been provided in the meter ECU, and
an ambient temperature sensor has been provided in the fuel tank to detect the temperature in the fuel tank.
The fuel level is calculated by the meter ECU in accordance with the signals of the sender gauge located
in the sub tank that have been received via the body ECU, and the fuel injection signals received from the
ECM. At this time, corrections are made by the signals from the inclination sensors that detect the vehicle's
longitudinal and latitudinal inclinations and the ambient temperature sensor that detects the temperature in
the fuel tank.

BODY ELECTRICAL ± METER
182BE08
Flashes when the
ignition switch is
turned to START
Illuminates when
the vehicle is ready
to be driven
Service Tip

Inverter unit cover is left open.

HV ECU has detected a collision.149
ªREADYº Light
When the shift position is P, turning the ignition
switch to START causes the ªREADYº light to
flash and enables the vehicle to be driven. Then,
this indicator illuminates and the buzzer sounds
simultaneously.
If the indicator does not illuminate, the vehicle cannot be driven because one of the driving prohibition
conditions listed below applies.

Service plug disconnected.

Hybrid system abnormality.

Driving prohibition condition due to overload
on MG1, MG2 or inverter.
Master Warning Light
A master warning light that informs the driver if an abnormality occurs in either the EMPS, HV batteries,
or the THS has been adopted.
If an abnormality occurs in the system, the master warning light illuminates and the multi-information dis-
play shows the warning items. For details, see page 178.
Output Control Warning Light
An output control warning light has been adopted to show the drop of power function due to the output drop
of HV batteries.
This warning light comes on when the temperature of HV batteries is higher or lower than that of specified
range, or when SOC (State of Charge) is lower than the specified value with the shift position in R range.
When this warning light comes on, avoid sudden acceleration and drive carefully.

BODY ELECTRICAL ± WIPER
Conventional Type
182BE09 182BE10
Wiping area enlarged through
the telescopic movement
Telescopic Type
182BE11
Passenger Wiper ArmIdle Lever
Driver Wiper Arm
Pivot
Wiper LinkMain Lever PivotWiper LinkPivot
Wiper Motor
Rotation Diameter 150
WIPER
TELESCOPIC WIPER
1. General

The telescopic wiper has been adopted.

The telescopic wiper consists of a wiper arm for the front passenger side that wipes telescopically from
the stopped position to the upper return position in order to enlarge the wiping area.
2. Construction
The telescopic wiper mainly consists of a driver wiper arm, passenger wiper arm, main lever, idle lever, wiper
link and wiper motor.

BODY ELECTRICAL ± WIPER
182BE12
Idle Lever
Pivot Wiper Arm
Direction of Rotation
of Wiper MotorPivot
Wiper LinkMain Lever P
2P1
182BE13
Wiper Arm
P
2P1
Idle Arm P3Direction of Rotation
of Wiper Motor
182BE14
Wiper
Arm
P
2
P1Direction of Rotation
of Wiper Motor151
3. Operation

With the rotation of the wiper motor, the wiper link for driving wiper will operate and connection point
P
1 with the main lever will move toward the arrow mark by the influence of the wiper link with a pivot
as a supporting point. With this, the connection point P
2 between the wiper arm and the idle lever becomes
the supporting point of the pry and starts wiping by holding the arm upward.

In addition, when the wiper motor rotates, P
1 and P2 will move toward the arrow mark.
Then, the wiper arm with P
3 as a supporting point will rise by the influence of the idle arm as if expanding
upward to the left. With this, it enables to wipe wider range.

When the wiper motor rotates more, P
1 and P2 will move toward the arrow mark. The wiper arm with P2
as a supporting point will move toward contracting direction and wipe further to the upper reversal position.