1996 TOYOTA RAV4 Service Repair Manual

D02268
Rear Speed Sensor
Transfer
Drive
Gear
D02265
Rear Speed Sensor V4 2
1
V4L−Y
R−L
E5E5 14
13
RR
−
RR+
4 − 6 V ECM
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−209
1996 RAV4 (RM447U)
DTC P1715 Rear Wheel Sensor Circuit Malfunction
(Rear Speed Sensor)
CIRCUIT DESCRIPTION
The rear speed sensor detects the rear wheel speed based on
revolution of the transfer drive gear.
Its construction is the same as that of the front speed sensor
(See page DI−206).
The center differential clutch is controlled by the ECM based on
the signals from the front speed sensor and rear speed sensor
signals.
DTC No.DTC Detecting ConditionTrouble Area
P1715
All conditions below are detected 10 sec. or more
(2 trip detection logic)
(a) No signal rear speed sensor is input to ECM
(b) Vehicle speed: 30 km/h (19 mph) or more
(c) Park / neutral position switch:
OFF (Other than P or N position)
Open or short in rear speed sensor circuit
Rear speed sensor
ECM
WIRING DIAGRAM
DI415−01

D02269
RR+RR−
D02267
12
Magnet
DI−210
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check resistance between terminals RR+ and RR− of ECM.
CHECK:
Check the resistance between terminals RR+ and RR− of the
ECM.
OK:
Resistance: 560 − 680 Ω
OK Check and replace ECM.
NG
2 Check rear speed sensor.
PREPARATION:
Remove the rear speed sensor from transaxle.
CHECK:
Measure the resistance between terminals 1 and 2 of the revo-
lution sensor.
OK:
Resistance: 560 − 680 Ω
Reference:
Check the vehicle speed sensor’s function
CHECK:
Check the voltage between terminals 1 and 2 of the speed sen-
sor when a magnet is put close to the front end of the rear speed
sensor then taken away quickly.
OK:
Voltage is generated intermittently.
HINT:
The generated voltage is extremely low.
NG Replace rear speed sensor.
OK

− 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)