TOYOTA PRIUS 2001 Service Repair Manual

2001 PRIUS (EWD414U)
BUZZERB 3A132B 7
2A 6A GAG B GBG
114
4 11
GR± LV±W V±W V±W
GR±L GR ±B GR
LV±W
MPX+ MPD1 MPD2
MP2+
C11 , A C10 B
COMBINATION METERA/C AMPLIFIER A 7
GATEWAY ECU G 1
JUNCTION
CONNECTORB J27 , J28AFROM HYBRID VEHICLE
CONTROL ECU
FROM ENGINE CONTROL MODULE
FROM NAVIGATION ECU
CHARGEOIL SEAT BELT
(
FRONT
PASSENGER' S SEAT) SEAT BELT
(
DRIVER' S SEAT) BRAKEHEAD DOOR
GA
FROM MULTI DISPLAY
V±W

2001 PRIUS (EWD414U)
COMBINATION METER
MALFUNCTION
INDICATOR LAMP
ABS
SRS
TURN L
TURN R
HIGH BEAM OUTPUT CONTROLWAT ER TEMP.
(
HIGH) WAT ER TEMP.
(
LOW) CRUISE
A 17 A 18 A 19 B 5
A 16 A 10 B 4
L L L GR± R B±YL G±R
COMBINATION METERB C10 , C11A
FROM HEADLIGHTS (
*1)
FROM DAYTIME RUNNING
LIGHT RELAY (
*2) FROM TURN SI GNAL
FLASHER RELAY TO ENGINE
CONTROL MODULE
TO BRAKE ECU
TO AIRBAG SENSOR
ASSEMBLY
10A
ACC FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2D 2
GR± R
A B
B C
B B
JUNCTION
CONNECTOR J26
JUNCTION
CONNECTORB J27 , J28AGR ±R
GR± R* 1 : W/O DAYTIME RUNNING LIGHT
* 2 : W/ DAYTIME RUNNING LIGHT

2001 PRIUS (EWD414U)
C10 (A), C11 (B) COMBINATION METER
(A)22±GROUND : Approx. 12 volts with the ignition SW at ON position
(B) 5±GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
(A)21±GROUND : Always approx. 12 volts
(A)14±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A736C11B36H837
B8A36E1036J2637
B9B36F1638J27A37
C10A36G137J28B37
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2A
2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2J31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IP144Instrument Panel Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IH42Right Kick Panel
SERVICE HINTS

2001 PRIUS (EWD414U)
RADIATOR FAN AND CONDENSER FAN
30A
RDI30A
CDS FAN FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
32 51
32 51
1K 752 431
1J 51K51J12 1K 2 1K 3
IE E 5 M
1 2
M
2 1
IE1 7
A E
B A
1 2IE1 111J 45A
ECU±IG
2G 7
FAN NO. 1
RELAYFAN NO. 2
RELAYFAN NO. 3
RELAY
L±W
W±B
L±W
W±G
G±W
V±Y
B±Y
B±Y W± B
V±Y
RADIATOR FAN
MOTOR R 1
A/C CONDENSER FAN
MOTOR A 1
W± B
W±B
V±Y V±Y W±B
W± BA
A
A AA/C SINGLE
PRESSURE SW A 3
JUNCTION
CONNECTOR J 7WATER TEMP. SW W 4
JUNCTION
CONNECTOR J 1JUNCTION
CONNECTORB J27 , J28
A 1A 11
ENGINE CONTROL
MODULE E 7
4
LG
W± B A1J 10
IE1 6
R±W R±W
1
A/C
AMPLIFIER A 8 2 1
RF FAN
3 2

2001 PRIUS (EWD414U)
The radiator fan motor and A/C condenser fan motor operates according to the water temp. SW (Inverter), A/C single
pressure SW, and the A/C system condition. The FAN NO.1 relay, FAN NO.2 relay, FAN NO.3 relay are turned on/off, to
operate the fan motors at low speed (In series), or high speed (In parallel).
1. LOW SPEED OPERATION
When the water temp. SW (Inverter) is on, the radiator fan motor and A/C condenser fan motor operates at low speed.
2. HIGH SPEED OPERATION
When the water temp. SW (Inverter) is on, if the A/C system is operating A/C single pressure SW is on, the radiator fan motor
and A/C condenser fan motor operates at high speed.
A3 A/C SINGLE PRESSURE SW
3±2 : Close above approx. 15.2 kgf/cm2 (220 psi, 1520 kpa)
Open below approx. 12.3 kgf/cm2 (178 psi, 1230 kpa)
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A134J137R135
A334J737W435
A836J27A37
E736J28B37
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A27Engine Wire and Engine Room J/B (Engine Compartment Left)
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1K27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE142Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IE42Cowl Side Panel LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E540Engine Room Main Wire
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
AIR CONDITIONING
50A
HTR FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
23 415
1K 81J13 1A51F3 32 51
1F 4
A A A A
B A
2 1
3 3
25 13
33
1 2
IE4
1 1K 3
IE1 8
IE113
E 5
L
L±R
W±B W± BL±R
W±BV R B±L LG±RL±O
R
R
B±R
L±O
B±L
LG±R
R
W±B B±W
B±R
VB±R
L±Y L±YW±B
W±B
W±B W±B
12 3B
AAAA
A A 4BB
BLOWER MOTOR
LINEAR CONTROLLER B 7
JUNCTION
CONNECTOR J 7 JUNCTION
CONNECTOR J 6
BLOWER
MOTOR B 6
WAT ER PU MP
MOTOR (
A/C) W 2
JUNCTION
CONNECTOR J 1
A/C DUAL PRESSURE SW A 3JUNCTION
CONNECTORB J 2 A , J 3
2
HTR
RELAYCLR MG
RELAY
W±B
LG±R
RA/C W/P
RELAY 1
GNDSI +B VMM
M

2001 PRIUS (EWD414U)
1 2A E
B AB 2 B 3 B 11 A 3
IE1 20 IE1 15 B 10 A1A8
21 IE1 B AA CAC10A
HTR FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2D 37. 5A
ECU±B
2C 5
IK1 4IK15 IE1 4IE15 B 9B18 A7
B A
A A
2D 8
2K 8
ID B 12 1
1 2
C 2 C 1 C 3 C 4 L±O
LG±R
B±L
R
V
L±Y
L±R
W± BW WL±O
R
R
R±G R±GR LG±R
R±W
W
W
W
W V
L±Y
L±R
W±L
BR±W
V±Y
W± B W± L
BR±W W±L
BR ±WB±L
V±Y
W± B W±BL±Y
L±RVV
A
2 4 1 A
A/C MAGNETIC CLUTCH
AND LOCK SENSOR A 2 JUNCTION
CONNECTOR J 6
A/C ROOM
TEMP. SENSOR A10
A/C THERMISTOR A12 WATER TEMP. SW W 4
JUNCTION
CONNECTORB J27 A , J28
JUNCTION
CONNECTORB J24 A , J25JUNCTION CONNECTORB J22 A , J23
FROM FAN
NO. 2 RELAY
A/C AMPLIFIERB A 7 , A 8AA 9, C
BLW PSW WP LOCK SGLOCK CF GND MGC IG +B RF TR SGTR TE SGTE
IE1 11
V±Y
W± BA
JUNCTION
CONNECTOR J11
FROM CONVERTER
A 10
Y
IDH A F
A F
JUNCTION CONNECTORJ27 A

2001 PRIUS (EWD414U)
AIR CONDITIONING
2F 6
A 11 A4D 14 D13 C23
D 3D22 B18
B 4B5IA2 5
1 2
C 5 C 6
M C 20 C18 C19 C22 C21
1 34 18
211
2 12345
L±O
GR±B
GR GR
GR±B
LG
P±G
BR W±G
W±G BR±W W W
W
W
W
W
W
GR±L
W
COMBINATION METER C11
GATEWAY ECU G 1
AMBIENT TEMP. SENSOR A 6 ENGINE CONTROL MODULEC E 8 B , E 9
MPX± MPD1 HRLY MPX+MPX±
MEO2 ACT E2
S5TS TS SGTPI S5TPI TPI AIF AIR MPX+ MPD2 MPX1 MPX2 TAM
MPX+ MP2+ NE ACT
D , E10 A/C SOLAR
SENSOR A11
AIR INLET CONTROL SERVO MOTOR A14 C , A 9 AA 8, A 7 B
A/C AMPLIFIER BODY ECUB 8 A
A 15A 16
IK1 2

2001 PRIUS (EWD414U)
M II1 6II18II17II19 II110 C 17 C15 C16 C14 13 C
M II1 5 II13II14 II12II11 C 7C9C8C10 11 C
12345 12345
W
W
W
W
W
W
W
W
W
W W±R
BR±Y
Y±R
L
BR±R
W
BR±W
GR±L
R
Y±B
S5TP SGTP TP AMC AMH S5TPM SGTPM TPM AOF AOD BSET TSET MSET PIG5 PSG SW
A/CSW
F/ RSW
RDEFSW
FULL A/CPIG LED
A/CLED
F/ RLED
RDEFLED
FULL A/C
AIR MIX CONTROL SERVO MOTOR A15
AIR VENT MODE CONTROL SERVO MOTOR A16 C , A 9 AA 8, A 7 B
A/C AMPLIFIER

2001 PRIUS (EWD414U)
AIR CONDITIONING
30A
HTR2 FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
330A
HTR1
3
33 33
33 33
B 6B 1315 23
25 13 3 1
5 2
3 33 3 2G 810A
GAU GE
3
IE118
IA1 1IA15
ID C , A 9 AA 8, A 7 B
A/C AMPLIFIERP
P±BPR±L R±L
P±B
R±L
G
G±W
B±R W±B
W±B W±B
W±B
JUNCTION
CONNECTOR J11 AA
L±R
HTR1
RELAY HTR2
RELAY HTR3
RELAY11
22
P±B
IE116
IE
W±B
JUNCTION
CONNECTOR J 1 A 1
50A
HTR3
2
HTROHTR2B 1 B 3
B 2 B 4PTC HEATERB P 3 , P 4A A 1
A 2
W±B
G±R
L±Y