sensor TOYOTA RAV4 1996 Service Repair Manual

N17894
Cruise Control
Actuator
457
16 IB2 STOP FuseStop Light SwitchCruise Control ECU
STP−
L
L− 26 1016 1
3 4 2
G−W
G−B
L−B L−B R−Y
R−Y R−W
GNDL
IB2 DI−340
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or vehicle speed sensor, etc. during cruise con-
trol, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the
magnetic clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the set speed, then
cruise control at the set speed is resumed.
DTC No.Detection ItemTrouble Area
12Short in magnetic clutch circuit
Open (0.8 sec.) in magnetic clutch circuit
Cruise contorl actuator magnetic clutch
Harness or connector between ECU and magnetic clutch,
magnetic clutch and body ground
ECU
STOP Fuse
WIRING DIAGRAM
DI42O−02

N07460
Cruise Control Actuator
IB2
VR1
VR2
VR3L−O
LG
L−RL−R LG L−OVR1
VR2
VR3 25 24 23 1
2
319
18
17Cruise Control ECU
IB2
IB2 Position
Sensor
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−343
1996 RAV4 (RM447U)
DTC 13, 14 Actuator Position Sensor Circuit
CIRCUIT DESCRIPTION
The circuit detects the rotation position of the actuator control plate and sends a signal to the ECU.
DTC No.Detection ItemTrouble Area
13Position sensor detects abnormal voltageCruise control actuator motor
Cruise control actuator position sensor
Harness or connector between actuator position sensor and
body ground
Harness or connector between actuator motor and ECU
 ECU
14
Open in actuator motor circuit
Position sensor signal value does not change when the motor
operates
WIRING DIAGRAM
DI42P−02

N17426N14650I22688
Acceleration
SideDeceleration
Side
Control
Plate1
2
3
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−345
1996 RAV4 (RM447U)
2 Check actuator position sensor.
PREPARATION:
(a) Remove cruise control actuator.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between actuator terminals 1 and 3 of ac-
tuator connector.
OK:
Resistance: Approx. 2.2 kΩ
CHECK:
Measure resistance between terminals 2 and 3 of actuator con-
nector, while turning the control plate slowly by hand from the
deceleration side to the acceleration side.
OK:
Resistance:
Fully closed: Approx. 530 kΩ
Fully opened: Approx. 2.0 kΩ
Note: As the control plate turns, the resistance
should increase gradually without interruption.
NG Replace actuator assembly.
OK
3 Check for open and short in harness and connector between ECU and actuator
position sensor (See page IN−30).
NG Repair or replace harness or connector.
OK
Check harness and connector for loose con-
nection. If connection is normal check and
replace ECU.

I00292
4 pulse/
1 rotation
of rotor shaft4 pulse/
1 rotation
of rotor shaft
ECUOD/TRIP METER
Cruise Control ECU
Vehicle Speed Sensor
N17896
Combination
Meter
ECMV−WV−WCruise Control
ECU
SPD 20
E69
SPD+S
V−W DI−346
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
DTC 21 Vehicle Speed Sensor Circuit
CIRCUIT DESCRIPTION
The vehicle speed sensor signal is sent to the cruise control ECU as the vehicle speed signal.
The rotor shaft in driven by the gear of the transaxle.
For each rotation of the shaft, the speed sensor sends a 4−pulse signal to the combination meter.
This signal is converted inside the combination meter and sent as a 4−pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
DTC No.Detection ItemTrouble Area
21Speed signal is not input to the ECU while cruise control is set
Vehicle speed sensor
Combination meter
Harness or connector between speed sensor and combina-
tion meter, combination meter and ECU
ECU
23Vehicle speed sensor pluse is abnormal
Vehicle speed sensor
Harness or connector (SPD)
ECU
WIRING DIAGRAM
DI42Q−02

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

BE3840N17439N14699I09119
ON
IDL (−) (+)
N17439
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−355
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check voltage between terminal IDL of ECU connector and body ground.
PREPARATION:
(a) Remove cruise control ECU with connectors still con-
nected.
(b) Disconnect ECM and ABS & TRAC ECU connector.
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminal IDL of ECU connector
and body ground, when the throttle valve is fully closed
and fully opened.
OK:
Throttle valve positionVoltage
Fully opened10 − 16 V
Fully closedBelow 1 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG
2 Check throttle position sensor.
PREPARATION:
Disconnect throttle position sensor connector.
CHECK:
Measure resistance between terminals 1 and 2 of throttle posi-
tion sensor connector, when the throttle valve is fully closed and
fully opened.
OK:
Throttle valve positionResistance
Fully opened1 MΩ or higher
Fully closedBelow 500 Ω
NG Replace throttle position sensor.
OK

DI−356
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
3 Check for open and short in harness and connector between ECU and throttle
position sensor, throttle position sensor and body ground (See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECU.

N21699
Ignition
Switch
1D 1F1E
1A
1D 1K9
22 4 247
466
B 14
BB
Junction
Connector W−BW−B
13
GND W
IG
Fuse Block
ALT
100 A
BatteryJ/B No.1R/B No.2 J/B No.1
J/B No.1Cruise Control
ECU
Fuse Block
ECU−IG
7.5 AB−Y B−Y
W
B−Y
AM1
40 AW DI−366
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc., Terminal GND and the cruise con-
trol ECU case are grounded.
WIRING DIAGRAM
DI42X−02

S01453
Port B
Port C
S01454
Port A
Port BPort C EC−6
− EMISSION CONTROLEVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1996 RAV4 (RM447U)
(d) Apply vacuum (3.43 kPa, 26 mmHg, 1.01 in.Hg) to port B,
check that the vacuum does not decrease when port C is
closed, and check that the vacuum decreases when port
C is released.
(e) While holding port C closed, apply vacuum (1.23 kPa, 9.2
mmHg, 0.36 in.Hg) to port A and check that air flows into
port B.
If a problem is found, replace the charcoal canister.
(f) Remove the plug.
7. RECONNECT EVAP HOSES
8. INSPECT VSV FOR EVAP (See page SF−45)
9. INSPECT VSV FOR VAPOR PRESSURE SENSOR (See
page SF−47)
10. INSPECT VAPOR PRESSURE SENSOR (See page
SF−55)