TOYOTA CAMRY 2000 Service Repair Manual

ENGINE CONTROL (1MZ±FE)
2. CONTROL SYSTEM
*SFI system
The SFI system monitors the engine condition through the signals, which are input from each sensor (Input signals (1) to
(12) ). The best fuel injection volume is decided based on this data and the program memorized by the engine control
module, and the control signal is output to TERMINALS #10, #20, #30, #40, #50 and #60 of the engine control module
to operate the injector (Inject the fuel). The SFI system produces control of fuel injection operation by the engine control
module in response to the driving conditions.
*ESA system
The ESA system monitors the engine condition through the signals, which are input to the engine control module from
each sensor (Input signals from 1, 3, 4, 12). The best ignition timing is decided according to this data and the memorized
data in the engine control module and the control signal is output to TERMINALS IGT1, IGT2 and IGT3. This signal
controls the igniter to provide the best ignition timing for the driving conditions.
*Heated oxygen sensor heater control system
The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of
exhaust emissions is low), and warms up the heated oxygen sensor to improve detection performance of the sensor.
The engine control module evaluates the signals from each sensor (Input signals from 1, 4, 9, 10), current is output to
TERMINALS HTL, HTR and HTS, controlling the heater.
*Idle air control system
The idle air control system (Rotary solenoid type) increases the RPM and provides idle stability for fast idle±up when the
engine is cold, and when the idle speed has dropped due to electrical load and so on, the engine control module
evaluates the signals from each sensor (Input signals from 1, 4, 5, 8, 9), current is output to TERMINALS RSO and RSC
to control idle air control valve.
*EGR control system
The EGR control system detects the signal from each sensor (Input signals from 1, 4, 9, 10), and outputs current to
TERMINAL EGR to control the VSV (EGR).
The EGR valve position sensor is mounted on the EGR valve. this sensor converts the EGR valve opening height into a
voltage and sends it to the engine control module as the EGR valve position signal.
*ACIS
ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in
accordance with the driving conditions to control the intake manifold length in two stages for increased engine output in
all ranges from low to high speeds.
The engine control module judges the engine speed by the signals ( (4), (5) ) from each sensor and outputs signals to
the TERMINAL ACIS to control the VSV (Intake air control).
3. DIAGNOSIS SYSTEM
With the diagnosis system, when there is a malfunction in the engine control module signal system, the malfunctioning
system is recorded in the memory.
4. FAIL±SAFE SYSTEM
When a malfunction occurs in any systems, if there is a possibility of engine trouble being caused by continued control
based on the signals from that system, the fail±safe system either controls the system by using data (Standard values)
recorded in the engine control module memory or else stops the engine.

E5 ENGINE COOLANT TEMP. SENSOR
1±2 : Approx. 15.04 kW (±20C, ±4F)
Approx. 5.74 kW (0C, 32F)
Approx. 2.45 kW (20C, 68F)
Approx. 1.15 kW (40C, 104F)
Approx. 0.584 kW (60C, 140F)
Approx. 0.318 kW (80C, 176F)
E7 (A), E8 (B), E9 (C), E10 (D), E11 (E)
ENGINE CONTROL MODULE
Voltage at engine control module wiring connector
BATT±E1 : Always 9.0±14.0 volts
+B±E1 :9.0±14.0 volts (Ignition SW at ON position)
VC±E2 : Always 4.5±5.5 volts (Ignition SW at ON position)
VTA1±E2 :0.3±0.8 volts (Ignition SW on and throttle valve fully closed)
:3.2±4.9 volts (Ignition SW on and throttle valve fully open)
VG±E2G :1.1±1.5 volts (Engine idling and A/C SW OFF position)
THA±E2 :0.5±3.4 volts (Engine idling and intake air temp. 20°C, 68°F)
THW±E2 :0.2±1.0 volts (Engine idling and engine coolant temp. 80°C, 176°F)
IGF±E1 :4.5±5.5 volts (Ignition SW at ON position)
Pulse generation (Engine idling)
G22+±NE± : Pulse generation (Engine idling)
NE+±NE± : Pulse generation (Engine idling)
NSW±E1 :9.0±14.0 volts (Ignition SW on and other shift position in P or N position)
Below 3.0 volts (Ignition SW on and shift position in P or N position)
SPD±E1 : Pulse generation (Ignition SW on and rotate driving wheel slowly)
TC±E1 :9.0±14.0 volts (Ignition SW at ON Position)
W±E1 : Below 3.0 volts
A/C±E1 : Below 2.0 volts (Engine idling and A/C SW on)
9.0±14.0 volts (A/C SW off)
ACT±E1 :9.0±14.0 volts (Engine idling and A/C SW on)
Below 2.0 volts (A/C SW off)
ACIS±E01 :9.0±14.0 volts (Ignition SW at ON position)
STA±E1 :6.0 volts or more (Engine cranking)
THG±E2 :4.5±5.5 volts (Ignition SW at ON position)
ELS±E1 :7.5±14.0 volts (Taillight SW at ON position)
0±1.5 volts (Taillight SW at OFF position)
ELS2±E1 :7.5±14.0 volts (Defogger SW at ON position)
0±1.5 volts (Defogger SW at OFF position)
EGR±E01 :9.0±14.0 volts (Ignition SW at ON position)
FC±E1 :9.0±14.0 volts (Ignition SW at ON position)
0±3.0 volts (Engine idling)
EVP1±E01 :9.0±14.0 volts (Ignition SW at ON position)
CF±E1 :9.0±14.0 volts (Electric cooling fan is operating on high speed)
0±2.0 volts (Electric cooling fan is operating on low speed or off)
TACH±E1 : Pulse generation (Engine idling)
TPC±E1 :9.0±14.0 volts (Ignition SW on and disconnect the vacuum hose from the vapor pressure sensor)
PTNK±E1 :3.0±3.6 volts (Ignition SW at ON position)
1.3±2.1 volts (Ignition SW on and apply vacuum 2.0 kpa (15.0 mmHg, 0.6 in.Hg)
STP±E1 :7.5±14.0 volts (Ignition SW on and brake pedal depressed)
Below 1.5 volts (Ignition SW on and brake pedal released)
SIL±E1 : Pulse generation (During transmission)
RSC, RSO±E01 :9.0±14.0 volts (Ignition SW on and disconnect E 7 of engine control module connector)
KNKL, KNKR±E1 : Pulse generation (Engine idling)
HTS, HTL, HTR±E03 :9.0±14.0 volts (Ignition SW at ON position)
0±3.0 volts (Engine idling)
OXS, OXL, OXR±E1 : Pulse generation (Maintain engine speed at 2500 rpm for two minutes after warning up)
IGT1, IGT2, IGT3±E1 : Pulse generation (Engine idling)
#10, #20, #30, #40, #50, #60±E01 :9.0±14.0 volts (Ignition SW at ON position)
Pulse generation (Engine idling)
SERVICE HINTS

ENGINE CONTROL (1MZ±FE)
I8, I9, I10, I11, I12, I13 INJECTOR
2±1 : Approx. 13.8 W
CIR OPN RELAY [R/B NO.1]
3±5 : Closed with starter running
EFI RELAY [ENGINE ROOM J/B NO.2]
3±5 : Closed with ignition SW at ON or ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A12C30H830J2431
A2826 (1MZ±FE)H326 (1MZ±FE) J2631
A2926 (1MZ±FE)H426 (1MZ±FE)J27A31
A34A30I127 (1MZ±FE)J28B31
A35B30I827 (1MZ±FE) J2931
C126 (1MZ±FE)I927 (1MZ±FE)J35A31
C226 (1MZ±FE) I1027 (1MZ±FE)J26B31
C730I1127 (1MZ±FE)J4032
C9B30I1227 (1MZ±FE)K127 (1MZ±FE)
C10C30I1327 (1MZ±FE)K227 (1MZ±FE)
D126 (1MZ±FE) I1630M227 (1MZ±FE)
D530J331P127 (1MZ±FE)
E126 (1MZ±FE) J431P227 (1MZ±FE)
E226 (1MZ±FE) J7A31S631
E526 (1MZ±FE)J8B31T227 (1MZ±FE)
E7A30J9A31T331
E8B30J10B31U131
E9C30J1131V127 (1MZ±FE)
E10D30J1231V227 (1MZ±FE)
E11E30J1531V427 (1MZ±FE)
F4A26 (1MZ±FE)J1831V527 (1MZ±FE)
F6C26 (1MZ±FE)J2031V627 (1MZ±FE)
F1432 J2231V727 (1MZ±FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
124Engine Room R/B No.1 (Engine Compartment Left)
224Engine Room R/B No.2 (Near the Battery)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1C20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1K
1M20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1R
()
1W
2A
2C22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2F
gg(g)
2J
2K22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
2L
g(g )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
EB136 (1MZ±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
EC136 (1MZ±FE)Engine Wire and Sensor Wire (Head Cover RH)
ES136 (1MZ±FE)Engine Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
ID140Floor Wire and Cowl Wire (Left Kick Panel)
IG340Instrument Panel Wire and Cowl Wire (Under the Blower Motor)
II1
II242Engine Wire and Cowl Wire (Under the Blower Motor)
II3
g()
IJ142Engine Wire and Instrument Panel Wire (Under the Blower Motor)
IK342Engine Room Main Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EB36 (1MZ±FE)Left Radiator Side Support
EC36 (1MZ±FE)Surge Tank RH
ED36 (1MZ±FE)Rear Side of the Surge Tank
IG40Instrument Panel Brace LH
IH40Instrument Panel Brace RH
BL44Under the Left Center Pillar
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I142Cowl WireI342Cowl WireI242Engine WireI542Cowl Wire

ENGINE CONTROL (1MZ±FE)
2 1
342 1
34
1212

14












15
XX 3
X
X
X8 X X

12 X XX

XXX X


X12
X 4 X
1
7


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X7 X 5 4 XXX
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10 X X 13 14 X













14

15


8 7 6 5

2



ORANGE DARK GRAY DARK GRAY
BLACK BLACK
BLACK
D5DARK GRAY
C7
C9 (B)
(TMMK Made) BROWN
A12 (C) A28 A29
C1 C2
C10 (C)
D1E1 A34 (A)
A35 (B)
C9 (B)
(TMC Made) (TMMK Made)
C10 (C)(TMC Made) BROWN

45
2 1
3412312122 1
342 1
34
11
1
16 14 13 12 11 8
24 22 20 172
10 9
19 18 21X
23 34567X
16 14 13 12 11 X
24 22 X 172
10 9
19 18 XX
23 34567
21 17 16 15
10
31 27
2213 11
25 X18
28

29

30 12
24 12 34X6



21 17 16 15
10
31 27
2213 11
25 X18
28

29

30 12 12 34X6



1232 1
123XX 7
89X11X 15
16 17 19 X6
13 14
20 21 18X

XX 9


13 X X
20 22
X X
16 X
25 X X

X
X8
X
27XXX45X
XXX1011X
13 X X 16 X
F14
DARK GRAY GRAY GRAY GRAYH8 I1 I8 I9 F4 (A) F6 (C)
H3 H4DARK GRAY DARK GRAY
E10 (D) E11 (E)(California)E10 (D)(Except California) BLACK (California)
E11 (E)(Except California) BLACKBLACK DARK GRAY
E7 (A) E8 (B) E9 (C) E2 E5
14
24
12121212
X



X678 GRAY GRAY GRAY
I16 I10 I11 I12 I13GRAY

ENGINE CONTROL (1MZ±FE)





BB BB














B



BBBAABB




EE F F

BBCC
DDEE F F
B B









B


BB


DD D



AA
AAAA

A A A








B A
AAB BB
AAA AA
AAAAAAAAAA AA
AAAAAAAAA AA
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CC






CCX X






DDDX
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B B BCCC


BB









AAAAAA
B B BCCC
J26 J27 (A) J28 (B)
J29
(Hint : See Page 7)(Hint : See Page 7) (Hint : See Page 7) (Hint : See Page 7)BLACK
J11BLACK
BLACK ORANGE
J20 J22
J24
(Hint : See Page 7)(Hint : See Page 7)(Hint : See Page 7)
(Hint : See Page 7)(Hint : See Page 7) (Hint : See Page 7)
(Hint : See Page 7) (Hint : See Page 7)
J10 (B) J12
J15 J18J3
BLACK GRAY GRAY
BLACK
(Hint : See Page 7)(Hint : See Page 7) (Hint : See Page 7) (Hint : See Page 7)
(Hint : See Page 7)J4 J7 (A) J8 (B)
J9 (A)
AA














CC







J35 (A) J36 (B)
(Hint : See Page 7) (Hint : See Page 7)
AA
AAAA
J40
(Hint : See Page 7)
5 4 3 2 11X

56






11GRAYBLACK
BLACK
M2 P1P2DARK GRAY DARK GRAYK1 K2

1

2

123
XXXX6

X



12
12312
123
121212 BLUE BLACK
T3 U1
BLACK BROWN
S6 T2
V1
V2 V4BLACK
BLUE BROWN BLUE
V5 V6 V7

ENGINE CONTROL (5S±FE)
11
11 23 15
CIR OPN
RELAY 5A
IGN
30A
AM2 1K 5
2L 41K 31W7
1C 8 1B 5
2A 1
BL ID1 7EB1 4 EB1 5 II3 12
1 2
1 2
1 2
1 2 C 1
A 176
8 AM2 IG2
ST2
B B B B
5 4 B
G± R
B±W(
*1)
B±R(
*1)
W
Y B±R B±RR
B±R
R
L±B L±B L±B W±B W±BG± RB±R B±R B±RW± R W±R B B±G
B±R B±R B±R B±R
WY RL
IGNITION SW
JUNCTION
CONNE CTOR
FUEL
PUMP
INJE CTOR NO. 1
INJE CTOR NO. 2
INJE CTOR NO. 3
INJE CTOR NO. 4
I16
J21
F1 4
I 8
I 9
I10
I11
BATTERY FL MA IN
3. 0W
JUNCTION
CONNECTOR J40 A
G± R
B±RR
L
B±R
B±W
(
*1)
II4 6
B±W
(
*1)B±W
(
*1)
B±R
(
*1)(
*2)
(
*2)
F 4
FUSIBLE
LINK BLOCKC A, F 6IK1 7I 1
I 3B±R
B±R
B±R B±R B±R
(
*2)
(
*2)
(
*1)
(
*1)
M

23 15P
N5
6
I 2 15A
EFI FROM POWER SOURCE
SYSTEM (
SEE PAGE 50)
EBEC
5A STARTER
1K 4
2K 7
2F 42C10
B EBB
A 14 D7A1C9C10 C17 C 23 C22 A 12A B
A 1A22 A11 1J 3
4 1 4 1
A2 3 3 2 B
B±Y Y W B±R(
*1) B±W(
*1) G±RB± RR
B±Y
B±W
B±O B±W
B± Y
B±Y
Y± R W±R W±RBB± Y B±Y
B±WB± Y
B±YB±R
W±B W±B
B±W
B±W
GR
B±O B±O GR(
*3)
GR BR B±RBRG±R
B±W
B± R
W
Y
W±R
B
FC #40 #30 #20 #10 IGT1 IGF IGT2+B BATT NSW STA(
*4 M/T)
(
*4 A/T) (
*4)
(
A/ T)
(
A/ T)
(
M/T)PARK/NEUTRA
LPOSITION SW
JUNCTION
CO NNE CTOR EFI
RE LA Y
J29P 1
* 1 : W/ ENGINE IMMOBILISER SYSTEM
* 2 : W/O ENGINE IMMOBILISER SYSTEM* 3 : TMC MADE
* 4 : TMMK MADEJUNCTION
CONNECTOR
IGNITION COIL AND
IGNITER NO. 1
IGNITION COIL AND
IGNITER NO. 2
J19
I 3
I 4
A A
BRB±R
2 1
CLUTCH START SW C 7II2 10 II2 11
E 3B±Y
BB
B JUNCTION
CO NNE CTOR J25
B± RIGTIGF IGFIGT
+B GND GND+B
II3 13
B±R B± RC 12 C 11 MREL IGSW
R
LA 14 C24 C25 C11 C12 C3 C 20 C19(
*1)
(
*2)
R (
*1)
L (
*1)
B±Y
II3 9
(
A/ T) (
*3 A/T)
A EAEABB B±W(
*2)
(
*1)
2J8
2J2
A 11 B± Y
A 12 A2A22(
*1)
(
*2)(
*1)
(
*2)
J27
JUNCTION CONNECTORB A, J28
E 7
ENGINE CONTROL MODULEB A, E 8 C, E 9 D, E10 2C 5W±B W±B
A BB CBC GR(
*3 M/T)J 7
JUNCTION
CONNECTORB A, J 8 B±W B±W
B±W
(
A/T)