1996 TOYOTA RAV4 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

N17923
STOP Fuse
N14648N17895I09112
(+)
5
4
Control
Plate
(−)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−341
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check STOP fuse.
PREPARATION:
Remove STOP fuse from fuse block.
CHECK:
Check continuity of STOP fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the STOP fuse (See at-
tached wiring diagram).
OK
2 Check actuator magnetic clutch.
PREPARATION:
(a) Remove cruise control actuator.
(b) Disconnect actuator connector.
CHECK:
Move the control plate by hand.
OK:
Control plate moves. (Magnetic clutch off)
CHECK:
(a) Connect positive + lead to terminal 5 and negative − lead
to terminal 4 of actuator connector.
(b) Move the control plate by hand.
NOTICE:
Do not connect the high tension cables to the wrong bat-
tery terminal.
You will damage the cruise control actuator.
OK:
Control plate does not move. (Magnetic clutch on)
NG Replace actuator assembly.
OK

BE1444BE6234I09113
2
1
43
Switch Pin
DI−342
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
3 Check stop light switch.
PREPARATION:
Disconnect stop light switch connector.
CHECK:
Check continuity between terminals.
OK:
Switch positionTerminal No. to continuity
Switch pin free
(Brake pedal depressed)1 − 2
Switch pin pushed in
(Brake pedal released)3 − 4
NG Replace stop light switch.
OK
4 Check for open and short in harness and connectors between ECU and stop
light switch, stop light switch and magnetic clutch, magnetic clutch and body
ground (See page IN−30).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on matrix chart (See page DI−336).
However, when DTC 12 is displayed, check harness and connector for loose connection.
If connection is normal, check and replace ECU.

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

N14696
BE3840N17426I09114
ON
(−)
VR2 (+)VR3Deceleration
Side
Acceleration
Side
Control
Plate
DI−344
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check voltage between terminals VR2 and VR3 of ECU connector.
PREPARATION:
Remove ECU with connectors still connected.
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminals VR2 and VR3 of
ECU connector while turning control plate slowly by hand
from the deceleration side to the acceleration side.
OK:
Voltage:
Fully closed: approx. 1.3 V
Fully opened: approx. 4.0 V
Note: As the control plate is turned, the voltage
should increase gradually without interruption.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG

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.