1996 TOYOTA RAV4 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.

N17897
DI−348
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
DTC 32 Control Switch Circuit
(Cruise Control Switch)
CIRCUIT DESCRIPTION
This circuit carries the SET/COAST, RESUME/ACCEL and CANCEl signals (each voltage) to the ECU.
DTC No.Detection ItemTrouble Area
32Short in, control switch circuit
Voltage abnormality in control switchCruise control switch
Harness or connector between control switch and ECU
ECU
WIRING DIAGRAM
DI42R−02

SET/COAST
SWITCH
RESUME/ACCEL
SWITCH
CANCEL
SWITCH
ON
OFF Input SignalIndicator light
blinking pattern
ON
OFF
ON
OFF2 Pulse
3 Pulse
Switch OFF
Switch ON
BE3840N14697I09116
ON
(−)
CCS
(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−349
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Input signal check.
PREPARATION:
(a) See input signal check on page DI−328.
(b) Check the indicator light operation when each of the SET/
COAST, RESUME/ACCEL and CANCEL is turned ON.
OK:
SET/COAST, RESUME/ACCEL switch:
The signals shown in the table on the left should be
output when each switch is ON. The signal should
disappear when the switch is turned OFF.
CANCEL switch:
The indicator light goes off when the cancel switch is
turned on.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG
2 Check voltage between terminal CCS of ECU connector and body ground.
PREPARATION:
Remove ECU with connectors still connected.
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminal CCS of ECU connec-
tor and body ground, when each of the SET/COAST, RE-
SUME/ACCEL and CANCEL is turned ON.
OK:
Switch positionVoltage
Neutral10 − 16 V
RES/ACC0.8 − 1.4 V
SET/COAST2.4 − 4.0 V
CANCEL5.1 − 8.3 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG

BE4061N15553I09117
43 Disconnect
DI−350
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 RAV4 (RM447U)
3 Check control switch.
PREPARATION:
(a) Remove steering wheel center pad (See page SR−12).
(b) Disconnect control switch connector.
CHECK:
Measure resistance between terminals 3 and 4 of control switch
connector when control switch is operated.
OK:
Switch positionResistance
Neutral1 MΩ or higher
RES/ACC50 − 80 Ω
SET/COAST180 − 220 Ω
CANCEL400 − 440 Ω
HINT:
When DTC 34 is displayed, carefully check that resistance is al-
ways ∞ in neutral position, particularly when switching between
RES/ACC and SET/COAST.
NG Replace cruise control switch.
OK
4 Check for open and short in harness and connector between ECU and control
switch (See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECU.

N17898
Ignition
SwitchSTOP FuseStop Light
SwitchCruise Control
ECU
STP−
L
L−
GNDL5
47 211
1F1I
IB2
IB2 16
L−BG−B10
2616 1
3 42
R−W R−WJ/B No.1
R−Y
L−BG−W
R−Y
10 A
Cruise Control
Actuator
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−351
1996 RAV4 (RM447U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake is on, battery positive voltage normally applies through the stop fuse and stop light switch
to terminal STP− of the ECU, and the ECU turns the cruise control off.
A fail−safe function is provided so that cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
If the harness connected to terminal STP− has an open, terminal STP− will have battery positive voltage and
the cruise control will be turned off, also SET not occurring.
Also, when the brake is on, the magnetic clutch is cut electrically by the stop light switch, turning the cruise
control off. (See page DI−338 for operation of the magnetic clutch)
WIRING DIAGRAM
DI42S−02

BE3840N16656I09118
ON
STP−
(−)(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−353
1996 RAV4 (RM447U)
3 Check voltage between terminal, STP− of ECU connector and body ground.
PREPARATION:
Remove ECU with connectors still connected.
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminal STP−of ECU connec-
tor and body ground, when the brake pedal is depressed
and released.
OK:
Pedal positionVoltage
Depressed10 − 16 V
ReleasedBelow 1 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−336).
NG
4 Check for open in harness and connectors between terminal STP− of ECU and
stop light switch (See page IN−30).
NG Repair or replace harness or connector.
OK
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