1994 TOYOTA CAMRY transmission

88
ENGINE CONTROL (5S±FE)
THIS SYSTEM UTILIZES AN ENGINE CONTROL MODULE (ENGINE ECU (M/T), ENGINE AND ELECTRONIC CONTROLLED
TRANSMISSION ECU (A/T)) AND MAINTAINS OVERALL CONTROL OF THE ENGINE, TRANSMISSION AND SO ON. AN OUTLINE OF THE
ENGINE CONTROL IS EXPLAINED HERE.
1. INPUT SIGNALS
(1) ENGINE COOLANT TEMP. (WATER TEMP.) SIGNAL SYSTEM
THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. AND HAS A
BUILT±IN THERMISTOR WITH A RESISTANCE WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP. (WATER TEMP.)
THUS THE ENGINE COOLANT TEMP. (WATER TEMP.) IS INPUT IN THE FORM OF A CONTROL SIGNAL TO TERMINAL THW OF
THE ENGINE CONTROL MODULE (ECU).
(2) INTAKE AIR TEMP. SIGNAL SYSTEM
THE INTAKE AIR TEMP. SENSOR (IN±AIR TEMP. SENSOR) IS DETECTS THE INTAKE AIR TEMP., WHICH IS INPUT AS A
CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE (ECU).
(3) OXYGEN SENSOR SIGNAL SYSTEM
THE OXYGEN DENSITY IN THE EXHAUST GASES IS DETECTED AND INPUT AS A CONTROL SIGNAL TO TERMINAL OX1 AND
OX2 OF THE ENGINE CONTROL MODULE (ECU).
(4) RPM SIGNAL SYSTEM
CRANKSHAFT POSITION AND ENGINE RPM ARE DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR.
CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINALS G+ AND G2 (CALIFORNIA), OF THE ENGINE
CONTROL MODULE (ECU), AND RPM IS INPUT TO TERMINAL NE+.
(5) THROTTLE SIGNAL SYSTEM
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE, WHICH IS INPUT AS A CONTROL
SIGNAL TO TERMINAL VTA OF THE ENGINE CONTROL MODULE (ECU), OR WHEN THE VALVE IS FULLY CLOSED, TO
TERMINAL IDL
(6) VEHICLE SPEED SIGNAL SYSTEM
THE VEHICLE SPEED SENSOR (SPEED SENSOR), INSTALLED INSIDE THE COMBINATION METER, DETECTS THE VEHICLE
SPEED AND INPUTS A CONTROL SIGNAL TO TERMINAL SPD OF THE ENGINE CONTROL MODULE (ECU).
(7) PARK/NEUTRAL POSITION SW (NEUTRAL START SW) SIGNAL SYSTEM (A/T)
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION ARE IN NEUTRAL AND
PARKING OR NOT, AND INPUTS A CONTROL SIGNAL TO TERMINAL NSW OF THE ENGINE CONTROL MODULE (ECU).
(8) A/C SW SIGNAL SYSTEM
THE A/C AMPLIFIER INPUTS THE A/C OPERATIONS TO TARMINAL ACA OF THE ENGINE CONTROL MODULE (ECU) AS A
CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE (ECU). WHEN THE IGNITION SW
TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE (ECU) START±UP POWER SUPPLY IS APPLIED TO TERMINALS
+B AND +B1 OF ENGINE CONTROL MODULE (ECU) VIA EFI MAIN RELAY. THE CURRENT FLOWING THROUGH THE IGN FUSE
FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL MODULE (ECU).
(10) INTAKE AIR VOLUME SIGNAL SYSTEM
INTAKE AIR VOLUME IS DETECTED BY THE MANIFOLD ABSOLUTE PRESSURE SENSOR (VACUUM SENSOR) (FOR MANIFOLD
PRESSURE) AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL PIM OF THE ENGINE CONTROL MODULE (ECU).
(11) STA SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING, THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING CRANKING IS
DETECTED AND THE SIGNAL IS INPUT INTO TERMINAL STA OF THE ENGINE CONTROL MODULE (ECU) AS A CONTROL
SIGNAL.
(12) ENGINE KNOCK SIGNAL CIRCUIT
ENGINE KNOCKING IS DETECTED BY KNOCK SENSOR AND THE SIGNAL IS INPUT INTO TERMINAL KNK AS A CONTROL
SIGNAL.
(13) ELECTRICAL LOAD SIGNAL SYSTEM
THE SIGNAL WHEN SYSTEMS SUCH AS THE REAR WINDOW DEFOGGER, HEADLIGHTS, ETC. WHICH CAUSE A HIGH
ELECTRICAL BURDEN ARE ON IS INPUT TO TERMINAL ELS AS A CONTROL SIGNAL.
SYSTEM OUTLINE

90
ENGINE CONTROL (5S±FE A/T AND CALIFORNIA M/T)
CB
IG2
ACC
IG1 ST2AM2
AM1
ST1
7 9
1 2
1 2
1 2
1 2 E20
E20
E20I20
I23 E20 E18 E18 E17E17
I18
EBA 1A 12
A 22 C 11 C12A23 C 7 IP 3 12
1 2
2 1 2D 2
2B 22C3
W±B
B±W B±WY
B±W
Y WW±R
W±R
W±R
W±RW±R W±R W±R W±R B±O
B±W
B±O
W±G
B±O B±O
B±O B±O B±OLG
G W±L W±B B±W
W±R
B±O B±O B±O W±R
B±O B±O B±O
B±O
7. 5A
IGN
IP1 18
B±O
#20 #10 NSWBATT EGRISCV +B 15A
EFI
EFI MAIN
RELAY
VSV
(
FOR EGR) VSV
(
FOR A/C IDLE±UP)
E NGINE CONTROL MODULE(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION ECU)(
A/T)
INJE CTOR NO. 1
INJE CTOR NO. 3
INJE CTOR NO. 2
INJE CTOR NO. 4 I4
I5
I6
I7
E7 , E8 , E10C
V2 V1
W±R
I12
IGNITION SW
C 9C10 31 2
B±O
G±Y G±R
ISCC ISCO
IDLE AIR CONTROL
VALVE
(
ISC VALVE) I1
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
34 13
IP1 11
IP1 9
W±R
B±O (
*4) (
*5)
TO PARK/NEUTRAL POSITION SW
(
NEUTRAL STA RT SW) 2D 4IP116
W±R
I2 C 24#40
I18C 25#30
W W(
*1)
(
*2)
(
*2)
Y
(
*2)
Y
(
*1)
R±B(
*1)
(
*2)
Y(
*1)
W(
*2)
W(
*1)
R±L(
*1)
B±W
(
*5)
E17
B±O B±O
(
*2)
(
*1) (
*1)
B±O
(
*1)
12
25(
*1)
(
*2)
(
*1)
(
*2)
B±W
W
(
*2)
(
EX. CALIFORNIA M/T)
(
EX. CALIFORNIA M/T)B E11 , E12CA,E14E NGINE CONTROL MODULE(
ENGINE ECU)(
M/T)
I21
B±W
(
*4)
B±W
1A 61G 8
1D 9
1G 61E 51A14

91
*
2 : EX. CALIFORNIA
* 4 : FOR CANADA IN TMM MADE * 1 : CALIFORNIA
* 5 : EX. * 4
B C
I18B 11 B 1B12
R
B
L R
VC VTA IDL
THROTTLE POSITION
SENSOR T11 2
1 2
1 2 E20
E20
E18 E17 E17 1234
2 3
32 112
A 13 A2C 18 C 17 C 5 C 4
B 2 A
4B3B10 B16 B9 PIM THW THA THG E21 E2 NE NE±(
*2)
G± G+B B± O W±R W±R
B±O
B± O
BR BR BR
B±Y
BR BR
BR
BR
BR
BRGR L±BLGB±R G G
W± R W±R
R
L
B
Y
B±O
D6
I3
D2
E7 ,E8 , E10 +B1 ELSW± R
NE+ NE± G± G+(
*2)
VC E2PIM
(
*2)
M1
E4
I10
E1
MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
VACUUM SENSOR)
ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
INTAKE AIR TEMP. SENSOR
(
IN±AIR TEMP. SENSOR)
EGR GAS TEMP.
SENSOR
ENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)(
A/T)
B
DIODE
(
FOR IDLE±UP)
IGNITION COIL
DISTRIBUTOR FROM
I18 E18
4321BR
BR I18
L
L FROM CRUISE
CONTROL ECU 1
P
E19
C 3C20 534
12
W± R
WBW±R
B
W±R
(
SHIELDED)
IGF IGT COIL± +B IG±
IGF IGTIGNITER I2
TO TACHOMETER
[COMB. METER]
C 8
FPU 1 2 B±O
(
*1)
B±O
(
*1) B±RV3
VSV
(
FOR PRESSURE UP)
1342G2(
*1)
(
*1)
(
*2)
NE G2 G± G1(
*1)
B E11 , E12CA,E14ENGINE CONTROL MODULE(
ENGINE ECU)(
M/T) ONE BODY ASSEMBLY
EX. CALIFORNIA
R
BRB±R
1D 1415A
TAIL
1A 1010A
MIR±HTR
3C 53D 5
POWER SOURCESYSTEM(
SEE PAGE 64)

92
ENGINE CONTROL (5S±FE A/T AND CALIFORNIA M/T)
CB
A
321
C
1 78
C
A 6
B 3
A 21 A10 C13 C26 B13A 5
EDI13G±R R±L R±L
G±R
G±R
Y±G G±WBR LG±B
B±Y
W W±B W±B
W±R
B±O
B±O
B
G±R B±O B±O W±R
R±W G±WY±G G±R
E1 TE2 TE1
WW
DATA LINK CONNECTOR 2
(
TDCL) FROM CE SYSTEM
(
SEE P
JUNCTION
CONNECTOR
MALFUNCTION INDICATOR
LAMP(
CHECK E NG INE
WARNING LIGHT)
[COMB. METER]
ACT ACA E01 E02 KNKENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)(
A/T)
ACT ACA
KNOCK
SENSOR A/C AMPLIFIER A1 0K1 E7 ,E8 ,E10
A
C9 , C10
J1D3
B
(
SHIELDED)
(
SHIELDED)
E16
O2
OXYGEN SENSOR
(
SUB)
1E15BR
BR
5TT
BR±B IP3 11 IP314
A 9 23
4 1
512IP3 2
SPEED
LGP G±B
G V±Y V±Y
R±L
R±L
SP1COMBINATION
METER C8
VEHICLE
SPEED SENSOR
(
SPEED SENSOR) V5
B
BR I13
G±R
G±R(
*5)
(
*4)
R±L
BR BR
1 2BR 7
R±W
ENG
BR
R±L
I18
R±L TO PARK/NEUTRAL POSITION
SW(
NEUTRAL START SW)
TO GENERATOR(
ALTERNATOR)
R±L
G±R(
*5)(
*4)
(
*3)
B E11 , E12CA,E14
ENGINE CONTROL MODULE(
ENGINE ECU)(
M/T) G±R
(
*
4)
1B 6 10A
GAUGE
1D6
3D 73D19
3D 18
3D 22
3D 10
3D 3
3D 12
POWER SOUR
AGE 64)

93
* 1 : CALIFORNIA
*
2 : EX. CALIFORNIA
* 3 : EX. CALIFORNIA M/T
*
5 : EX.*
4 *
4 : FOR CANADA IN TMM MADE
CB
17 8 9 13 4 15
146 212 1
23 IP119
IP115
IP313
IP11
IP3196 61
666
M
5 4
E17I18 I18 I18
I18
I18I18 I18 I18 I18
IP3 15IP1 4
BX1 4IJ 1 16
BX1 5
BL IG 2 1
EC B 7B15 B14 B8A11
A
14 B5B6A143
BR±B
GR
G±W
R±W B±O
B±W B±WB±O L±B
G±R
W±B W±B W±BW±B W±B L±B L±BBRR±W G±WGR BR±B
L±BBR R±LW
B±O W
R±L
BRR±LBR BR BR BR
W
G±R
L±B
W±R
B±O
B±O
G±R
BR±B
Y±G
G±W
R±W
(
SHIELDED)G±RL±B
R±LW
BR BR±B
GR
G±W
R±WTT TE1 TE2 VF1 OX1 OX2 E1
B±O B±W
B±W
(
SHIELDED) BR (
SHIELDED) (
SHIELDED) (
SHIELDED)
W±R
D1
E1 OX2 OX1 FCTT TE1 TE2 VF STAW+B FP
E7 ,E8 ,E10
N1
F15
O3FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
10A
STARTER
DATA LINK CONNECTOR 1
(
CHE CK CONNE CTOR)
CIRCUIT
OPENING
RELAY
NOISE FILTER
(
FOR IGNITION SYSTEM)
OXYGEN SENSOR(
MAIN)FUEL
PUMP ENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION ECU)(
A/T)
C
E16 BR1 B
BR BRBR 19
IG±
BR BR
IP316
BR
BR
ED4
I18
BR(
SHIELDED) (
*3)(
*3)
(
*3) (
*3)
B E11 , E12CA,E14
ENGINE CONTROL MODULE(
ENGINE ECU)(
M/T)
3D 2
3C 2
3B20
3A 13
1C 113C 18
1M 1

94
ENGINE CONTROL (5S±FE A/T AND CALIFORNIA M/T)
E 7(C), E 8(B), E10(A) ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU) (A/T)E11(C), E12(B), E14(A) ENGINE CONTROL MODULE (ENGINE ECU) (M/T)
VOLTAGE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTOR
BATT ± E1: ALWAYS 9.0±14.0 VOLTS
+B ± E1:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1 ± E1:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL ± E2:9.0±14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
VC ± E2:4.5± 5.5 VOLTS (IGNITION SW AT ON POSITION)
VTA ± 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 OPEN)
PIM ± E2:3.3± 3.9 VOLTS (IGNITION SW AT ON POSITION)
#10, #20 ± E01, E02:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION) (EX. CALIFORNIA)
#10, #20,
#30, #40 ± E01, E02:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION) (CALIFORNIA)
THA ± E2:0.5± 3.4 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, 68°F)
THW ± E2:0.2± 1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, 176°F)
STA ± E1:6.0±14.0 VOLTS (ENGINE CRANKING)
IGT ± E1: PULSE GENERATION (ENGINE CRANKING OR IDLING)
W ± E1:9.0±14.0 VOLTS (NO TROUBLE AND ENGINE RUNNING)
ACT ± E1:9.0±14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACA ± E1:7.5±14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
TE1 ± E1:9.0±14.0 VOLTS (IGNITION SW ON)
NSW ± E1:0± 3.0 VOLTS (IGNITION SW ON AND PARK/NEUTRAL POSITION SW (NEUTRAL START SW)
POSITION P OR N POSITION)
9.0±14.0 VOLTS (IGNITION SW ON AND EX. PARK/NEUTRAL POSITION SW
(NEUTRAL START SW) POSITION P OR N POSITION)
RESISTANCE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTORS
(DISCONNECT WIRING CONNECTOR)
IDL ± E2: INFINITY (THROTTLE VALVE OPEN)
2.3 KW OR LESS (THROTTLE VALVE FULLY CLOSED)
VTA ± E2:3.3 ±10.0 KW (THROTTLE VALVE FULLY OPEN)
0.2 ± 0.8 KW (THROTTLE VALVE FULLY CLOSED)
VC ± E2:3.0 ±7 0 KW
THA ± E2:2.0 ±3.0 KW (INTAKE AIR TEMP. 20°C, 68°F)
THW ± E2:0.2 ±0.4 KW (COOLANT TEMP. 80°C, 176°F)
G1, NE ± G±:0.17±0.21 KW
ISCC, ISCO± +B, +B1:19.3±22.3 W
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1032E11A32J 133
C 832E12C32K 131
C 9A32E14B32M 131
C10C32F15A34 (S/D), 35 (C/P), 36 (W/G)N 131
D 130I 131O 231
D 230I 231O 331
D 332I 331T 131
D 632I 431V 131
E 130I 531V 231
E 430I 631V 331
E 7C32I 731V 531
E 8B32I1031
E10A32I1233
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
125R/B NO. 1 (LEFT KICK PANEL)
626R/B NO. 6 (BEHIND GLOVE BOX)
SERVICE HINTS

127
A15
3A
C
IF I14 I16
I14
I164 2
1 2 II2 16
II2 12 B 16
B 6B4 A 6A14C 2
A 13A 8
B 7A
B
B 5
CAAAA
13
B A
21
CCC
C
B2
B2 1 1 2
B
BB
BG
G G
G
G
G G G
G
G
G
G G±WB BB B B
B
W±BW±B W±BB
G
BBJUNCTION CONNECTOR
JUNCTION CONNECTOR
COMBINATION METER
BLOWER SW
RADIO AND PLAYER
A/T INDICATOR LIGHT
[COMB. METER]
ELECTRONIC CONTROLLED
TRANSMISSION PATTERN
SELECT SWA/T INDICATOR LIGHT
(
SHIFT LEVER)
RHEOSTAT
GLOVE BOX LIGHT(
PUSH SW TYPE)
(
LEVER SW TYPE)
GLOVE BOX SW
JUNCTION
CONNECTOR J2 J2 J2
R7
G4 G3E6O5 C11 C8 , C9
B6B
B A
R2 ,R3 ,R4B A12
B
IN1 2
IN1 1
BG
IM2 10
A 10
C 9
IM1 5
(
W/O CD PLAYER)
(
W/ CD PLAYER)G W±G B(
W/ CD PLAYER) (
W/O CD PLAYER)
(
W/ CD PLAYER)(
W/O CD PLAYER)
G
(
W/ CD PLAYER) (
PUSH SW TYPE)
(
LEVER SW TYPE) H8AA/C SW
HEATER CONTROL SW
I17 G
(
W/ CD PLAYER) G
G
1D 11 1B4 1D 10
1L7
1D 11L8 1D 21B5

193
*
2:TMMMADE * 1 : TMC MADE
A
M 26 25 24 1211 23 22 9 1 15 16
3217 65A 17 B7
IP 3 17 IP15
IR1 9IR18IR17IR13IR12IR11
EB 4I23
10 FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
VR3 VR2 VR1 MC MO
R±Y
W±B W±B IDL ECT OD STP+ BATT STP±
L
P±L L
V±R
Y±B
G±R
G±R G±R
G±W G±W G±W R±GR±BL L±B L±R L±R
L±B
L
R±B
R±G
R±Y
(
1MZ±FE)
(
5S±FE)
CRUISE CONTROL ECU
CRUIS E CONTROL ACTUATOR E NGINE CO NTROL MO DULE
(
ENGINE AND ELECTRONIC CONTROLLED
TRANSMISSION ECU)
A 32
C 12
C16
C2 IDL S2 OD1A 1B1
B
2B2
14 23 G±R
G±W
G±B
G±R
R±YG±B
NOISE FILTER
(
FOR STOP LIGHT)
STOP
LIGHT SW
N2 ,N3
S10
A
(
A/T) (
A/T)
(
A/T)L±W
(
1MZ±FE)
L
(
5S±FE)
B E7 ,E10
AC,E8(
A/T)
E14C(
M/T)
1A 12 1M3 15A
STOP
1A 151M 6
3B 133C 19
2E8
2B6