1996 TOYOTA RAV4 Cv axle

Q08586
(−) (+)
(−)
(+)
DI−146
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
DTC P0750, P0755 Shift Solenoid A/B Malfunction
(Shift Solenoid Valve No. 1 / No. 2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd or O/D
gear). The ECM then compares the actual gear with the shift schedule in the ECM memory to detect mechan-
ical trouble of the shift solenoid valves and valve body.
DTC No.DTC Detecting ConditionTrouble Area
P0750
P0755During normal driving, the gear required by the ECM does not
match the actual gear (2 trip detection logic)Shift solenoid valve No. 1 / No. 2 is stuck open or closed
Valve body is blocked up or stuck
HINT:
Check the shift solenoid valve No. 1 when DTC P0750 is output and check shift solenoid valve No. 2 when
DTC P0755 is output.
INSPECTION PROCEDURE
1 Check shift solenoid valve No. 1 or No. 2 operation.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve No. 1 or No. 2.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the shift solenoid valves do not leak air.
(b) When battery positive voltage is supplied to the shift sole-
noid valves, check they open.
NG Replace shift solenoid valve No. 1 or No. 2.
OK
2 Check valve body (See page DI−141).
NG Repair or replace valve body.
OK
Repair transaxle (See page AX−15).
DI40H−01

Position
DNORMAL
Solenoid valve
No. 2
ONGear
L 2ON ONOFF
ON OFF
OFF OFF
OFF ON
ON ON
OFF ON
ON OFF
ON ON1st
2nd
3rd
O/D
1st
2nd
3rd
1st
2ndSolenoid valve
No. 1 No. 2
X
X
X
X
X
X
X
X
XON
ON
ON
OFF
ON
ON
ON
OFF
ONGear
3rd
3rd
3rd
O/D
3rd
3rd
3rd
1st
2ndNo. 1 No. 2Solenoid valve
Gear
1st ON X
X
X
X
X
X
X
X
X OFF
OFF
OFF
ON ON OFF OFFON SHIFT SOLENOID NO.1
MALFUNCTIONINGSHIFT SOLENOID NO.2
MALFUNCTIONING
O/D
O/D
O/D
1st
1st
1stMALFUNCTIONING BOTH SOLENOIDS
Gear when shift selector is
manually operated
O/D
O/D
O/D
O/D
3rd
3rd
3rd
1st
1st
X: Malfunctions3rd
3rd No. 1
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−147
1996 RAV4 (RM447U)
DTC P0753, P0758 Shift Solenoid A/B Electrical Malfunc-
tion (Shift Solenoid Valve No. 1/No. 2)
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is done in combination with ON and OFF of the shift solenoid valves No. 1 and No.
2 controlled by ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls
the remaining normal shift solenoid valve to allow the vehicle to be operated safely (Fail safe function).
Fail Safe Function:
If either of the shift solenoid valve circuits develops an open or a short, the ECM turns the other shift solenoid
ON and OFF to shift to the gear positions shown in the table below. The ECM also turns the shift solenoid
valve SL OFF at the same time. If both solenoids are malfunction, hydraulic control cannot be done electroni-
cally so it must be done manually.
Manual shifting as shown in the following table must be done. (In the case of a short circuit, the ECM stops
sending current to the short circuited solenoid).
HINT:
Check the shift solenoid valve No. 1 when DTC P0753 is output and check the shift solenoid valve No. 2
when DTC P0758 is output.
DTC No.DTC Detecting ConditionTrouble Area
P0753
P0758
The ECM checks for an open or short circuit in the shift sole-
noid valves No. 1 and No. 2 circuit when it changes
The ECM records DTC P0753 or P0758 if condition a) or b) is
detected once, but it does not light up the MIL
After ECM detects condition a) or b) continuously 2 times or
more in one−trip, it causes the MIL light up until condition a) or
b) disappears
After that, if the ECM detects condition (a) or (b) once, it starts
lighting up the MIL again
(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 No. 1/No. 2 circuit
Shift solenoid valve No. 1/No. 2
ECM
DI40I−01

Q06970
Shift Solenoid
Valve No. 1Transaxle
Shift Solenoid
Valve No. 2
To Cruise Control ECUS2ECM
P−B 3
E1
E1
E4 E4
1
152
PB+ B+
S1
Q08088
S1
S2
DI−148
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Measure resistance between terminal S1 or S2 of ECM and body ground.
PREPARATION:
Disconnect the connector from the ECM.
CHECK:
Measure the resistance between terminal S1 or S2 of the ECM
and body ground.
OK:
Resistance: 11 − 15 Ω
OK Check and replace ECM.
NG

Q08587Q08344D04174
S2
S2S1
S1
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−149
1996 RAV4 (RM447U)
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 and connector between terminal S1 or S2
of the ECM and terminal S1 or S2 of the solenoid connector.
OK:
There is no open and no short circuit.
NG Repair or replace harness or connector.
OK

Q08588Q08589
D04175
DI−150
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
3 Check shift solenoid valve No. 1 or No. 2.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve No. 1 or No. 2.
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 solenoid makes on operating noise.
NG Replace shift solenoid valve No. 1 or No. 2.
OK
Repair or replace solenoid wire.

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