2001 TOYOTA PRIUS clock

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.

2001 PRIUS (EWD414U)
B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
Theft Deterrent and Door Lock Control
J POWER SOURCE (Current Flow Chart)
11
1
EA1 1EA2 3
7
EB16
E 6
E 7I 2I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
W W
B B B B BW±B
B
B
B B±O
B±W
W±B
B±W STARTER RELAY INJECTION RELAY15A HAZ±RADIO7.5A AM250A MAIN 1.25B FL MAIN
BATTERY
WWW
W W W
R W±L
W
W
G±W
G
15A TAIL
20A DEFOG
15A RAD CIGTA I L
RELAY 7.5A DOME 40A DOOR LOCK CB
2 1
1 2
4 8
2 3
3 4
G
W±R
P±L B±Y
B±Y
W±R
AM2 IG2
ACC
IG1AM1W W
W±R
W W
W±B
21
1
1
1
1
2
2
2
2
3
4
3
4 1
2
1
22
1
11
1
IGNITION SW I 8
Battery
30A AM2
2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning STOP
Fuse Page
194
214
11 2
System
DOME 20A
10ACombination Meter
Headlight
Interior Light
2
2
6 100A ALT
EB1
POWER SOURCE
Light Auto Turn Off187
180
166
210
230
122
10A ECU±B
5 60A ABS
2
6 Fusible Link Block2
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

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.

BODY ELECTRICAL ± ACCESSORIES
151LBE24
GPS Sateilites
Difference
Difference
Difference
Difference181
5) Detecting the Vehicle Position
The navigation ECU calculates the position based on the principle of a 3-point measurement.
The GPS satellites are equipped with high-precision clocks. Thus, the satellites are able to transmit con-
tinuous orbit signals and radiowave transmission time signals.
The navigation ECU also contains a clock, which can understand the radiowave time signals that are re-
ceived from the satellites.
As a result, the length of time that is taken by the radiowaves to arrive from the satellites to the antenna
can be determined. Thus, the lengths of time that elapse for the radiowaves of the 4 satellites to reach
the antenna are measured. Each of these lengths of time are multiplied by the luminous flux (the rate of
transmission of luminous energy: approximately 300,000 km per second), the results of which are the
distances from the satellites to the antenna. Because the positions of the GPS satellites are known by their
signals, the receiving point (vehicle position) can be rendered as the point in which the 4 spheres (of
which the centers are the respective satellites) converge.
However, due to the differences that exist between the clocks of the satellite and the ECU, the 4 spheres
do not converge at a single point. Therefore, the ECU uses another satellite to calculate the point at which
the 4 spheres converge at a single point and corrects its internal clock. As a result, the ECU determines
the vehicle position and adjusts its internal clock to the clocks of the satellites.

BO4111
Negative Cable
± INTRODUCTIONFOR ALL OF VEHICLES
IN±21
21 Author: Date:
2001 PRIUS (RM778U)
7. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER
(a) The PRIUS is equipped with an SRS (Supplemental Re-
straint System), such as the driver airbag, front passen-
ger airbag assembly, side airbag assembly and seat belt
pretensioner.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.
(b) GENERAL NOTICE
(1) Malfunction symptoms of the supplemental re-
straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See page DI±497).
(2) Work must be started after 90 seconds from the
time the ignition switch is turned to the ºLOCKº posi-
tion and the negative (±) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back±up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (±) terminal cable from the battery, the SRS
may deploy.)
When the negative (±) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
To avoid erasing the memory of each memory sys-
tem, never use a back±up power supply from anoth-
er battery.

± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±333
2001 PRIUS (RM778U)
3 Is DTC P3009 of battery ECU being output?
PREPARATION:
(a) Before clearing the DTC, check that related DTC and freeze frame data are recorded in the given table.
(b) With the shift lever in P, delete this DTC using a TOYOTA hand±held tester.
(c) Turn the ignition switch OFF and then ON (Do not turn to ST.), leave it alone for 1 min. and then check
for DTC.
CHECK:
Check that DTC P3009 is detected.
YES Go to step 8.
NO
4 Is DTC P3009 of battery ECU being output?
(Check for battery carrier catch bracket.)
PREPARATION:
(a) Under step 2 condition, turn the ignition switch OFF and disconnect the negative terminal of the auxilia-
ry battery.
(b) Remove the service plug.
(c) Using the service plug, turn the interlock counterclockwise to unlock.
(d) Remove the 3 nuts and battery carrier catch bracket.
(e) Connect the negative terminal of the auxiliary battery and turn the ignition switch ON to clear DTC.
HINT:
When the ignition switch is turned ON, DTC P3140 is stored in the HV ECU. This happens because the ser-
vice plug is removed, so continue the operation.
(f) After turning the ignition switch OFF, connect the service plug.
(g) Turn the ignition switch ON (to ST), leave it alone for 1 min. and then check for DTC.
CHECK:
Check that DTC P3009 is detected.
NO Check for contact between battery carrier catch
bracket and power cable and if any defect is
identified, replace defective part.
HINT:
If no defect is identified at inspection, entry of foreign matter or
water into the battery assembly or converter & inverter assem-
bly may be possible as a cause.
YES

DI±336
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U) 4/27/01
8 Is DTC P3009 of battery ECU being output?
(Check for battery cover.)
PREPARATION:
(a) Under step 2 condition, turn the ignition switch OFF and disconnect the negative terminal of the auxilia-
ry battery.
(b) Remove the service plug.
(c) Using the service plug, turn the interlock counterclockwise to unlock.
(d) Remove the 3 nuts and battery carrier catch bracket.
(e) Remove the 2 bolts and power cables.
(f) Remove the battery cover.
(g) Connecting the negative terminal of the auxiliary battery, turn the ignition switch ON and clear the DTC.
HINT:
When the ignition switch is turned ON, DTC P3140 is stored in the HV ECU. This happens because the ser-
vice plug is removed, so continue the operation.
(h) After turning the ignition switch OFF, connect the service plug.
(i) Turn the ignition switch ON (to ST), leave it alone for 1 min. and then check for DTC.
CHECK:
Check that DTC P3009 is detected.
NO Check for contact between battery carrier catch
bracket and power cable and if any defect is
identified, replace defective part.
HINT:
If no defect is identified at inspection, entry of foreign matter or
water into the battery assembly or converter & inverter assem-
bly may be possible as a cause.
YES

A11252Matchmarks
A10471
EM±6
± ENGINE MECHANICALVALVE CLEARANCE
1122 Author: Date:
2001 PRIUS (RM778U)
4. ADJUST VALVE CLEARANCE
(a) Set the No.1 cylinder to the TDC/compression (See pro-
cedure in step 2).
(b) Place matchmarks on the timing chain and camshaft tim-
ing sprockets.
(c) Remove the 2 plug from the timing chain cover.
(d) Using drivers or equipment, while rotating the stopper
plate of the tensioner downward, turn the exhaust cam-
shaft right a little and push in the plunger of the chain ten-
sioner as shown in the illustration.
HINT:
When the stopper plate cannot be lowered easily, rotate the ex-
haust camshaft right and left a little.
(e) Insert a bar of ù 2 ± 3 mm (0.08 ± 0.12 in.) into the holes
in the stopper plate and tensioner to fix the stopper plate.
HINT:

At this time, it is easier to fix by installing the bar while ro-
tate the camshaft right and left a little.

Fix the bar with tape so that the bar does not come off.
(f) Remove the timing chain from the camshaft timing
sprocket.
NOTICE:

Never rotate the crankshaft with the timing chain re-
moved.

When rotating the camshaft with the timing chain re-
moved, rotate the crankshaft counterclockwise 40°
from the TDC and align the oil jet hole with the paint
mark before rotating it.

When installing the timing chain, make sure to return
it to the position of the matchmarks for camshaft and
then rotate the crankshaft clockwise to return.
HINT:
When the chain cannot be removed easily, rotate the intake
camshaft right and left a little.
(g) Hold the hexagonal portion of the camshaft with a
wrench, and remove the bolt and valve timing controller
assembly with the chain.
NOTICE:
Do not disassembled the valve timing controller assembly.
(h) Remove the intake and exhaust camshaft assembly.
HINT:
When disconnect the timing chain from the camshaft timing
sprocket, holding the timing chain.