TOYOTA RAV4 1996 Service Repair Manual

− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−211
1996 RAV4 (RM447U)
Check and repair harness and connector be-
tween ECM and rear speed sensor.

Q08871
Shift Solenoid
Valve STTransaxle
E1IG2
E6 13
LG 12 1
LG STB+ ECM DI−212
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
DTC P1760 Linear Solenoid for Line Pressure Control
Circuit Malfunction (Shift Solenoid Valve ST)
CIRCUIT DESCRIPTION
When the difference in speed between the front wheels and rear wheels is large, and this takes place during
an extreme low−speed operation in the D, 2, or L position, shift solenoid valve ST is turned ON by the signal
from the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1760
Either (a) or (b) are detected for 1 time (2 trip detection logic)
(a) Solenoid resistance is 8 Ω or less short circuit when sole-
noid is energized
(b) Solenoid resistance is 100 kΩ or more open circuit when
solenoid is not energized
Open or short in shift solenoid valve ST circuit
Shift solenoid valve ST
ECM
WIRING DIAGRAM
DI416−01

Q08888
ST
Q08891
ST
ST
Solenoid Connector
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−213
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Measure resistance between terminal ST of ECM and body ground.
PREPARATION:
Disconnect the connector from the ECM.
CHECK:
Measure the resistance between terminal ST of the ECM and
body ground.
OK:
Resistance: 11 − 15 Ω
OK Check and replace ECM.
NG
2 Check harness and connector between ECM and automatic transaxle solenoid
connector.
PREPARATION:
(a) Disconnect the connector from the ECM.
(b) Disconnect the solenoid connector from the automatic
transaxle.
CHECK:
Check the harness between terminal ST of the ECM and termi-
nal of the ST solenoid connector.
OK:
There is no open or short circuit.
NG Repair or replace harness or connector.
OK

D02274
(+)
(−)
DI−214
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
3 Check shift solenoid valve ST.
PREPARATION:
(a) Jack−up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the shift solenoid valve ST connector.
(d) Remove the shift solenoid valve ST.
CHECK:
Measure the resistance between solenoid connector and sole-
noid body.
OK:
Resistance: 11 − 15 Ω
CHECK:
Connect positive  lead to terminal of the solenoid connector,
negative  lead to the solenoid body.
OK:
The shift solenoid valve ST makes operations noise.
NG Replace shift solenoid valve ST.
OK
Check and replace or repair solenoid wire.

D02275
Current flow to solenoid Center
Differential
Control
Pressure
ON
OFF
1 cycleDuty Ratio =
A + B
A
x 100 (%)
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−215
1996 RAV4 (RM447U)
DTC P1770 Differential Lock Solenoid No. 1 Circuit
Malfunction (Shift Solenoid Valve SLD)
CIRCUIT DESCRIPTION
Shift solenoid valve SLD controls the oil pressure applied to the
center differential clutch and maintains the limited slip differen-
tial effects at most appropriate level.
The ECM determines optimum control pressure according to
the signals from the throttle position sensor, front and rear
transaxle revolution sensor and control volume of current flow
to the shift solenoid valve.
The amount of current flow to the solenoid valve is controlled
by the duty ratio* of the ECM output signal. The higher the duty
ratio becomes, the higher the center differential control pres-
sure becomes during the center differential control operation.
*: 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.DTC Detection ConditionTrouble Area
P1770
All conditions below are detected 1 sec. or more
(2 trip detection logic)
(a) SLD output signal’s duty ON of 3.3 msecs. or more with
duty ratio of at least 5 % lasts
(b) B
+ voltage: 11 V or more
Open or short in shift solenoid valve SLD circuit
Shift solenoid valve SLD
ECM
DI417−01

D02276
S1 3
S1 1Shift Solenoid
Valve SLD
BR−B
IG214 IG213
L−B
L−B
E6
E62
SLD−
SLD+
B+ ECM
BR−B3
D02277
2
1
2
1
DI−216
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check shift solenoid valve SLD.
Check solenoid resistance:
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the sole-
noid connector.
OK:
Resistance: 5.1 − 5.5 Ω
Check solenoid operation:
CHECK:
Connect positive  lead with an 8 − 10 W bulb to terminal 1 of
the solenoid connector and nagative  lead to terminal 2, then
check the movement of the valve.
OK:
When battery positive voltage is appliedValve moves in → direction in illumina-
tion (on the left)
When battery positive voltage is cut offValve moves in ← direction in illumina-
tion (on the right)

D02312
(−)
(+)2
1
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−217
1996 RAV4 (RM447U)
Reference
Check the solenoid’s operation:
CHECK:
(a) Prepare a variable power supply.
(b) Connect positive  lead of the variable power supply to
terminal 1 of the solenoid connector and negative  lead
to terminal 2.
(c) Check the movement of the valve when the voltage is
gradually increased (A current greater than 1A should not
be supplied.).
OK:
As the voltage is increased, the valve should move
slowly in the → direction
(d) Check the movement of the valve when the voltage is cut
off.
OK:
The valve should return in the ← direction.
NG Replace solenoid valve SLD.
OK
2 Check harness and connector between shift solenoid valve SLD and ECM (See
page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

Q08868
To ST Relay DI−218
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
DTC P1780 Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
The ECM receives signals (NSW, R, 2 and L) from the park/neutral position switch. When the signal is not
sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in the D position.
DTC No.DTC Detecting ConditionTrouble Area
P1780
2 or more switches are ON simultaneously for the N, R, 2 and
L positions (2 trip detection logic)
When driving under conditions (a), (b) and (c) for 30 sec. or
more, the park/neutral position switch is ON (N position).
(2 trip detection logic)
(a) Vehicle speed: 80 km/h (50 mph) or more
(b) Engine speed: 1,500 ∼ 3,000 rpm
(c) Manifold absolute pressure: 450 mmHg or more
Short in park/neutral position switch circuit.
Park/neutral position switch
ECM
WIRING DIAGRAM
DI418−02

D02301
NSW
R
L ON
2
Position
P, N
R
D
2
LNSW −
Body ground
Below 1 V
10 − 14 V*
10 − 14 VBelow 1 V Below 1 V Below 1 V
Below 1 V
Below 1 V
Below 1 V Below 1 V
Below 1 V
Below 1 V Below 1 V
Below 1 V
Below 1 V 10 − 14 V
10 − 14 V 10 − 14 V 10 − 14 V*
10 − 14 V R −
Body ground2 −
Body groundL −
Body ground
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−219
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check PNP SW, REVERSE, 2ND and LOW signals.
When using TOYOTA hand−held tester:
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Shift the shift lever to the P, R, N, 2 or L, and read the PNP SW,
REVERSE, 2ND and LOW signals on the TOYOTA hand−held
tester.
OK:
Shift positionSignal
P, NPNP SW OFF → ON
RREVERSE OFF → ON
22ND OFF → ON
LLOW OFF → ON
When not using TOYOTA hand−held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals NSW, R, 2, and L of
ECM and body ground when the shift lever is shifted to the fol-
lowing positions.
OK:
*: Voltage will drop slightly due to lighting up of the back up light.
OK Check an replace ECM.
NG

Q08076
DI−220
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check park/neutral position switch.
PREPARATION:
Disconnect the park/neutral position switch connector.
CHECK:
Check the continuity between each terminal shown below when
the shift lever is moved to each position.
Shift positionTerminal No. to continuity
P2 − 75 − 6
R2 − 8
N2 − 95 − 6
D2 − 10
22 − 3
L2 − 4
NG Replace park/neutral position switch.
OK
Repair or replace harness and connector between battery and park/neutral position switch, and
park/neutral position switch and ECM.