1996 TOYOTA RAV4 ECU

− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−337
1996 RAV4 (RM447U) O/D does not Resume, even through the road is not uphill.
1. Electronically Controlled Transaxle Communication
Circuit
2. Cruise Control ECUDI−357
IN−30
DTC memory is erased.1. Back−up Power Source Circuit
2. Cruise Control ECUDI−369
IN−30
DTC is not output, or is output when is should not be.1. Cruise Control ECUIN−30
Cruise MAIN indicator light remains ON or fails to light up.Combination meter troubleshooting on page BE−2

DI42N−02
Duty Ratio =A + BA
x 100 (%)
ON
OFFA
B
1 cycle
N07458
Cruise Control
Actuator
Motor5
Limit SwitchCruise Control
ECU
R−B 7
6
612
R−G R−G R−B
IB2
IB2MC
MO 11
DI−338
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
CIRCUIT INSPECTION
DTC 11, 14 Actuator Motor Circuit
CIRCUIT DESCRIPTION
The actuator motor is operated by signals from the ECU. Acceleration and deceleration signals are trans-
mitted by changes in the Duty Ratio (See note below).
Duty Ratio:
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity
in one cycle, and B is the period of non−continuity, then.
DTC No.Detection ItemTrouble Area
11Short in motor circuitCruise control actuator motor
Harness or connector between actuator motor and ECU
ECU
14Open in actuator motor circuit
WIRING DIAGRAM

N14648N17426I09111
Acceleration
SideDeceleration
Side
Control
Plate (+)5
4
(−)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−339
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check actuator motor.
PREPARATION:
(a) Remove cruise control actuator.
(b) Disconnect actuator connector.
CHECK:
(a) Connect positive + lead to terminal 5 and negative − lead
to terminal 4 of actuator connector (Magnetic clutch ON).
NOTICE:
Do not connect the high tension cables to the wrong bat-
tery terminal.
You will damage the cruise control actuator.
(b) When battery positive voltage is applied to each terminal
of actuator connector, check that the control plate moves
smoothly without hesitating.
Moving directionTerminal No. to connect
Acceleration sidePositive + − 6Negative − − 7
Deceleration sidePositive + − 7Negative − − 6
(c) With the motor rotating as in 2., check that the motor is
stopped by limit switches when the control plate moves to
fully opened or fully closed position.
NG Replace actuator assembly.
OK
2 Check harness and connector between cruise control ECU and actuator motor
(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 11, 14 is displayed, check and replace cruise control ECU.

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

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.