2000 TOYOTA CAMRY O2 sensor

5A
STARTER FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1J 3
IJ1 5IF2 5 IG2 5IG317 IG23
IK2 3 C 9B 2
B 5C10 A4C4C11 A3B7C3A5A12
EB 2 1 II2 11A B
B C
IG1 6
11
IG1 7
12 1
IG
R±Y
B±W
GR
B±O Y±B Y±B
O O
R±W
R±L
P±L
Y±G P±L P±L W±B
Y±G
R±W R±W R±W
R±W W±B
B±W
B±WB±W
B±O
R±W
R±W R±W
R±W PARK /NEUTRAL
POSITION SW P 1
OIL PRESSURE
SW O 1
PARKING
BRAKE SW P 3 CLUTCH START SW C 7
WASHER LEVEL
WARNING SW W 1
JUNCTION
CONNECTOR J 2
BRAKE FLUID
LEVEL WARNING SW B 2
JUNCTION
CONNECTOR J11L
LG
G± O
B5
B B6
2B B
BFROM THEFT
DETERRENT ECU SECURITY
OIL
CRUISE
SEAT BELT
ABS
WASHER LEVEL
REAR LIGHTS
BRAKE
BULB
CHECK
RELAY
TRAC OFF
SLIP
O/D OFF
(
A/T)
(
M/T) JUNCTION
CONNE CTOR J29
(
M/T) (
A/T)
P
N
(
*5)
(
*6) (
*3)
(
*4)
(
*4)PKB BRK
A
TO CRUISE
CONTROL ECU
TO INTEGRATION
RELAY
TO ABS ECU
TO ABS AND TRACTION ECU
TO ABS ACTUATOR AND ECU
TO LI GHT
FAI LURE
SENSORTO ABS AND
TRACTION
ECU
GR
(
A/T)
II2 10
GR
B±O
B±O(
*5 A/T)
(
*6 A/T)
TO O/D
MAIN SWJ 7
JUNCTION
CONNECTORB A, J 8
C 8
COMBINA TION METERB A, C 9 C, C10* 1 : 1 MZ± FE
* 2 : 5S±FE
* 3 : W/O DAYTIME RUNNING LIGHT
* 4 : W/ DAYTIME RUNNING LIGHT
* 5 : TMC MADE
* 6 : TMMK MADE
B 4(
*2) A 18(
*1)
A 8(
*1)
B 14(
*2)
B D 6 , A
DAY TIME RUNNING
LIGHT RELAY (
MAIN)

7. 5A
PANEL
1D 510A
ECU±B FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2J 7
B 12 B8
B 13 B9 1G 2IG1 3
W±R W±R
R±L
G LG
W± B
G
G
W± BR±L
R±W(
*3)
(
*4)FROM HEADLIGHT LH, RH
FROM DAYTIME RUNNING
LIGHT RELAY (
MAIN)
TO CENTER AIRBAG
SENSOR ASSEMBLYSRS
HIGH BEAM
* 3 : W/O DAYTIME RUNNING LIGHT
* 4 : W/ DAYTIME RUNNING LIGHT
G
AAA
JUNCTION
CONNECTOR J30
C 8
COMBINATION METERB A, C 9 C, C10
* 5 : TMC MADE
* 6 : TMMK MADE
1W 3

A/C CONTROL ASSEMBLY
1
4 2 415 6
AIR INLET CONTROL
SERVO MOTOR A38
A 2
A/C MAGNETIC CLUTCH
AND LOCK SENSORM5 4 3 2 1
6
7
L±OB±L L±RL L±W
DEF F/ D FOOT B/L FACE
IG
GNDAIR VENT MODE
CONTROL SERVO MOTOR A20
A
B CONTROL
CIRCUIT IK2 7A 20 A 19 A 18 A 17 A 4 B 7 A 6 B 9 B 16 A 3 A 10 B 2 A 26 A 13
L±OB±L L±RL L±W P±L L±YL±B L±B L±B W± BW± L L±WL±Y
L±B W± R
IK2 9
L±W
L±W
B±W
B±W
W± B
L±B
W± B W± BL±B
W± R
W±B W± B
W±R W±L W±LDIODE (
A/C) D 3
L±Y
2
3
B±W B±W
EB1 2 B IG+ MGCR HR LOCK BLW PSW AIF TPI FACE B/L FOOT F/D DEF
A 15
V± W
SPD
TO SPEEDOMETER
[COMB. METER]
A 7 A 23
3 7 Y± G
W± R L±B
RL FROM DEFOGGER RELAY
RDFG
AIR
M
1
W±R
L
A/C DUAL
PRESSURE
SW A 3 IK2 11B A34 A , A35

AIR CONDITIONING (AUTOMATIC A/C)
A/C CONTROL A SS EMBLY
1 2
M3 4 1 2
B±YL P G± R
A/C SOLAR SENSOR A37
AIR MIX CONTROL SERVO MOTOR A39
WARM COOL
A/C ROOM TEMP. SENSOR
A/C EVAPORATOR TEMP. SENSORA36
A13
1 2
2 1
1 2
A/C AMBIENT TEMP. SENSOR A30
IK3 4
IK2 10IK1 1A 14 B 14 B 10 B 13 A 16 B 3 B 6 B 4 A 1 B 5 B 8 A 11 A 8 A 9
A FB D IG1 1
IG1 2
W B±YL P G±R
W LL
W±R
G± Y
L±W
Y
B±O
B±Y
LG±B
V
W± B V LG±BB±Y B±OW± R W± R W± R W± R
W±RY
JUNCTION CONNECTOR
W±R
W± BAMH AMC S5 TP TS SG TR TE TAM IGN AC1 ACT TW GND
TACH ACT THWO
W±R L L
5
W±R W±R
27 25 13 14 W±RL
ENGINE CONTROL MODULE E 8A/C B A34 A , A35
B J27 A , J28
F F
F F A A
AA
W±R
W±R JUNCTION
CONNECTOR J29
JUNCTION
CONNECTOR J 1
W± R
I10 W± R
I 9

AIR CONDITIONING (AUTOMATIC A/C)
5. AIR CONDITIONING OPERATION
The A/C control assembly receives various signals, I.E., the engine RPM from the engine control module, out side air
temperature signal from the A/C ambient temp. sensor, coolant temperature from the engine control module and the lock
signal from the A/C compressor, etc.
When the engine is started and the A/C SW (A/C control assembly) is on, a signal is input to the A/C control assembly.
As a result, the ground circuit in A/C control assembly is closed and current flows from HEATER fuse to TERMINAL 1 of
the MG CLT relay to TERMINAL 2 to TERMINAL 3 of the diode (A/C) to TERMINAL 2 to TERMINAL MGCR of the A/C
control assembly to TERMINAL GND to GROUND, turning the MG CLT relay on, so that the magnetic clutch is on and the
A/C compressor operates.
At the same time, the engine control module. Detects the magnetic clutch is on and the A/C compressor operates.
If the A/C control assembly detects the following conditions, it stops the air conditioning:
*Evaporator outlet air is too low.
*There is a marked difference between the compressor speed and the engine speed.
*The refrigerant pressure is abnormally high or abnormally low.
*The engine speed is too low.
*Rapid acceleration occurs.
A3 A/C DUAL PRESSURE SW
4±1 : Open above approx. 2.0 kgf/cm2 (29 psi, 196 kpa) or 32 kgf/cm2 (464 psi, 3138 kpa)
A2
A/C MAGNETIC CLUTCH AND LOCK SENSOR
4±GROUND : Approx. 3.7 W
A34 (A), A35 (B) A/C CONTROL ASSEMBLY
B±GROUND : Always approx. 12 volts
IG+ ±GROUND : Approx. 12 volts with the ignition SW at ON position
HR ±GROUND : Approx. 12 volts with the ignition SW at ON position and do not turn the blower motor
Below 1 volts with the ignition SW at ON position and turn the blower motor
PSW±GROUND : Below 1 volts with the ignition SW at ON position
AC1±GROUND : Below 1 volts at start the engine, operate the compressor
+ OR MORE volts at start the engine, do not operate the compressor
BLW±GROUND : Below 1.5 volts with the ignition SW on and turn the blower motor
S5±SG :4±6 volts with the ignition SW at ON position
SG±GROUND : Always continuity
AMH±AMC :1.3±1.9 volts with the ignition SW off
AIF±GROUND : Approx. 12 volts with the FRESH SW on
AIR±GROUND : Approx. 12 volts with the RECIRC SW on
FACE±GROUND: Approx. 12 volts with the FACE SW on
DEF±GROUND : Approx. 12 volts with the DEF SW on
GND±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A226 (1MZ±FE)A3630F826 (1MZ±FE)
A326 (1MZ±FE)A3730J131
A1330A3830J1131
A2030A3930J27A31
A3026 (1MZ±FE)B330J28B31
A3330B830J2931
A34A30D330J3231
A35B30E830
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
124Engine Room R/B No.1 (Engine Compartment Left)
SERVICE HINTS

AIR CONDITIONING (MANUAL A/C)
A/C EVAPORATOR
TEMP. SENSOR A13
EC II2 3 II2 1II36 II3 10IK2 9IK210
C 18(
*4)
B 9 B 10 A 10 A 21 A 13 A 15B D
A F 1
4
IK2 2
BF
A 13 9 7 1 4 8 5102 1
BB 12 214
F 4
A F A/C AMPLIFIER A1 2A/C MAGNETIC
CLUTCH AND
LOCK SENSOR A 2
A/C DUAL
PRESSURE SW A 3
JUNCTION CONNECTOR J1 2
JUNCTION CONNE CTOR J23JUNCTION CONNECTOR J2 9 JUNCTION CONNECTOR
ENGINE CONTROL MODULE L±B
B±W
L±Y(
*1)
L±Y(
*2)
G G
(
*1)
G
(
*2)B±W
MGC +BLOCK
GND L±A/C S±A/C IGN AC1 ACT TH SG
W± B
R±W
(
*1)
R±B
R±B
R±W
(
*2)1
2
W±B
R±W
(
*1)
R±B
B±O
(
*1)
B±Y
(
*1)
L±W
(
*1)
W±R
(
*1) L±W
(
*2)
BR
(
*2)
W± R
(
*1) LG±B
(
*1)
L±R
BR
W±L
(
*2) (
*2) (
*2)
LOCK P RS MGC A/C S W TACH A/C ACT THR E2 LOCK INBR
(
*2)BR
(
*2)BR
(
*2)W± L
(
*2)
W±R(
*1)
BR(
*2)W±L
(
*1)
W± L
BR(
*2) W±R(
*1) B±O
(
*1) R±B
(
*2) L±Y
(
*2) G
(
*2)
(
*1) W± B
(
*1) W±B
(
*1) R±B
B
B
JUNCTION
CONNECTOR J 8B J27 A , J28
A 20 A19 A21 A10 B11 B9C19(
*3) B 27 B25 B13(
*1)
B E 7 A , E 8 C, E 9* 1 : 1MZ±FE
* 2 : 5S±FE* 3 : 5S±FE W/ ENGINE IMMOBILISER
* 4 : 5S±FE W/O ENGINE IMMOBILISER

HEATED OXYGEN
SENSOR
(
BANK 1 SENSOR 2)
HEATED OXYGEN
SENSOR
(
BANK 1 SENSOR 1)
HEATED OXYGEN
SENSOR
(
BANK 2 SENSOR 1)
COMBINATION
METER
NOISE FILTER
(
IGNITION)
IGNITER DATA LINK
CONNECTOR 1DATA LINK
CONNE CTOR 2
DATA LINK
CONNE CTOR 3 (
SG)
(
E1)
(
ADJ2)
(
E03)
(
E02)
(
E01)
(
E04)
(
E1)
(
E01)
(
E02)
(
E03)
HEATED OXYGEN
SENSOR
(
BANK 1 SENSOR 1)
HEATED OXYGEN
SENSOR
(
BANK 1 SENSOR 2)
A/C MAGNETIC
CLUTCH AND
LOCK SENSOR COMBINATION
METER
IGNITION COIL AND
IGNITER NO. 1
IGNITION COIL AND
IGNITER NO. 2
DATA LINK
CONNECTOR 1
DATA LINK
CONNECTOR 2
DATA LINK
CONNECTOR 3ENGINE
CONTROL
MODULE
ED ECI 2
I 2 II12
IJ13II36
B B
A C
A C
(
1MZ± FE) (
1MZ± FE)A AA
A
A
A BR
BR
BR
BRBR
BR BR BR
BR
BR
BR
BR
BR
BR
BR
BRBR BR
BR
BRJUNCTION
CONNECTOR J22
BR
(
*2 M/T)
* 1 : TMC MADE
* 2 : TMMK MADE
* 3 : W/ TRACTION CONTROL
* 5 : W/ DAYTIME RUNNING LIGHT
ENGINE
CONTROL
MODULE IJ13
A
A
EC A
EC
I 2
II2 12
B B
B B A C
A CII36
IK210 AAA
A BR
BR
BR
BRBR
BR
BR
BR
BR
BR BR
BR
BR BR
BR BR BR BR
BR
BR BRBR BRBR
BR
(
EXCEPT
CALIFORNIA)
(
CALIFORNIA)
(
CALIFORNIA)
A (
5S±FE)(
5S±FE)
JUNCTION
CONNECTOR J19
JUNCTION
CONNECTOR J23 (
ET)
(
ET)
(
SG)B B
J 7
JUNCTION CONNECTORB A, J 8
BR
(
CALIFORNIA)
BR
(
CALIFORNIA) BR
(
CALIFORNIA)(
E05)
(
E04) J2 6
JUNCTION
CONNECTOR
(
EOM)
BR
A
J 7
JUNCTION
CONNECTORB A, J 8(
EOM)
BR
(
CALIFORNIA) BR
BR
B BB
B
* 4 : W/O TRACTION CONTROL
(
E XCEPT CALIFORNIA)

I GROUND POINT
CRUISE CONTROL
ECU
TRACTI ON OFF SW
DATA LINK
CONNECTOR 3
POWER RELAY
INTEGRA TION RELAY
NOISE FILTER POWER WINDOW
MASTER SW AND
DOOR LOCK
CONTROL SW LHCRUISE CONTROL
ACTUATOR
CRUISE CONTROL S W
[COMB. SW]
LIGHT CONTROL AND
DIMMER SW
[COMB. SW]
KEY INTERLOCK
SOLENOID
UNLOCK WARNING SW
CENTER AIRBAG
SENSOR ASSEMBLY
WIPER AND WASHER SW
[COMB. SW]
BRAKE FLUID LEVEL
WARNING SW
A/C AMPLIFIERHEATER CONTROL SW
AIR VENT MODE
CONTROL SERVO MOTOR BLOWER SW BLOWER RESISTOR
REAR WINDOW
DEFOGGER SW
CIGARETTE LIGHTER TURN SIGNAL FLASHE R
ST RELAY DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT L H
DOOR KEY LOCK AND
UNLOCK SW FRONT LH
REMOTE CONTROL
MIRROR LH
CENTER AIRB AG
SENSOR ASSEMBLY
POWER OUTLET
VANITY LIGHT LH
VANITY LIGHT RH
MOON ROOF CONTROL
SW AND RELAY
PERSONAL LIGHT
MOON ROOF MOTOR
AND LIMIT SWA A
A A
A A
A A
A A B A
B A
B A
1J 81M31N1
A A
A
A
A
A
A
A
A A A
1N3
1V4
1F31G 7
1V 3IE1 20
IG IE B 2
B 2
B 3
B 2
BM IIANOISE FILTER 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(
*2)
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B
W± B(
*6)
W± B W± B
W±B W± B W±B W± B
W± B
JUNCTION CONNECTOR J38
JUNCTION
CONNECTOR J1 1
W±BW±B
W± B (
*3)
B 3 : * 6
B 2 : * 7
(
E)
(
E) (
CG)
(
E1)
(
E2)
W±B
(
*1 *6)
W±B
DAYTIME RUNNING
LIGHT RELAY (
MAIN) A A
W±B
(
*5)
(
1 MZ± FE MANUAL A/ C)2K9
I 1 TRANSPONDER KEY
AMPLIFIERW± B
W±B
W±B
W±B W±B W±B W±B W±B 1J 7
W±B
W± B
W±B
J 7
J UNCTION
CONNECTORB A, J 8 POWER WINDOW
MASTER SW AND
DOOR LOCK
CONTROL SW LH
DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT L H
DOOR KEY LOCK AND
UNLOCK SW FRONT LH
REMOTE CONTROL
MIRROR LHW±B(
*1)
W±B
W±B
W±B
W±B (
E)
(
E)
B13 (
*1)
(
*1)
(
*1) (
*1)
(
*2)
(
*2)
(
*2)
(
*2)(
*1)
W± B
(
*2)
A/C CONTROL
ASSEMBLYW± B
(
*9) (
*6)
(
*6)(
MANU AL A/ C)
(
MANU AL A/ C)
(
MANU AL A/ C)BLOWER RESISTOR
(
LOW SPEED)
A/C BLOWER MOTOR
LINEAR CONTROLLER I 7 W±B W±BW± B
(
*9)(
*9) (
*9)
ABS ECU (
GND)
(
GND2) AW±B(
*1)
W±B
(
*1)