TOYOTA RAV4 1996 Service Repair Manual

D02258
Drain
Drain Line
Pressure
Q08777
(+)
(+)
(−) (−)
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−201
1996 RAV4 (RM447U)
DTC P0770 Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor and
air flow meter to monitor the engagement condition of the lock−
up clutch
Then the ECM compares the engagement condition of the
lock−up clutch with the lock−up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SL,
valve body and torque converter clutch.
DTC No.DTC Detecting ConditionTrouble Area
P0770
Lock−up does not occur when driving in the lock−up range
(normal driving at 80 km/h (50 mph)), or lock−up remains ON
in the lock−up OFF range (2 trip detection logic)Shift solenoid valve SL is stuck open or closed
Valve body blocked up or stuck
Lock−up clutch
INSPECTION PROCEDURE
1 Check shift solenoid valve SL operation.
PREPARATION:
Remove the shift solenoid valve SL from the valve body.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve open.
(b) When battery positive voltage is supplied to the solenoid
valve, check that solenoid valve does not leak air.
NG Replace shift solenoid valve SL.
OK
DI411−01

DI−202
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check valve body (See page DI−192).
NG Repair or replace valve body.
OK
Repair torque converter clutch (See page
AX−22).

D02260
Shift Solenoid
Valve SL Transaxle
E15
Y−B
E41
SLB+ ECM
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−203
1996 RAV4 (RM447U)
DTC P0773 Shift Solenoid E Electrical Malfunction
(Shift Solenoid Valve SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock−up relay valve, which then controls operation of the lock−up clutch.
Fail Safe Function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
DTC No.DTC Detecting ConditionTrouble Area
P0773
Either (a) or (b) is 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 SL circuit
Shift solenoid valve SL
ECM
WIRING DIAGRAM
DI412−01

Q08090
SL
Q08857
Solenoid
ConnectorSL
SL
DI−204
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Measure resistance between terminal SL of ECM and body ground.
PREPARATION:
Disconnect the connector from the ECM.
CHECK:
Measure the resistance between terminal SL 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 SL of the ECM and termi-
nal SL of solenoid connector.
OK:
There is no open or short circuit.
NG Repair or replace harness or connector.
OK

D02262
(+)
(−)
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−205
1996 RAV4 (RM447U)
3 Check shift solenoid valve SL.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the shift solenoid valve SL connector.
(d) Remove the shift solenoid valve SL.
CHECK:
Measure the resistance between the solenoid connector and
solenoid 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 SL makes operations noise.
NG Replace shift solenoid valve SL.
OK
Check and replace or repair solenoid wire.

D02263
RotorFront Speed Sensor
NS
ECMFront Speed Sensor
Ring Gear
D02264
0 V
5 V/div
2 mec./division DI−206
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
DTC P1700 Speed sensor No. 2 Circuit Malfunction
(Front Speed Sensor)
CIRCUIT DESCRIPTION
The front speed sensor detects the vehicle speed based on revolution of the ring gear and sends signals
to the ECM. An AC voltage is generated in the front speed sensor coil as the ring rear mounted on the ring
gear rotates, and this voltage is sent to the ECM.
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
P1700
All condition below are detects 5,400 times or more continu-
ously
(a) No signal from front speed sensor is input to ECM while 4
pulses of rear speed sensor is sent
(b) Vehicle speed: 18 km/h (11 mph) or more for at 4 sec.
(c) Park / neutral position switch:
OFF (Other than P or N position)
Open or short in front speed sensor circuit
Front speed sensor
ECM
Reference:
Wavefrom between terminals FR
+ and FR− when vehicle speed
is approx. 20 km/h (13 mph).
DI414−01

D02265
Front Speed Sensor V3 2
V3
1Y−R
W−R
E47 E48ECM
4 − 6 V
FR
−
FR+
D02266
FR+FR−
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−207
1996 RAV4 (RM447U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check vehicle speed value or resistance between terminals FR+ and FR− of ECM.
When using OBD II scan tool or TOYOTA hand−held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect an OBDII scan tool or TOYOTA hand−held tester
to the DLC3.
(c) Turn the ignition switch ON and OBD II scan tool or TOY-
OTA hand−held tester main switch ON.
CHECK:
Drive the vehicle and read vehicle speed value.
OK:
Vehicle speed matches tester speed value.
When not using OBD II scan tool or TOYOTA hand−held tes-
ter:
CHECK:
Check the resistance between terminals FR+ and FR− of the
ECM.
OK:
Resistance: 560 − 680 Ω
OK Check and replace ECM.
NG

D02267
Magnet1
2
DI−208
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
1996 RAV4 (RM447U)
2 Check front speed sensor.
PREPARATION:
Remove the front speed sensor from the transaxle.
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor.
OK:
Resistance: 560 − 680 Ω
Reference:
Check the front transaxle revolution 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 front
speed sensor then taken away quickly.
OK:
Voltage is generated intermittently.
HINT:
The generated voltage is extremely low.
NG Replace front speed sensor.
OK
Check and repair harness and connector be-
tween ECM and front speed sensor.

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