1999 TOYOTA CAMRY light

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

DI±164
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DTC P1520 Stop Light Switch Signal Malfunction
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 depressed, this switch sends a signal to ECM. Then the ECM cancels operation
of the lock±up clutch while braking is in progress.
DTC No.DTC Detecting ConditionTrouble Area
P1520No stop light switch signal to ECM during driving.
(2 trip detection logic)
Open or short in stop light switch circuit

Stop light switch

ECM
WIRING DIAGRAM
See page DI±108.
INSPECTION PROCEDURE
See page DI±108.
DI036±05

D06387
(+)NSW
(±)2R
L
Position
P, N
R
D
2
LNSW±Body
groundR±Body
ground2±Body
groundL±Body
ground
0 V
0 V0 V0 V
0 V
0 V
0 V 0 V
0 V
0 V 0 V
0 V
0 V 9 ± 14 V*
9 ± 14 V
9 ± 14 V
9 ± 14 V 9 ± 14 V*
9 ± 14 V
9 ± 14 V
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±167
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.
When using hand±held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect a hand±held tester to the DLC3.
(c) Turn the ignition switch to ON and hand±held tester main
switch ON.
CHECK:
Shift the shift lever into the P, R, N, 2 and L positions, and read
the PNP, REVERSE, 2ND and LOW signals on the hand±held
tester.
OK:
Shift positionSignal
22ND OFF " ON
LLOW OFF " ON
RREVERSE OFF " ON
P, NPNP OFF " ON
When not using hand±held tester:
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure voltage between terminals NSW, 2, L and R of ECM
and body ground when the shift lever is shifted in the following
positions.
OK:
HINT:
The voltage will drop slightly due to lighting up of the back up
light.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI±148).
NG

D05150
ECM
B+
OD2
(*) O/D Main
Switch Instrument
Panel J/BIgnition Switch
J5
Junction
Connector
B±RAM1
G±O
E47 IF1 11
G±O
G±O
O2 2
O2 4C
C
C
W±B
J4
Junction
Connector
W±B A
A
IE G±O IG1I104
I102
W
IK2
AM1
IB 1
B±R
F14 1
F14 2
ALT
F9 1
B±G
FL
MAINInstrument Panel
J/B
GAUGE
O/D OFF
Indicator Light
(Combination Meter)
FUSIBLE
LINK
BLOCK
O/D Main Switch
Contacts go open with switch pushed in
contacts go closed with switch pushed once again1K1
1D2
R±L
R±L
Battery J3
Junction
Connector
DDC127
C1012
*:
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±171
O/D Main Switch & O/D OFF Indictor Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed out.
In O/D main switch in OFF position, the O/D OFF indicator light lights up, and the ECM prohibits shifting over-
drive.
WIRING DIAGRAM
DI1J1±04

Q07595
2
4
DI±172
± DIAGNOSTICSAUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
O/D OFF indicator light does not light up
1 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
Check continuity at each terminal 2 and 4 of O/D main switch
connector.
OK:
O/D main switchSpecified condition
ONNo continuity
OFFContinuity
NG Replace the O/D main switch.
OK
2 Check and replace combination meter (See page BE±4).
NG Replace the combination meter.
OK

D05151BE3840D06388
ON
OD2
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±173
3 Check OVERDRIVE CUT SW2 signal.
When using hand±held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect hand±held tester to the DLC3.
(c) Turn the ignition switch to ON and hand±held tester main
switch ON.
CHECK:
Read the OVRDRIVE CUT SW2 signal on the hand±held tester.
OK:
O/D main switch conditionOVRDRIVE CUT SW2 signal
O/D ON (Pushed in)OFF
O/D OFF (Pushed once again)ON
When not using hand±held tester:
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Check voltage between terminal OD2 of ECM and body ground.
OK:
O/D main switch conditionVoltage
O/D ON (Pushed in)9 ± 14
O/D OFF (Pushed once again)Below 1.5 V
OK Check and replace the ECM (See page IN±29).
NG
4 Check harness and connector between O/D OFF indicator light and ECM (See
page IN±29).
NG Repair or replace the harness or connector.
OK
Check and replace the ECM (See page
IN±29).

Q07595
2
4
DI±174
± DIAGNOSTICSAUTOMATIC TRANSAXLE
O/D OFF indicator light remains ON
1 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
Check continuity at each terminal 2 and 4 of O/D main switch
connector.
OK:
O/D main switchSpecified condition
ONNo continuity
OFFContinuity
NG Replace the O/D main switch.
OK
2 Check harness and connector between O/D OFF indicator light and O/D main
switch, O/D OFF indicator light and ECM (See page IN±29).
NG Repair or replace the harness or connector.
OK
Check and replace the ECM (See page
IN±29).

DI03B±02
ABS Check Sheet
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration Year Registration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
ABS does not operate.
ABS Warning Light
AbnormalABS does not operate efficiently. DI±176
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
CUSTOMER PROBLEM ANALYSIS CHECK