TOYOTA RAV4 1996 Service Repair Manual

Q08599
Line
Pressure
Drain
Q08590
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−151
1996 RAV4 (RM447U)
DTC P0770 Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The ECM uses signals from the throttle position sensor, air−flow
meter and crankshaft position sensor to monitor the engage-
ment 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)) 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 is blocked up or stuck
Lock−up clutch
INSPECTION PROCEDURE
1 Check shift solenoid valve SL operation.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve SL.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve leak air.
(b) When battery positive voltage is supplied to the solenoid
valve, check it close.
NG Replace shift solenoid valve SL.
OK
DI40J−01

DI−152
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
2 Check valve body (See page DI−141).
NG Repair or replace valve body.
OK
Replace torque converter clutch (See page
AX−14).

Q06971
Solenoid Valve SLTransaxle
E1
E4ECM
B+
SL 2
1
Y−B
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−153
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
DI40K−01

Q08090SL
Q08591
SL
SL
DI−154
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
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 the solenoid connector.
OK:
There is no open or short circuit.
NG Repair or replace harness or connector.
OK

Q08592Q08593D04176
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−155
1996 RAV4 (RM447U)
3 Check shift solenoid valve SL.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve SL.
CHECK:
Measure the resistance between the solenoid connector and
solenoid body.
OK:
Resistance: 11 − 15 Ω
CHECK:
Connect or positive  lead to terminal of the solenoid connec-
tor, negative  lead to the solenoid body.
OK:
The shift solenoid valve SL makes operation noise.
NG Replace shift solenoid valve SL.
OK
Check and replace or repair solenoid wire.

Q08868
To ST Relay DI−156
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
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 N, R, 2 or L
position (2 trip detection logic)
Short in park/neutral position switch circuit
Park/neutral position switch
ECMWhen 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
WIRING DIAGRAM
DI40M−02

BE3840Q08598D04553
ON
NSW (+) (−)
RL 2
Position
10 − 14 V NSW −
Body ground
Below 0 V
10 − 14 V*
10 − 14 V
10 − 14 V
10 − 14 V 10 − 14 V 10 − 14 V* P, N
R
D
2
LBelow 0 VBelow 0 VBelow 0 V
Below 0 V
Below 0 V
Below 0 V Below 0 VBelow 0 V Below 0 V Below 0 V
Below 0 V
Below 0 V R −
Body ground2 −
Body groundL −
Body ground
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−157
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check PNP SW, REVERSE, 2ND and LOW signal.
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 positions, and read the
PNPSW, 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 using TOYOTA hand−held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals NSW, R, 2, L of the
ECM and body ground when the shift lever is shifted to the fol-
lowing positions.
OK:
*: The voltage will drop slightly due to lighting up of the back up
light.
OK Check an replace the ECM.
NG

Q08076
DI−158
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
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
3 Check harness and connector between battery and park/neutral position switch,
and ECM and park/neutral position switch (See page IN−30).
NG Repair or replace harness and connector.
OK
Check and replace ECM.

Q08870
Fuse Block
Junction Connector
FL Block
Stop Light RH Stop Light LHTo ABS ECU
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−159
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
DI98Q−03

A00420
Brake Pedal
Depressed ON
Brake Pedal
Released
ON
STP
(+)
(−)
DI−160
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
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−141).
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.