1999 TOYOTA CAMRY Service Repair Manual

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Page 2305 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±153
3 Check the ECM (See page IN±29).
NG Replace the ECM.
OK
Check and repair the transaxle (clutch, brake
or gear etc.).

Page 2306 of 4592

TOYOTA CAMRY 1999 Service Repair Manual Q07741
DI±154
± DIAGNOSTICSAUTOMATIC TRANSAXLE
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

Page 2307 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±155
2 Check the valve body (See page DI±148).
NG Repair or replace the valve body.
OK
Repair or replace the transaxle.

Page 2308 of 4592

TOYOTA CAMRY 1999 Service Repair Manual Position
NORMALSHIFT SOLENOID NO.1
MALFUNCTIONING
Solenoid valveNo.1 No.2GearSHIFT SOLENOID NO.2
MALFUNCTIONINGBOTH SOLENOIDS MAL-
FUNCTIONINGSolenoid valve
No.1 No.2GearSolenoid valve
No.1 No.2GearGe

Position
NORMALSHIFT SOLENOID NO.1
MALFUNCTIONING
Solenoid valveNo.1 No.2GearSHIFT SOLENOID NO.2
MALFUNCTIONINGBOTH SOLENOIDS MAL-
FUNCTIONINGSolenoid valve
No.1 No.2GearSolenoid valve
No.1 No.2GearGear when shift selector is
manually operated
D
2
LON
ONOFF
ON
ON OFF
OFF OFF
ON
ONOFF
ON
ON OFF
ON
ON ONOFF1st
2nd
3rd
O/D
1st
2nd
3rd
1st
2ndX
X
X
X
X
X
X
X
XON
ON
OFF
OFFON
ON
ON3rd 3rd
O/D
3rd
3rd
1st
2ndX
X
X
X
X
X
X
X
X ON
ON OFF OFF
OFF
ON
ON1st
1st O/D O/D
3rd
1st
1stO/D O/D O/D
O/D
3rd 3rd
3rd
1st
1st
X: MalfunctionsON
ON3rd
3rdO/D
3rd
OFF OFF
DI±156
± DIAGNOSTICSAUTOMATIC TRANSAXLE
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 performed 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 con-
trols the remaining normal shift solenoid valve to allow the vehicle to be operated smoothly (Fail safe func-
tion).
Fail Safe Function:
If either of the shift solenoid valve circuits develops an open or 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 performed
electronically and 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).
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 gear posi-
tion.
The ECM records DTC P0753 or P0758 if condition (a) or (b) is
detected once, but it does not light up MIL.
After 1 sec. ECM detects condition (a) or (b) in a trip again, it
causes the MIL to light up.
(a) When the solenoid is energized, the solenoid resistance is
8 W or less and is counted.
(b) When the solenoid is not energized, the solenoid resistance
is 100 kW or more and is counted.
Open or short in shift solenoid valve No.1/No.2 circuit
Shift solenoid valve No.1/No.2
ECM
DI033±05

Page 2309 of 4592

TOYOTA CAMRY 1999 Service Repair Manual D01841
3
V
S1B+
L±B Shift Solenoid
Valve No. 1ECM Transaxle
Shift Solenoid
Valve No. 2E2
1
E27
E6
6
E6S2B+
L±BJunction
Connector
from Cruise
Control ECUB
19 B
19
19
B
D05157
S2 S1
± DIAGNOSTICSAUT

Page 2310 of 4592

TOYOTA CAMRY 1999 Service Repair Manual D05156
S2
S1
S2
S1
Q07744
DI±158
± DIAGNOSTICSAUTOMATIC TRANSAXLE
2 Check harness and connector between ECM and automatic transaxle solenoid
connector.
PREPARATION:
Disconnect the solenoid connecto

Page 2311 of 4592

TOYOTA CAMRY 1999 Service Repair Manual Q07745
Drain
Drain Line
Pressure
Q07746
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±159
DTC P0770 Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the

Page 2312 of 4592

TOYOTA CAMRY 1999 Service Repair Manual DI±160
± DIAGNOSTICSAUTOMATIC TRANSAXLE
2 Check valve body (See page DI±148).
NG Repair or replace the valve body.
OK
3 Check the torque converter clutch (See Pub. No. RM654U on page AX±26).
NG Re

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