1996 TOYOTA RAV4 Speed sensor

Above 40 km/h
(25 mph)
Below 40 km/h
(25 mph)ON
OFF Vehicle speedIndicator light
blinking pattern
ON
OFFBlinks
Stays ON
0.25 sec.0.25 sec.
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−347
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Input signal check.
CHECK:
(a) See input signal check on page DI−328.
(b) Check indicator light operation when driving with vehicle
speed above 40 km/h (25 mph), and with vehicle speed
below 40 km/h (25 mph).
OK:
Vehicle speed above 40 km/h (25 mph):
Indicator light blinks
Vehicle speed below 40 km/h (25 mph):
Indicator light stays on
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG
2 Check speedometer circuit (See combination meter troubleshooting on page
BE−37).
NG Repair or replace vehicle speed sensor, har-
ness, connector or combination meter assem-
bly.
OK
Check harness and connector for loose con-
nection. If connection is normal, check and
replace ECU.

N17323
Throttle Position
Sensor2
L5
IG1L
21IDL12 V Cruise Control ECU DI−354
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
Idle Switch Circuit
CIRCUIT DESCRIPTION
When the idle switch is turned ON, a signal is sent to the ECU. The ECU uses this signal to correct the dis-
crepancy between the throttle valve position and the actuator position sensor value to enable accurate
cruise control at the set speed. If the idle switch is malfunctioning, problem symptoms also occur in the en-
gine, so also inspect the engine.
WIRING DIAGRAM
DI42T−02

17
E
1. NORMALLY
OPENOpens and
closes circuits,
thereby
stopping (1) or
allowing (2)
current flow.
RESISTOR
An electrical component with a
fixed resistance, placed in a circuit
to reduce voltage to a specific
value.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.
SENSOR (Thermistor)
A resistor which varies its
resistance with temperature.
SHORT PIN
Used to provide an unbroken
connection within a junction
block.
SOLENOID
An electromagnetic coil which
forms a magnetic field when
current flows, to move a plunger,
etc.SWITCH, DOUBLE THROW
A switch which continuously
passes current through one set
of contacts or the other.
SWITCH,
IGNITION
A key operated switch with
several positions which allows
various circuits, particularly the
primary ignition circuit, to
become operational.
Wires are always
drawn as straight lines
on wiring diagrams.
Crossed wires (1)
without a black dot at
the junction are not
joined; crossed wires
(2) with a black dot or
octagonal (
) mark at
the juction as spliced
(joined) connections. RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a
signal for activation of other
components.TRANSISTOR
A solid state device typically used
as an electronic relay; stops or
passes current depending on the
voltage applied at base.º SWITCH, WIPER PARK
Automatically returns wipers to
the stop position when the wiper
switch is turned off. SWITCH, MANUAL SPEAKER
An electromechanical device
which creates sound waves from
current flow.
2. NORMALLY
CLOSED
RESISTOR, VARIABLE OR
RHEOSTAT
A controllable resistor with a
variable rate of resistance.
Also called a potentiometer or
rheostat. 2. NORMALLY
OPEN RELAY
1. NORMALLY
CLOSEDBasically, an electrically
operated switch which may
be normally closed (1) or
open (2).
Current flow through a
small coil creates a
magnetic field which either
opens or closes an
attached switch.
(2) SPLICED WIRES
(1) NOT
CONNECTED

28
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
*1 : w/ A/C
*2 : w/o A/C
A 1 A/C Condenser Fan Motor E 1 Electronically Controlled Transmission Solenoid
A 2 A/C Magnetic Clutch and Lock Sensor E 2 Engine Coolant Temp. Sensor
A 3 A/C Triple Pressure SW (A/C Dual and Single
Pressure SW) F 1 Front Side Marker Light LH
A 4 A/C Water Temp. SW F 2 Front Side Marker Light RH
A 5 A/T Fluid Temp. SW F 3 Front Turn Signal Light LH and Front Parking
A 6 ABS Actuator Light LH
A 7 ABS Actuator F 4 Front Turn Signal Light RH and Front Parking
A 8 ABS Relay Light RH
A 9 ABS Relay F 5 Front Washer Motor
A 10 ABS Speed Sensor Front LH F 6 Front Wiper Motor
A 11 ABS Speed Sensor Front RH F 7 Fusible Link Block
B 1 Back-Up Light SW (M/T) G 1 Generator
B 2 Brake Fluid Level Warning SW G 2Generator
C 1 Center Diff. Lock Warning Buzzer SW H 1 Headlight LH
C 2 Crankshaft Position Sensor H 2 Headlight RH
C 3 Cruise Control Actuator H 3 Horn
D 1 Data Link Connector 1

29
G
Position of Parts in Engine Compartment
I 1 Idle Air Control Valve R 1Radiator Fan Motor
I 2 Igniter R 2 Rear Washer Motor
I 3 Ignition Coil and Distributor
I 4 Ignition Coil and Distributor S 1 Solenoid Valve SLD
I 5 Injector No. 1 S 2 Starter
I 6 Injector No. 2 S 3 Starter
I 7 Injector No. 3
I 8 Injector No. 4 T 1 Throttle Position Sensor
I 9 Intake Air Temp. Sensor
V 1 Vapor Pressure Sensor
K 1 Knock Sensor V 2 Vehicle Speed Sensor (Combination Meter)
V 3 Vehicle Speed Sensor (Front)
M 1 Manifold Absolute Pressure Sensor V 4 Vehicle Speed Sensor (Rear)
V 5 VSV (Center Diff. Lock No. 1)
N 1 Noise Filter (Ignition System) V 6 VSV (Center Diff. Lock No. 2)
V 7 VSV (EGR)
O 1 Oil Pressure SW V 8 VSV (EVAP)
O 2 Oxygen Sensor (Bank 1 Sensor 1) V 9 VSV (Vapor Pressure Sensor)
O 3 Oxygen Sensor (Bank 1 Sensor 2)
W 1 Water Temp. Sender
P 1 Park/Neutral Position SW (A/T)

32
G ELECTRICAL WIRING ROUTING
Position of Parts in Body
[2-Door]
A 21 ABS Speed Sensor Rear LH L 1 License Plate Light
A 22 ABS Speed Sensor Rear RH
P 3 Personal Light
B 7 Back Door Open Detection SW and Door Lock P 4 Power Window Master SW
Motor P 5 Power Window Motor (Driver's Side)
P 6 Power Window Motor (Front Passenger's Side)
D 6 Door Courtesy SW (Driver's Side) P 9 Power Window SW (Front Passenger's Side)
D 7 Door Courtesy SW (Front Passenger's Side)
D 10 Door Lock Control SW (Front Passenger's Side) R 8 Rear Combination Light LH
D 13 Door Lock Motor, Door Key Lock and Unlock SW R 9 Rear Combination Light RH
(Driver's Side) R 10Rear Side Marker Light LH
D 14 Door Lock Motor, Door Key Lock and Unlock SW R 11 Rear Side Marker Light RH
(Front Passenger's Side) R 12 Rear Speaker LH
R 13 Rear Speaker RH
F 9 Front Speaker LH R 14 Rear Window Defogger (+)
F 10 Front Speaker RH R 15 Rear Window Defogger (-)
F 11 Fuel Sender (Main) and Fuel Pump R 16 Rear Wiper Motor
F 12 Fuel Sender (Sub) R 17 Rear Wiper Relay
R 18 Remote Control Mirror LH
H 5 High Mounted Stop Light R 19 Remote Control Mirror RH
I 11 Interior Light

33
G
Position of Parts in Body
[4-Door]
A 21 ABS Speed Sensor Rear LH L 1 License Plate Light
A 22 ABS Speed Sensor Rear RH
P 3 Personal Light
B 7 Back Door Open Detection SW and Door Lock P 4 Power Window Master SW
Motor P 5 Power Window Motor (Driver's Side)
P 6 Power Window Motor (Front Passengerºs Side)
D 6 Door Courtesy SW (Driver's Side) P 7 Power Window Motor (Rear LH)
D 7 Door Courtesy SW (Front Passenger's Side) P 8 Power Window Motor (Rear RH)
D 8 Door Courtesy SW (Rear LH) P 9 Power Window SW (Front Passenger's Side)
D 9 Door Courtesy SW (Rear RH) P 10 Power Window SW (Rear LH)
D 10 Door Lock Control SW (Front Passenger's Side) P 11 Power Window SW (Rear RH)
D 11 Door Lock Motor (Rear LH)
D 12 Door Lock Motor (Rear RH) R 8 Rear Combination Light LH
D 13 Door Lock Motor, Door Key Lock and Unlock SW R 9 Rear Combination Light RH
(Driver's Side) R 10Rear Side Marker Light LH
D 14 Door Lock Motor, Door Key Lock and Unlock SW R 11 Rear Side Marker Light RH
(Front Passenger's Side) R 12 Rear Speaker LH
R 13 Rear Speaker RH
F 9 Front Speaker LH R 14 Rear Window Defogger (+)
F 10 Front Speaker RH R 15 Rear Window Defogger (-)
F 11 Fuel Sender (Main) and Fuel Pump R 16 Rear Wiper Motor
F 12 Fuel Sender (Sub) R 17 Rear Wiper Relay
R 18 Remote Control Mirror LH
H 5 High Mounted Stop Light R 19 Remote Control Mirror RH
I 11 Interior Light

64
ENGINE CONTROL
THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE ENGINE ETC. AN
OUTLINE OF ENGINE CONTROL IS GIVEN HERE.
1. INPUT SIGNALS
(1) ENGINE COOLANT TEMP. SENSOR SIGNAL SYSTEM
THE ENGINE COOLANT TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. AND HAS A BUILT-IN THERMISTOR WITH A
RESISTANCE WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP. THUS THE ENGINE COOLANT TEMP. IS INPUT IN
THE FORM OF A CONTROL SIGNAL TO TERMINAL THW OF THE ENGINE CONTROL MODULE.
(2) INTAKE AIR TEMP. SIGNAL SYSTEM
THE INTAKE AIR TEMP. SENSOR DETECTS THE INTAKE AIR TEMP. , WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA
OF THE ENGINE CONTROL MODULE.
(3) OXYGEN SENSOR SIGNAL SYSTEM
THE OXYGEN SENSOR DETECTS THE OXYGEN DENSITY IN THE EXHAUST EMISSION WHICH IS INPUT AS A CONTROL SIGNAL
TO TERMINALS OX1 AND OX2 OF THE ENGINE CONTROL MODULE.
(4) 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, OR WHEN THE VALVE IS FULLY CLOSED.
(5) VEHICLE SPEED CIRCUIT
THE VEHICLE SPEED IS DETECTED BY VEHICLE SPEED SENSOR INSTALLED IN THE TRANSMISSION AND THE SIGNAL IS INPUT
TO TERMINAL SPD OF THE ENGINE CONTROL MODULE VIA THE COMBINATION METER.
(6) PARK/NEUTRAL POSITION SW SIGNAL SYSTEM
THE PARK/NEUTRAL POSITION SW DETECTS WHETHER THE SHIFT POSITION IS IN NEUTRAL OR NOT, AND INPUTS A CONTROL
SIGNAL TO TERMINAL NSW OF THE ENGINE CONTROL MODULE.
(7) A/C SW SIGNAL SYSTEM
THE OPERATING VOLTAGE OF THE A/C MAGNETIC CLUTCH IS DETECTED AND INPUT IN THE FORM OF A CONTROL SIGNAL TO
TERMINAL ACI OF THE ENGINE CONTROL MODULE.
(8) BATTERY SIGNAL SYSTEM
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE. WHEN THE IGNITION SW IS
TURNED TO ON, VOLTAGE FOR THE ENGINE CONTROL MODULE OPERATION IS APPLIED VIA THE EFI MAIN RELAY TO
TERMINAL +B OF THE ENGINE CONTROL MODULE.
(9) INTAKE AIR VOLUME SIGNAL SYSTEM
INTAKE AIR VOLUME IS DETECTED BY THE MANIFOLD ABSOLUTE PRESSURE SENSOR AND IS INPUT AS A CONTROL SIGNAL
TO TERMINAL PIN OF THE ENGINE CONTROL MODULE.
(10) STARTER SIGNAL SYSTEM
TO CONFIRM THAT THE ENGINE IS CRANKING, THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING CRANKING IS
DETECTED AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL STA OF THE ENGINE CONTROL MODULE.
(11) ELECTRICAL LOAD SIGNAL SYSTEM
THE SIGNAL WHEN SYSTEMS SUCH AS THE REAR WINDOW DEFOGGER, HEADLIGHT, ETC. WHICH CAUSE A HIGH ELECTRICAL
BURDEN ARE ON IS INPUT TO TERMINAL ELS AS A CONTROL SIGNAL.
SYSTEM OUTLINE