1994 TOYOTA CAMRY ignition

189
CIGARETTE LIGHTER AND CLOCK
2G 2
I7
IE 1
F12
F243
W±BL±R
L±R
R L±R W±B
G GW±B W±B
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
20A
DOME
JUNCTION
CONNECTOR
FROM TA IL FUSE CIGARETTE
LIGHTERCLOCK
J2C4
C6SERVI CE HI NTS
F F F C4 C6
J2DARK GRAYBLACK
(
HINT : SEE PAGE 7) 1
212
34
1D 715A
CIG/RADIO
3D 93C 21
1M 51C 8
C 4 CIGARETTE LIGHTER2±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT
ACC OR ON POSITION
1±GROUND : ALWAYS CONTINUITY
C 6
CLOCK3±GROUND : ALWAYS APPROX. 12 VOLTS (POWER FOR
CLOCK)
4±GROUND : APPROX .12 VOLTS WITH IGNITION SW AT
ACC OR ON POSITION
(POWER FOR INDICATION)
2±GROUND : APPROX .12 VOLTS WITH LIGHT CONTROL
SW AT TAIL OR HEAD POSITION
APPROX. 12 VOLTS WITH ENGINE
RUNNING AND PARKING BRAKE RELEASED
(CANADA)
1±GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 432C 632J 233
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B
1C20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1D20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1M
2E22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE42LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 744COWL WIRE

191
DEFOGGER RELAY
5±3 : CLOSED WITH IGNITION SW ON, DEFOGGER SW ON
R 5 REAR WINDOW DEFOGGER SW
3±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
2±GROUND : ALWAYS CONTINUITY
3±6 : CONTINUITY WITH DEFOGGER SW ON
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
J 233R16A34 (S/D), 35 (C/P), 36 (W/G)R17B34 (S/D), 35 (C/P), 36 (W/G)
R 533R16C34 (S/D), 35 (C/P), 36 (W/G)R17D34 (S/D), 35 (C/P), 36 (W/G)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1D20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1H20FLOOR NO. 1 WIRE J/B NO. 1 (INSTRUMENT PANEL LEFT)
1M20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
Bc150 (W/G)BACK DOOR NO. 1 WIRE AND FLOOR NO. 1 WIRE
Bd350 (W/G)BACK DOOR NO. 1 WIRE AND BACK DOOR NO. 2 WIRE
Be150 (W/G)REAR WINDOW NO. 1 WIRE AND BACK DOOR NO. 2 WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE42LEFT KICK PANEL
IG42INSTRUMENT PANEL BRACE LH
BN46 (S/D)UNDER THE RIGHT QUARTER PILLARBN48 (C/P)UNDER THE RIGHT QUARTER PILLAR
BS50 (W/G)BACK DOOR RIGHT
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 744COWL WIRE
A
F F FX2
36 J2 R 5 R16 ,R17B DARK GRAYBLACK BLUE
(
HINT : SEE PAGE 7)11D R16 , R17CBLACK
SERVICE HINTS

192
CRUISE CONTROL
B
ST1 IG1 ACC
AM1
7
IP3 8IP3 11
II1 4 2 1
1 1 213 41883
17 15
20 1420 510 2
13B 4 B 12 B5B9 A 6
1 2
IG CC
I13
11 R±L R±L
R±L
W±B
W±B W±B
B±R B±W
R±L B±W
B±R B
B
W±B
W±L
W
LG±R
R±W LG±R
R±W LG±R
R±W
R±WW±B
W±B
G±BG
V±Y
G±Y V±YP LG B
FROM POWER SOURCE SYSTEM(
SEEPAGE64)
10A
GAUGE
COMBINATON METER
DIODE
(
FOR CRUISE
CONTROL)VEHICLE
SPEED SENSOR
(
SPEED SENSOR)
DATA LINK CONNECTOR 2
(
TDCL)
A/D JUNCTION
CONNECTOR
CRUISE CONTROL
CLUTCH SW
(
M/T)
CRUISE CONTROL SW
[COMB. SW]
DA TA LINK CONNE CTOR 1
(
CHECK CONNECTOR)
PARKING
BRAKE SW
PARKING
BRAKE SWMAIN
CA NCELSET/
COAST RE SUME/
ACCEL N&C GND CMS CCS TC PKBBSPD PI
TC
IGNITION SW
P
N5
6EF1 1
B±W B±W
J1
P1
D5
C8 , C9
D3
V5A
PARK/NEUTRAL POSITION SW
(
NE UTRAL S TA RT SW)
(
A/T) B
TO STARTER RELAY
CRUIS E CONTROL ECU C16
C15
C13
D1
P3
P2
(
1MZ±FE)
SPEED
CRUISEI12
IP3 2
(
A/T)
(
5S±FE)IP3 14
(
A/T)
(
M/T) (
M/T)
R±L
TO BA CK ±UP LIGHT SW(
M/T)
TO PARK/NEUTRAL POSITION SW
(
NE UTRA L S TA RT SW)(
A/T)
TO GENERATOR(
ALTERNATOR)
R±L
I18
(
*2) O
(
*1)
G±L
(
*2) O
(
*1)
O
(
*1) G±L
(
*2)
1G 63C16
1A 14 3B16 1E 5
1A 71D61B6 15A
ECU±IG
3D 22 3B8
3B 10 3B19 3B9
3B 73B18
3B 17
3B 14 3B5
3C 18
1M1
1C11
3B 12
3D 83C83B 15
3D 16

196
CRUISE CONTROL
CURRENT IS APPLIED AT ALL TIMES THROUGH STOP FUSE TO TERMINAL 1 OF THE CRUISE CONTROL ECU AND TERMINAL 2 OF
STOP LIGHT SW, AND ALSO THROUGH THE STOP FUSE TO TERMINAL 15 OF CRUISE CONTROL ECU.
WITH THE IGNITION SW TURNED TO ON, THE CURRENT FLOWS THROUGH GAUGE FUSE TO TERMINAL (A) 6 OF COMBINATION
METER AND THE CURRENT THROUGH ECU±IG FUSE FLOWS TO TERMINAL 14 OF CRUISE CONTROL ECU.
WHEN THE IGNITION SW IS ON AND THE CRUISE CONTROL MAIN SW IS TURNED ON, A SIGNAL IS INPUT FROM TERMINAL 15 OF
CRUISE CONTROL MAIN SW TO TERMINAL 4 OF CRUISE CONTROL ECU. AS A RESULT, THE CRUISE CONTROL ECU FUNCTIONS
AND THE CURRENT TO TERMINAL 14 OF CRUISE CONTROL ECU TO TERMINAL 13 OF CRUISE CONTROL ECU " GROUND, AND
THE CRUISE CONTROL SYSTEM IS IN A CONDITION READY FOR OPERATION.
AT THE SAME TIME, THE CURRENT THROUGH THE GAUGE FUSE FLOWS FROM TERMINAL (A) 6 OF CRUISE CONTROL INDICATOR
LIGHT " TERMINAL (B) 9 " TERMINAL 5 OF CRUISE CONTROL ECU " TERMINAL 13 " TO GROUND, CAUSING THE CRUISE
CONTROL INDICATOR LIGHT TO LIGHT UP, INDICATING THAT THE CRUISE CONTROL IS READY FOR OPERATION.
1. SET OPERATION
WHEN THE CRUISE CONTROL MAIN SW IS TURNED ON AND THE SET SW IS TURNED ON WITH THE VEHICLE SPEED WITHIN THE
SET LIMIT (APPROX. 40 KM/H, 25 MPH TO 200 KM/H, 124 MPH), A SIGNAL IS INPUT TO TERMINAL 18 OF THE CRUISE CONTROL ECU
AND THE VEHICLE SPEED AT THE TIME THE SET SW IS RELEASED IS MEMORIZED IN THE ECU AS THE SET SPEED.
2. SET SPEED CONTROL
DURING CRUISE CONTROL DRIVING, THE ECU COMPARES THE SET SPEED MEMORIZED IN THE ECU WITH THE ACTUAL VEHICLE
SPEED INPUT INTO TERMINAL 20 OF THE CRUISE CONTROL ECU FROM THE VEHICLE SPEED SENSOR (SPEED SENSOR), AND
CONTROLS THE CRUISE CONTROL ACTUATOR TO MAINTAIN THE SET SPEED.
WHEN THE ACTUAL SPEED IS LOWER THAN THE SET SPEED, THE ECU CAUSES THE CURRENT TO THE CRUISE CONTROL
ACTUATOR TO FLOW FROM TERMINAL 12" TERMINAL 6 OF CRUISE CONTROL ACTUATOR "TERMINAL 7 "TERMINAL 11 OF
CRUISE CONTROL ECU. AS A RESULT, THE MOTOR IN THE CRUISE CONTROL ACTUATOR IS ROTATED TO OPEN THE THROTTLE
VALVE AND THE THROTTLE CABLE IS PULLED TO INCREASE THE VEHICLE SPEED. WHEN THE ACTUAL DRIVING SPEED IS HIGHER
THAN THE SET SPEED, THE CURRENT TO CRUISE CONTROL ACTUATOR FLOWS FROM TERMINAL 11 OF ECU "TERMINAL 7 OF
CRUISE CONTROL ACTUATOR "TERMINAL 6 "TERMINAL 12 OF CRUISE CONTROL ECU.
THIS CAUSES THE MOTOR IN THE CRUISE CONTROL ACTUATOR TO ROTATE TO CLOSE THE THROTTLE VALVE AND RETURN THE
THROTTLE CABLE TO DECREASE THE VEHICLE SPEED.
3. COAST CONTROL
DURING THE CRUISE CONTROL DRIVING, WHILE THE COAST SW IS ON, THE CRUISE CONTROL ACTUATOR RETURNS THE
THROTTLE CABLE TO CLOSE THE THROTTLE VALVE AND DECREASE THE DRIVING SPEED. THE VEHICLE SPEED WHEN THE COAST
SW IS TURNED OFF IS MEMORIZED AND THE VEHICLE CONTINUES AT THE NEW SET SPEED.
4. ACCEL CONTROL
DURING CRUISE CONTROL DRIVING, WHILE THE ACCEL SW IS TURNED ON, THE CRUISE CONTROL ACTUATOR PULLS THE
THROTTLE CABLE TO OPEN THE THROTTLE VALVE AND INCREASE THE DRIVING SPEED.
THE VEHICLE SPEED WHEN THE ACCEL SW IS TURNED OFF IS MEMORIZED AND THE VEHICLE CONTINUES AT THE NEW SET
SPEED.
5. RESUME CONTROL
UNLESS THE VEHICLE SPEED FALLS BELOW THE MINIMUM SPEED LIMIT (APPROX. 40 KM/H, 25 MPH) AFTER CANCELING THE SET
SPEED BY THE CANCEL SW, PUSHING THE RESUME SW WILL CAUSE THE VEHICLE TO RESUME THE SPEED SET BEFORE
CANCELLATION.
6. MANUAL CANCEL MECHANISM
IF ANY OF THE FOLLOWING OPERATIONS OCCURS DURING CRUISE CONTROL OPERATION, CURRENT FLOW TO MAGNETIC
CLUTCH OF THE ACTUATOR IS CUT TURNS OFF AND THE MOTOR ROTATES TO CLOSE THE THROTTLE VALVE AND THE CRUISE
CONTROL IS RELEASED.
*PLACING THE SHIFT LEVER IN ªNº POSITION (PARK/NEUTRAL POSITION SW (NEUTRAL START SW ON). ªSIGNAL INPUT TO
TERMINAL 2 OF ECUº (A/T)
*DEPRESSING THE CLUTCH PEDAL (CLUCH SW ON). ªSIGNAL INPUT TO TERMINAL 2 OF THE ECUº (M/T)
*DEPRESSING THE BRAKE PEDAL (STOP LIGHT SW ON). ªSIGNAL INPUT TO TERMINAL 16 OF ECUº
*PUSH THE CANCEL SW (CANCEL SW ON). ªSIGNAL INPUT TO TERMINAL 18 OF ECUº
*DEPRESSING THE PARKING BRAKE PEDAL (PARKING BRAKE SW ON). ªSIGNAL INPUT TO TERMINAL 3 OF ECUº (3VZ±FE)
*PULLING THE PARKING BRAKE LEVER (PARKING BRAKE SW ON). ªSIGNAL INPUT TO TERMINAL 3 OF THE ECUº (5S±FE)
SYSTEM OUTLINE

197
7. AUTO CANCEL FUNCTION
A) IF ANY OF THE FOLLOWING OPERATING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE SET SPEED IS
ERASED, CURRENT FLOW TO MAGNETIC CLUTCH IS CUT OFF AND THE CRUISE CONTROL IS RELEASED. (MAIN SW TURNS OFF).
WHEN THIS OCCURS, THE IGNITION SW MUST BE TURNED OFF ONCE BEFORE THE MAIN SW WILL TURN ON AGAIN.
*OVER CURRENT TO TRANSISTOR DRIVING MOTOR AND/OR MAGNETIC CLUTCH.
*WHEN CURRENT CONTINUED TO FLOW TO THE MOTOR INSIDE THE ACTUATOR IN THE THROTTLE VALVE ªOPENº DIRECTION.
*OPEN CIRCUIT IN MOTOR AND/OR MAGNETIC CLUTCH.
*MOMENTARY INTERRUPTION OF VEHICLE SPEED SIGNAL.
*SHORT CIRCUIT IN CRUISE CONTROL SW.
*MOTOR DOES NOT OPERATE DESPITE THE MOTOR DRIVE SIGNAL BEING OUTPUT.
B) IF ANY OF THE FOLLOWING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE SET SPEED IS ERASED AND
THE CRUISE CONTROL IS RELEASED. CURRENT FLOW TO MAGNETIC CLUTCH IS CUT OFF UNTIL THE SET SW IS ªONº AGAIN.)
*WHEN THE VEHICLE SPEED HAS FALLEN BELOW THE MINIMUM SPEED LIMIT, APPROX. 40 KM/H (25 MPH)
*WHEN THE VEHICLE SPEED HAS FALLEN MORE THAN 16 KM/H (10 MPH) BELOW THE SET SPEED, E.G. ON AN UPWARD SLOPE.
*WHEN POWER TO THE CRUISE CONTROL SYSTEM IS MOMENTARILY CUT OFF.
C) IF ANY OF THE FOLLOWING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE CRUISE CONTROL IS
RELEASED.
*OPEN CIRCUIT FOR TERMINAL 1 OF CRUISE CONTROL ECU.
8. AUTOMATIC TRANSMISSION CONTROL FUNCTION
*IN OVERDRIVE. IF THE VEHICLE SPEED BECOMES LOWER THAN THE OVERDRIVE CUT SPEED (SET SPEED MINUS APPROX. 4
KM/H, 2.5 MPH) DURING CRUISE CONTROL OPERATION, SUCH AS DRIVING UP A HILL, THE OVERDRIVE IS RELEASED AND THE
POWER INCREASED TO PREVENT A REDUCTION IN VEHICLE SPEED.
*AFTER RELEASING THE OVERDRIVE, IF VEHICLE SPEED BECOMES HIGHER THAN THE OVERDRIVE RETURN SPEED (SET
SPEED MINUS APPROX. 2 KM/H, 1.2 MPH) AND THE ECU JUDGES BY THE SIGNALS FROM POTENTIOMETER OF THE ACTUATOR
THAT THE UPWARD SLOPE HAS FINISHED, OVERDRIVE IS RESUMED AFTER A WHILE.
C 2 CRUISE CONTROL ACTUATOR
1±3 : APPROX. 2 K

5±4 : APPROX. 38

C13 CRUISE CNTROL SW MAIN [COMB. SW]
15±20 : CONTINUITY WITH MAIN SW ON
20±17 : APPROX. 418
WITH CANCEL SW ON
APPROX. 68
WITH RESUME/ACCEL SW ON
APPROX. 198
WITH SET/COAST SW ON
C16 CRUISE CONTROL ECU
14±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
1,15±GROUND : ALWAYS APPROX. 12 VOLTS
3±GROUND : CONTINUITY WITH PARKING BRAKE SW ON (ONE OF THE CANCEL SW) OR BRAKE LEVEL WARNING SW ON
20±GROUND :4 PULSE WITH 1 ROTATION OF ROTOR SHAFT
18±GROUND : APPROX. 418
WITH CANCEL SW ON IN CONTROL SW
APPROX. 68
WITH RES/ACC SW ON IN CONTROL SW
APPROX. 198
WITH SET/COAST SW ON IN CONTROL SW
13±GROUND : ALWAYS CONTINUITY
2±GROUND : CONTINUITY WITH SHIFT LEVER AT N POSITION (A/T) OR CLUTCH PEDAL DEPRESSED (M/T)
SERVICE HINTS

202
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (1MZ±FE)
E 7(B), E 8 (C), E10(A)ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(TURN ON THE IGNTION SW)
S1, S2± E1 : 9.0±14.0 VOLTS WITH SOLENOID ON
0±1.5 VOLTS WITH SOLENOID OFF
P± E1:7.5±14.0 VOLTS WITH IGNITION SW ON AND PATTERN SELECT SW AT POWER POSITION
L± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT L POSITION
2± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT 2 POSITION
R± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT R POSITION
STP± E1:9.0±14.0 VOLTS WITH BRAKE PEDAL DEPRESSED
THW± E2:0.2±1.0 VOLTS WITH WITH ENGINE COOLANT TEMP. 60°C (140°F) ±120°C (248°F)
IDL± E2:0±1.5 VOLTS WITH THROTTLE VALVE FULLY CLOSED
9.0±14.0 VOLTS WITH THROTTLE VALVE FULLY OPENED
VTA±E2:0.3±0.8 VOLTS WITH THROTTLE VALVE FULLY CLOSED
3.2±4.9 VOLTS WITH THROTTLE VALVE FULLY OPENED
VC± E2:4.5±5.5 VOLTS WITH IGNITION SW AT ON POSITION
OD1± E1:4.5±5.5 VOLTS WITH IGNITION SW AT ON POSITION
OD2± E1:9.0±14.0 VOLTS WITH O/D MAIN SW TURNED OFF
0±3.0 VOLTS WITH O/D MAIN SW TURNED ON
IGSW± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
+B± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
+B1± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
E 2
ELECTRONIC CONTROLLED TRANSMISSION SOLENOID1, 2, 6±GROUND : EACH 11±15 W
O 5 O/D MAIN SW1±3 : CLOSED WITH O/D MAIN SW OFF, OPEN WITH O/D MAIN SW ON
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 832E 9C32O 533
C1132E10D32O 629
D 128J 133P 129
E 228J 233S1033
E 428J 333T 129
E 632J 733V 529
E 7A32N 2A33
E 8B32N 3B33
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A
1D20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1K20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1M
2B22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2C22ENGINE WIRE AND J/B NO 2 (ENGINE COMPARTMENT LEFT)2D22ENGINE WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
3B
3C24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
3D
24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
II142COWL WIRE AND INSTRUMENT PANEL WIRE
II242INSTRUMENT PANEL WIRE AND COWL WIRE
IN142INSTRUMENT PANEL WIRE AND SWITCH WIRE
IP144ENGINE WIRE AND COWL WIREIP344ENGINE WIRE AND COWL WIRE
IQ144ENGINE WIRE AND INSTRUMENT PANEL WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB38 (1MZ±FE)FRONT LEFT FENDER
ED38 (1MZ±FE)INTAKE MANIFOLD LH
IF42LEFT KICK PANEL
SERVICE HINTS

204
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (5S±FE)
A
C,B
A2D 2
2B 22C32D4
IP 1 11 IP312 IP 1 18
I23
A 1A3B1 A 12
BA 13
B1A 1
BATTA 4
B/KA 22
NSWB 12
IDLB 1
VCB 11
VTAB 9
E2
C 15S2
C 2S1
C 1SL
C 14E1
C 13E01
C 26E02
EBEC EDE21 2431
I18
E18 I18BRBR
BR
B±O B±O
G±W
R
BR
R
BR BRR B±W G±W G±WW±B
B±O
W±G B±O B±O
B±O
W±L
V
L±Y P±L
W±B
W±BBR W±B
L
B
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
15A
EFI
EFI MAIN
RE LA YTHROTTLE POSITION SENSOR
ELECTRONIC CONTROLLED
TRANSMISSION SOLENOID
FROM IGNITION
SW º ST1º
IP 316
BR
E2 ,E3
E7 E8 ,E10T1
A
B
WB
B 16E17
25 13
A 9
SPEED
IP3 11 IP314 5124
G±B
G
23
1 VEHICLE SPEED
SENSOR
(
SPEED SENSOR)
LGP
R±L SP1
COMBINATION
METER
V5C8V±Y V±Y
BR BR FROM MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
V ACUUM S ENS OR) TO MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
V ACUUM S ENS OR)
BR
BR
STOP LIGHT SW
G±R
G±W
2 1
S10
B
1 A 2
B 2B1
NOISE FILTER
(
FOR S TOP L IGHT) N2 ,N3
A
G± W
G±R NO. 3
(
LOCK±UP) NO. 1 NO. 2
E NGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(
*3)
1A 15
3B 43C 191M 6
1D 97. 5A
IGN1M 315A
STOP
3D22
3D10

206
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (5S±FE)
PREVIOUS AUTOMATIC TRANSMISSIONS HAVE SELECTED EACH GEAR SHIFT USING MECHANICALLY CONTROLLED THROTTLE
HYDRAULIC PRESSURE, GOVERNOR HYDRAULIC PRESSURE AND LOCK±UP HYDRAULIC PRESSURE. THE ELECTRONIC
CONTROLLED TRANSMISSION, HOWEVER, ELECTRICALLY CONTROLS THE LINE PRESSURE AND LOCK±UP PRESSURE ETC.,
THROUGH THE SOLENOID VALVE. ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
CONTROL OF THE SOLENOID VALVE BASED ON THE INPUT SIGNALS FROM EACH SENSOR MAKES SMOOTH DRIVING POSSIBLE BY
SHIFT SELECTION FOR EACH GEAR WHICH IS MOST APPROPRIATE TO THE DRIVING CONDITIONS AT THAT TIME.
1. GEAR SHIFT OPERATION
DURING DRIVING, THE ENGINE CONTROL MODULE (ECU) SELECTS THE SHIFT FOR EACH GEAR WHICH IS MOST APPROPRIATE TO
THE DRIVING CONDITIONS, BASED ON INPUT SIGNALS FROM THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR)
TO TERMINAL THW OF THE ENGINE CONTROL MODULE (ECU), AND ALSO THE INPUT SIGNALS TO TERMINAL SP1 OF THE ENGINE
CONTROL MODULE (ECU) FROM THE VEHICLE SPEED SENSOR (SPEED SENSOR) DEVOTED TO THE ELECTRONIC CONTROLLED
TRANSMISSION. CURRENT IS THEN OUTPUT TO THE ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS. WHEN SHIFTING TO
1ST SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (A)3 OF THE
ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO THE NO. 1 SOLENOID CAUSES THE
SHIFT.
FOR 2ND SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (A)3 OF THE
ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL
MODULE (ECU) " TERMINAL (A)1 OF THE ELECTRONIC CONTROL TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO
SOLENOIDS NO. 1 AND NO. 2 CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUITY TO NO. 1 SOLENOID, ONLY TO NO. 2, CAUSING THE SHIFT.
SHIFTING INTO 4TH SPEED (OVERDRIVE) TAKES PLACE WHEN THERE IS NO CONTINUITY TO EITHER NO. 1 OR NO. 2 SOLENOID.
2. LOCK±UP OPERATION
WHEN THE ENGINE CONTROL MODULE (ECU) JUDGES FROM EACH SIGNAL THAT LOCK±UP OPERATION CONDITIONS HAVE BEEN
MET, CURRENT FLOWS FROM TERMINAL SL OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (B)1 OF THE ELECTRONIC
CONTROLLED TRANSMISSION SOLENOID " GROUND, CAUSING CONTINUITY TO THE LOCK±UP SOLENOID AND CAUSING
LOCK±UP OPERATION.
3. STOP LIGHT SW CIRCUIT
IF THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) WHEN DRIVING IN LOCK±UP CONDITION, A SIGNAL IS INPUT TO
TERMINAL B/K OF THE ENGINE CONTROL MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES AND CONTINUITY TO
THE LOCK±UP SOLENOID IS CUT.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (O/D OFF INDICATOR LIGHT TURNS OFF), A SIGNAL IS INPUT TO TERMINAL OD2 OF THE
ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION CAUSES GEAR SHIFT WHEN THE
CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED TO OFF, THE CURRENT FLOWING THROUGH THE O/D OFF INDICATOR LIGHT FLOWS
THROUGH THE O/D MAIN SW TO GROUND. CAUSING THE INDICATOR LIGHT TO LIGHT UP. AT THE SAME TIME, A SIGNAL IS INPUT
TO TERMINAL OD2 OF THE ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION PREVENTS
SHIFT INTO OVERDRIVE.
5. ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
IF THE ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW IS CHANGED FROM NORMAL TO POWER, THE CURRENT
FLOWING THROUGH THE POWER INDICATOR FLOWS TO GROUND, CURRENT FLOWS TO TERMINAL P OF THE ENGINE CONTROL
MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES, AND SHIFT UP AND SHIFT DOWN OCCUR AT HIGHER VEHICLE
SPEEDS THAN WHEN THE SW IS IN NORMAL POSITION.
E 7(C), E 8 (B), E10(A)ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(TURN ON THE IGNTION SW)
S1, S2 ±E1 :9.0±14.0 VOLTS WITH SOLENOID ON
0±1.5 VOLTS WITH SOLENOID OFF
P ±E1:7.5±14.0 VOLTS WITH IGNITION SW ON AND PATTERN SELECT SW AT POWER POSITION
L± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT L POSITION
2± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT 2 POSITION
R± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT R POSITION
B/K± E1:9.0±14.0 VOLTS WITH BRAKE PEDAL DEPRESSED
THW± E2:0.2±1.0 VOLTS WITH WITH ENGINE COOLANT TEMP. 60°C (140°F) ±120°C (248°F)
IDL± E2:0±1.5 VOLTS WITH THROTTLE VALVE FULLY CLOSED
9.0±14.0 VOLTS WITH THROTTLE VALVE FULLY OPENED
SYSTEM OUTLINE
SERVICE HINTS