TOYOTA RAV4 1996 Service Repair Manual

D02302
Cruise Control ECU
OD
C169
Y−B
E620
OD14 − 6 V ECM
D02303
ON
(−)
(+)OD1
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−221
1996 RAV4 (RM447U)
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving uphill with cruise control activated, in order to minimize gear shifting and provide smooth cruis-
ing, O/D may be prohibited temporarily in some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels O/D shifting
until these signals are discontinued.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminal OD1 of ECM and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal OD1 of the ECM and
body ground.
OK:
Voltage: 4 − 6 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−192).
NG
DI419−01

D02305
ON
Cruise Control ECU
(−)(+)
OD
DI−222
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check voltage between terminal OD of cruise control ECU harness side connec-
tor and body ground.
PREPARATION:
(a) Disconnect the cruise control ECU connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal OD of the cruise control
ECU harness side connector and body ground.
OK:
Voltage: 4 − 6 V
OK Check and replace cruise control ECU (See
page
IN−30).
NG
3 Check harness and connector between cruise control ECU and ECM (See page
IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

Q08869
Junction Connector Fuse Block
FL Block Junction Connector
O/D Main Switch*
O/D Main switch
Contacts go open with switch pushed in.
Contacts go closed with switch pushed once again. *:
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−223
1996 RAV4 (RM447U)
O/D Main Switch & O/D OFF Indicator Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go close when it is pushed once
again. In O/D main switch at the OFF position, the O/D OFF indicator light lights up, and the ECM prohibits
shifting to O/D.
WIRING DIAGRAM
DI41A−02

BE3840Q02238AT5623D04178
ON
OFF ON
O/D ButtonO/D OFF
Indicator lightO/D Main
Switch Point ON
OFF
ON OFF
DI−224
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
O/D OFF indicator light does not light up:
1 Check operation of O/D main switch.
CHECK:
(a) Turn the ignition switch ON.
(b) Check the ”O/D OFF” indicator light when the O/D button
is pushed to ON.
OK:
”O/D OFF” indicator light goes off.
(c) Check the ”O/D OFF” indicator light when the O/D button
is pushed again, to OFF.
OK:
”O/D OFF” indicator light lights up.
NG Go to step 4.
OK

D02307
ON
(−)
(+)OD2
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−225
1996 RAV4 (RM447U)
2 Check OVERDRIVE CUT SW2 signal.
When using TOYOTA hand−held tester:
PREPARATION:
(a) Connect a TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Read the OVERDRIVE CUT SW2 signal on the TOYOTA
hand−held tester.
OK:
O/D main switch pushed in:
OVERDRIVE CUT SW2 .......... ON
O/D main switch pushed once again:
OVERDRIVE CUT SW2 .......... OFF
When not using TOYOTA hand−held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Check the voltage between terminal OD2 of the ECM and body
ground.
OK:
O/D Main SwitchVoltage
OFFBelow 1 V
ON10 − 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−192).
NG
3 Check harness and connector between O/D OFF indicator light and ECM (See
page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

D02308
2
4
DI−226
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
4 Check O/D main switch.
PREPARATION:
(a) Disconnect the O/D main switch connector.
(b) Measure the resistance between terminals 2 and 4 of the
O/D main switch connector.
OK:
O/D Main SwitchResistance
ON∞ Ω (open)
OFF0 Ω (continuity)
NG Replace O/D main switch.
OK
Check and replace combination meter (See
page BE−37).
O/D OFF indicator light remains ON:
1 Check O/D main switch.
NG Replace O/D main switch.
OK
2 Check harness and connector between O/D OFF indicator light and O/D main
switch, and O/D OFF indicator light and ECM (See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

Q08870
Fuse Block
Junction Connector
FL Block
Stop Light RH Stop Light LHTo ABS ECU
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−227
1996 RAV4 (RM447U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock−up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to ECM. Then the ECM cancels of the lock−up
clutch while braking is in progress.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check if the stop lights go on and off normally when the brake pedal is operated and released.
NG Check and repair stop light circuit.
OK
DI994−01

A00420
Brake Pedal
Depressed ON
Brake Pedal
Released
ON
STP
(+)
(−)
DI−228
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check STP signal.
When using OBD II scan tool or TOYOTA hand−held tester:
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand−held tes-
ter to the DLC3
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Read the STP signal on the TOYOTA hand−held tester.
OK:
Brake PedalSTP Signal
DepressedON
ReleasedOFF
When not using OBD II scan tool or TOYOTA hand−held tes-
ter:
CHECK:
(a) Turn the ignition switch ON.
(b) Check the voltage between B/K of the ECM and body
ground.
OK:
Brake PedalVoltage
Depressed7.5 − 14 V
ReleasedBelow 1.5 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−192).
NG
3 Check harness and connector between ECM and stop light switch (See page
IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

Q08867
Junction Connector
Fuse Block
FL Block
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−229
1996 RAV4 (RM447U)
Pattern Select Switch Circuit
CIRCUIT DESCRIPTION
The ECM memory contains the shift programs for the NORMAL and POWER patterns, 2 and L position and
the lock−up patterns. Following the programs corresponding to the signals from the pattern select switch,
the park / neutral position switch and other various sensors, the ECM switches the solenoid valves ON and
OFF, and control the transmission gear change and the lock−up clutch operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of PWR indicator light.
CHECK:
Check if the PWR indicator light normally when the pattern select switch is set to NORM and PWR position.
OK:
Pattern select switchPWR indicator light
PWRLight up
NORMGoes off
NG Check and repair PWR indicator light (See page
BE−37).
OK
DI41B−02

D02309
ON
(−)
(+)P
DI−230
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check PATTERN SEL SW2
When using TOYOTA hand−held tester:
PREPARATION:
(a) Connect a TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Read the PATTERN SEL SW2 signal on the TOYOTA hand−
held tester.
OK:
Pattern select switch pushed in:
PATTERN SEL SW2 ..........ON
Pattern select switch pushed once again:
PATTERN SEL SW2 ..........OFF
When not using TOYOTA hand−held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure voltage between terminal P of ECM and body ground
when the pattern select switch is set to the PWR (POWER)
position and NORM (NORMAL) position.
OK:
Pattern Select SwitchVoltage
PWR7.5 − 14 V
NORMBelow 1 V
HINT:
The ECM uses the normal pattern signal if the power signal is
not input.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−192).
NG