1996 TOYOTA RAV4 Speed sensor

65
2. CONTROL SYSTEM
*SFI
THE SFI SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS, WHICH ARE INPUT FROM EACH SENSOR (INPUT
SIGNALS (1) TO (11)). 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, AND #40 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.
*IDLE SPEED CONTROL SYSTEM
THE IDLE SPEED CONTROL SYSTEM INCREASES THE RPM AND PROVIDES IDLING STABILITY FOR FAST IDLE-UP WHEN THE
ENGINE IS COLD AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD, ETC. THE ENGINE CONTROL MODULE
EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1 TO 5, 11), OUTPUTS CURRENT TO TERMINAL ISCO AND ISCC,
AND CONTROLS THE IDLE AIR CONTROL VALVE.
*A/C CUT CONTROL SYSTEM
WHEN THE VEHICLE SUDDENLY ACCELERATES FROM LOW ENGINE SPEED, THIS SYSTEM CUTS OFF AIR CONDITIONING
OPERATION FOR A FIXED PERIOD OF TIME IN RESPONSE TO THE SPEED SENSOR, THROTTLE VALVE OPENING ANGLE AND
INTAKE MANIFOLD PRESSURE IN ORDER TO MAINTAIN ACCELERATION PERFORMANCE.
THE ENGINE CONTROL MODULE RECEIVES INPUT SIGNALS (4, 5 AND 9), AND INPUTS SIGNALS TO TERMINAL ACT.
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. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING
THE DISPLAY (CODE) OF THE MALFUNCTION INDICATOR LAMP.
4. FAIL-SAFE SYSTEM
WHEN A MALFUNCTION OCCURS ON ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE THROUBLE BEING CAUSED BY
CONTINUED CONTROL BASED IN 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.

70
ENGINE CONTROL
IG 2 10 IG 2 9 IG 1 28 R-L
R-L
R-L
L-B
R-YL-B
R-
V- W
G-R
VEHICLE SPE ED SENSOR
(
CO MBINATION M ETER) COMBINATION
METER C 9
G-R V-WR-B J10 , J11
A
A C
B B
B B LJUNCTION CONNECTOR
R-L
11 1 0 2 9
Y
3 2 1
V 2
MALFANCTION
INDICATOR LAMP
SPEED
1B8
1E8

130
ELECTRONICALLY CONTROLLED TRANSMISSION
THIS SYSTEM ELECTRONICALLY CONTROLS THE GEAR SHIFT TIMING, LOCK-UP TIMING, THE CLUTCH AND BRAKE HYDRAULIC
PRESSURE, AND THE ENGINE TORQUE DURING SHIFTING TO ACHIEVE OPTIMUM SHIFT FEELING.
IN ACCORDING TO THE VEHICLE DRIVING CONDITIONS AND ENGINE OPERATING CONDITIONS AS DETECTED BY VARIOUS
SENSORS.
1. GEAR SHIFT OPERATION
DURING DRIVING, THE ENGINE CONTROL MODULE SELECTS THE SHIFT FOR EACH GEAR WHICH IS MOST APPROPRIATE TO THE
DRIVING CONDITIONS, BASED ON INPUT SIGNALS FROM THE ENGINE COOLANT TEMP. SENSOR TO TERMINAL THW OF THE
ENGINE CONTROL MODULE, AND ALSO THE INPUT SIGNALS TO TERMINAL SPD OF THE ENGINE CONTROL MODULE FROM THE
SPEEDOMETER DEVOTED TO THE ELECTRONICALLY CONTROLLED TRANSMISSION. CURRENT IS THEN OUTPUT TO THE
ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID. WHEN SHIFTING TO 1ST SPEED, CURRENT FLOWS FROM TERMINAL
S1 OF THE ENGINE CONTROL MODULE "TERMINAL
(A) 3 (2WD) OR (B) 3 (4WD) OF THE ELECTRONICALLY CONTROLLED
TRANSMISSION SOLENOID "GROUND, AND CONTINUES TO THE NO. 1 SOLENOID CAUSES THE SHIFT.
FOR 2ND SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE "TERMINAL 3 OF THE
ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID "GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL
MODULE "TERMINAL
(A) 1 (2WD) OR (B) 6 (4WD) OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID "
GROUND, AND CONTINUES TO SOLENOIDS NO. 1 AND NO. 2 CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUOUS TO NO. 1 SOLENOID, ONLY TO NO. 2 CAUSING THE SHIFT.
SHIFTING INTO 4TH SPEED (OVERDRIVE) TAKES PLACE WHEN THERE IS NO CONTINUOUS TO EITHER NO. 1 OR NO. 2 SOLENOID.
2. LOCK-UP OPERATION
WHEN THE ENGINE CONTROL MODULE JUDGES FROM EACH SIGNAL THAT LOCK-UP OPERATION CONDITIONS HAVE BEEN MET,
CURRENT FLOWS FROM TERMINAL SL OF THE ENGINE CONTROL MODULE "TERMINAL
(A) 2 (2WD) OR (B) 5 (4WD) OF THE
ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID "GROUND, CONTINUES 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, THE ENGINE CONTROL MODULE OPERATES AND CURRENT TO THE LOCK-UP
SOLENOID IS CUT.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (SW POINT IS OPEN), A SIGNAL IS INPUT TO TERMINAL OD2 OF THE ENGINE CONTROL
MODULE AND ENGINE CONTROL MODULE OPERATION CAUSES GEAR SHIFT WHEN THE CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED OFF (SW POINT IS CLOSED), 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 AND ENGINE CONTROL MODULE OPERATION
PREVENTS SHIFT INTO OVERDRIVE.
SYSTEM OUTLINE

133
I 4 I 4 B 2PIM
B 1VC
B 11VTA
B 3TH A
B 4THW
B 7PTN K
B 9E2
Y
BR BR BR
LG-R
YY
L-R
Y-B
W
BR BR
BR
BR
BR SENSOR
OR
ENGINE CONTROL M ODULEB E 4 , E 5AC, E 6
B 15
L-W
A 2
A 15 A1C13 C3C2A8A7B14 B13
TE1S1
S2 SL ST SLD+ SLD- FR+ FR- RR+ RR-
P-B
P
Y-B
LG
L- B
BR-B
Y-R
W-R
L- Y
R-L
I 5 I 5 I 5 TO CRUISE
CONTROL ECUIG 2 14 IG 2 13
IG 2 12 A 3
B 3A 1A2(
2W D)
B 1(
4W D)
B 5 B 6
(
4W D)
(
4W D)(
4WD)
(
4WD)
(
4W D)
(
4W D)
(
4W D)
(
4W D)L-B
BR - B LG
B E 1 , A
ELECTRO NICALLY
CONTROLLED
TRANSM ISSION SOLENOID
(
4W D)(
4W D)
I 5 P
PFROM CRUISE CONTROL ECU
1 31212 SOLENOID VALVE
SLD S 1
VEHICLE SPEED
SENSOR (
FRO N T) V 3
VEHICLE SPEED
SENSOR (
REAR) V 4
1 2
1 2
11 1 3 2432
32
E2
L Y
BR
BR
Y
L- Y
VCC PTNK
L-R
L Y M 1
MANIFOLD ABSOLUTE
PRESSURE SENSOR
THRO TTLE
POSITION T 1
INTAKE AIR TEMP. SENS I 9
ENGINE COOLANT
TEM P
. SE
NSOR E 2
VAPOR PRESSURE
SENSOR V 1 8
B-RDATA LINK
CONNECTOR 1 D 1
12I 5
IG 1 5
E2 VC PIM
+B TE1

134
ELECTRONICALLY CONTROLLED TRANSMISSION
GAUGE
SE BLOCK] FROM POW ER SOURCE SYSTEM (
SEE PAGE 54)
IG 1 2 IG 2 9 IG 2 10
EC IGA 8
A 5A4A2 A 10 A11 B2
ECT PW RO/D OFF
4
R-G
LG
R-L
R- B LG-LG BR BR BR
R-L R-LR-L
R-LR-L-L
-L
LG
R-G LG
R-G
-W
V-WR- Y
L- B R- Y
L-B
W-B LG W-B
CO MBINATION M ETERB C 9 , C10A
EL ECTRONICALLY
CONTROLLED TRANSM ISSION
PATTERN SELECT SW E 3
(
COM BINATION METER) SPEED
JUNC
CONN J 32
CTION
NECTORB , J1 1 A
W-B JUNCTION CONNECTORB J10 , J11A
B BBBA C A C
I 5
1E 81B8
R
R
10A
[FU 3
F 8
POW ER NORMAL
3
BB B
B
TION
ECTORB
B JUN CTIO N
CONNECTOR J 5
C 7
OD2C 15
PC 9
SPD
C 8R
C 182
C 19L
A 14E1
A 26E02
A 13E01321
R
V
W-B
ENGINE CONTRO L M ODULEB E 4 , E 5AC, E 6
VEHICLE SPEED SENSOR V 2
IG 2 15 IG 216 IG17
4 2
A A
R-B LG - RLG BR BR BR
R-L
W-B
JUN CTION
CONNECTOR J 2O/D MAIN SW O 4
B A B 8(
4WD) A 5(
2WD)
B 3A 9
B 4A 4
A AAA A 6(
2WD)
B 2(
4WD)JU N
CON J10W-B
B P 1 , A
PARK/NEUTRAL
POSITION
SW

140
ABS
M A 1B2B4
C 8 C 11 C 10 C 9 D 25 D 26 D 12 D 13 C 2 C 1 C 5 C 15 C 4 A 2A4B1B5 A 3A 4B1B5B3B7B4B8B2B6A3A2A5A1
B 3 B 14 B 19 B 20
EA EBY-GY-G
L-B
L-R
W-B
W-R W-R
R-W
R- L R-B
W-BL- OL- R G-W BR-R BR-WG-Y
G-B
L- WL- R R-G R- W R-W
R-G
L-R
L-W
G-B
G-Y
BR-W
BR-R
G-W
L-O BR
BATTERY
ABS ACTUATOR ABS RELAYB A 8 , A 9AA A 6 , A 7B
ABS ECU A16 A MR R+(
2W D)
R-(
4W D)SR SFRH SFRR SFLH SFLR SRRH SRRR SRLH SRLR AST MT
FR+ FR- FSS FL+ FL-
B W BRG
R
FR O N T R H FRO NT LHEA15 2 W-RFU
B 6 W-BF 7
PKB
R-
R-B R-B
E 2
E 1I 3
W-B W-B W-BW- B
A 4B2B6B3B7B4B8B1B5A3A2A5A1(
2WD)
(
4WD)
B 4 B 18 B 8 B 7B 9 B 16 B 12 B 5 B 22 B 21 B 11 B 10 B 1(
2W D)
(
4W D)
B , A1 7
C 16 C 14 C 13 D 9
JU
CO J 1C 7 C 6(
2WD)
(
4WD) C , D,
(
4WD)
87
2 60A ABS
6 W
1J 15
1B19
1I 10 B
2 1 2 1
ABS SPEED SENSOR ABS SPEED SENSOR A10 A11 2 1
1
R-B
R-B FROM
CO M BINATION
METER(
SHIELDED)
PARKING BRAKE SW P 2BRAKE FLUID
LEVEL W ARNING SW B 2
A A
W-B
W-B
I 3
NCTION
NNECTOR(
4W D)
(
SHIELDED)
(
4WD)
SIBLE LINK BLOCK
100A ALT

141
A 7 A 1 A 10 A 3
EB D 10 C 12 D 6 D 20
B 13 B2
W-L
L
R-Y R-Y L W-L
R-L R-L
B-Y
R-Y 11 16 22 Y-GFROM POWER SOURCE SYSTEM (
SEE PAGE 54)
DATA LINK
ABS W ARNING LIGHT
[C O M B . M E T E R ]
D 1
TC TS WA IG1
RL+ RL- RSS RR+ RR- GND GNDABS ECU
R-Y
B-Y
1 1
BRY W-B W-BG
R
ABS OR
REA ABS OR
REA A21 A2 2
G
R
Y
BRW-BC 9
D 21
R-W R-W G-W G-W
STP
G-W
W-B
EA1 3 EA14IG219
A 8
B 7
B , C 10
A
R-L
418
IB 1 313
IB2 1
B-Y
IC1 7
B B
D 19
GL1
(
SHIELDED) (
SHIELDED)
1
IC 1 15
W W
D 7
GL2 5
IC1 6
R R
D 5
VGS 3
IC 1 14
G G
D 18
GGND2
IC 1 2 A15
W-B W-B
IF1 5IF16IF11IF13
W-B W-B
W-B
2
D 22
L- Y L-Y
15 A
DOME
BAT 19 18
IB1 10
R-Y
F
I 6A C
B B
JUNCTION CONNECTORB J10 , J11
A
A 2 A 4 A 8 A 9A12JU NC TIO N
CONNECTOR J 5
D
(
M/T)
G-W
G-W
(
2WD)
(
4WD)
D 16 D 15 D 23 D 2 D 1D 24 D11(
2WD)
(
4WD)
I 3
B 3I 3 I 3 (
SHIELDED)
(
SHIELDED)(
SHIELDED)
(
SHIELDED)
(
SHIELDED)(
SHIELDED) (
4WD)(
4W D)
W-B
W-B
(
2WD) (
4W D)
(
2W D)
W-B
(
2WD)
(
A/T)
(
A/T)I 2
I 3
(
4WD)(
4W D) (
2WD)
(
2W D)
(
4W D)
IF 1 4 A16 A B, A1 7 C , D,
(
4WD)
(
4W D)
(
4W D)
(
4W D)
(
4W D)(
4W D)
(
4W D)
(
4W D)
(
4W D)
(
4W D) (
4W D)
23
SHORT PIN
TC TS WA WB10A
GAUGE7. 5A
ECU-IG
CONNECTOR 110A
STOP
GL1 GL2 VGS GGND ABS DECELERATION SENSOR (
4WD) 315 12
FU SE
BLOCK 8
D 1 2
STOP
LIG HT
SW S 5
2
SPEED SENS
R LH2
SPEED SENS
R RH
1A 61E 6
1I 111F 2
1B 81E 8
1I 141I 13

142
ABS
THIS SYSTEM CONTROLS THE RESPECTIVE BRAKE FLUID PRESSURES ACTING ON THE DISC BRAKE CYLINDERS OF THE RIGHT
FRONT WHEEL, LEFT FRONT WHEEL AND REAR WHEELS WHEN THE BRAKES ARE APPLIED IN A PANIC STOP SO THAT THE
WHEELS DO NOT LOCK. THIS RESULTS IN IMPROVED DIRECTIONAL STABILITY AND STEERABILITY DURING PANIC BRAKING.
1. INPUT SIGNALS
(1) SPEED SENSOR SIGNAL
THE SPEED OF THE WHEELS IS DETECTED AND INPUT TO TERMINALS FL+, FR+, RL+ AND RR+ OF THE ABS ECU.
(2) STOP LIGHT SW SIGNAL
A SIGNAL IS INPUT TO TERMINAL STP OF THE ABS ECU WHEN BRAKE PEDAL IS OPERATED.
(3) PARKING BRAKE SW SIGNAL (4 WD)
A SIGNAL IS INPUT TO TERMINAL PKB OF THE ABS ECU WHEN THE PARKING BRAKE IS OPERATED.
(4) DECELERATION SENSOR SIGNAL (4 WD)
LONGITUDINAL ACCELERATION IS DETECTED AND A SIGNAL IS INPUT TO THE ABS ECU.
2. SYSTEM OPERATION
DURING SUDDEN BRAKING THE ABS ECU, WHICH HAS SIGNALS INPUT FROM EACH SENSOR, CONTROLS THE CURRENT FLOWING
TO THE SOLENOID INSIDE THE ACTUATOR AND LETS THE HYDRAULIC PRESSURE ACTING ON EACH WHEEL CYLINDER ESCAPE TO
THE RESERVOIR. THE PUMP INSIDE THE ACTUATOR IS ALSO OPERATING AT THIS TIME AND IT RETURNS THE BRAKE FLUID FROM
THE RESERVOIR TO THE MASTER CYLINDER, THUS PREVENTING LOCKING OF THE VEHICLE WHEELS.
IF THE ECU JUDGES THAT THE HYDRAULIC PRESSURE ACTING ON THE WHEEL CYLINDER IS INSUFFICIENT, THE CURRENT
ACTING ON THE SOLENOID IS CONTROLLED AND THE HYDRAULIC PRESSURE IS INCREASED. HOLDING OF THE HYDRAULIC
PRESSURE IS ALSO CONTROLLED BY THE ECU, BY THE SAME METHOD AS ABOVE. BY REPEATED PRESSURE. REDUCTION,
HOLDING AND INCREASE ARE REPEATED TO MAINTAIN VEHICLE STABILITY AND TO IMPROVE STEERABILITY DURING SUDDEN
BRAKING.
A 8 (A), A 9 (B) ABS RELAY
(A) 1, (B) 2-GROUND : ALWAYS APPROX. 12 VOLTS
(B) 6-GROUND : ALWAYS CONTINUITY
A10, A11 ABS SPEED SENSOR FRONT LH, RH
1-2 : APPROX. 0.92-1.22 KW (20
C, 68
F)
A12, A13 ABS SPEED SENSOR REAR LH, RH
1-2 : APPROX. 0.92-1.22 KW (20
C, 68
F)
A16 (A), (C), A17 (B), (D) ABS ECU
(CONNECT THE ECU CONNECTORS)
(A) 8, (D) 6-GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION AND
DATA LINK CONNECTOR 1 TS-E1 NOT CONNECTED
(A) 9, (D) 20-GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION AND
DATA LINK CONNECTOR 1 TC-E1 NOT CONNECTED
(B) 4, (C) 1- GROUND,(B) 1,(C) 2-GROUND :
(B) 5, (C) 9-GROUND,(B) 12,(C) 10-GROUND :
(B) 11, (D) 12-GROUND,(B) 10,(D) 13-GROUND :
(B) 22, (D) 25-GROUND,(B) 21,(D) 26-GROUND :
(B) 2,(D) 11-GROUND :
(B) 13,(D) 24-GROUND :
(A) 2, (D) 10-GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(A) 12, (D) 21-GROUND : APPROX. 12 VOLTS WITH BRAKE PEDAL DEPRESSED
(D) 22-GROUND : ALWAYS APPROX. 12 VOLTS
A21, A22 ABS SPEED SENSOR REAR LH, RH
1-2 : APPROX. 0.8-1.2 KW (20
C, 68
F)
P 2 PARKING BRAKE SW
1-GROUND : CLOSED WITH PARKING BRAKE LEVER PULLED UP
S 5 STOP LIGHT SW
2-1 : CLOSED WITH BRAKE PEDAL DEPRESSED
ALWAYS CONTINUITYAPPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
AND ABS WARNING LIGHT GOES OFF
SYSTEM OUTLINE
SERVICE HINTS