TOYOTA CAMRY 1999 Service Repair Manual

D01808
1
E3P
*1
Transaxle
Shift Solenoid
Valve SLECM
B+
: w/ Engine Immobiliser System
: w/o Engine Immobiliser SystemSL
E91 20
*1
*2
E9
*2
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±419
654 Author: Date:
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 W or less short circuit when sole-
noid is energized.
(b) Solenoid resistance is 100 kW 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
DI035±02

Q07747 Q10099D00992
w/ Engine Immobiliser System
w/o Engine Immobiliser System
SL SL
DI±420
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
655 Author: Date:
INSPECTION PROCEDURE
1 Measure resistance between terminal SL of ECM and body ground.
PREPARATION:
Disconnect the connector from ECM.
CHECK:
Measure resistance between terminal SL of ECM and body
ground.
OK:
Resistance: 11 ~ 15 W
OK Check and replace the ECM.
NG

Q07748 D00937D00993
w/ Engine Immobiliser System
w/o Engine Immobiliser System
SL SL
SLSL12
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±421
656 Author: Date:
2 Check harness and connector between ECM and automatic transaxle solenoid
connector.
PREPARATION:
Disconnect the solenoid connector from the transaxle.
CHECK:
Check the harness and connector between terminal SL of ECM
and terminal SL of solenoid connector.
OK:
There is no open or short circuit.
NG Repair or replace the harness or connector.
OK

Q07749
DI±422
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
657 Author: Date:
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:
(a) Measure resistance between terminal SL of shift solenoid
valve and solenoid body.
(b) Connect positive
lead to terminal of solenoid connec-
tor, negative  lead to solenoid body.
OK:
(a) Resistance: 11 ~ 15 W
(b) The shift solenoid valve SL makes operation
noise.
NG Replace the shift solenoid valve SL.
OK
Check and replace or repair the solenoid
wire.

± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±423
658 Author: Date:
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±170.
INSPECTION PROCEDURE
See page DI±170.
DI036±02

DI±424
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
659 Author: Date:
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 D position.
DTC No.DTC Detection ConditionTrouble Area
P1780
When driving under conditions (a) and (b) for 30 seconds 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: 2,000 ~ 5,000 rpm

Short in park/neutral position switch circuit

Park/neutral position switch

ECM
DI037±02

D01820
Combination
Meter
R
C8R ± B
13
IG13
2
L8
11
6 C8
C8O
Y16
IG13
*3 L ± W
*4 O
1HInstrument
Panel J/BECM
1V Park/Neutral
Position Switch
P1
L ± W
B ± WII2
E
8 34
P1
P1 P12Y
R ± BII2
J29
Junction
Connector E
E
Y10
5
Y19
15
*1
*2
E7
E7
E7
E7
E7
E7R2 L
1816
*1
*2
17
22B
+
NSW *3 L ± W
*4 O
R ± B
R ± B
B ± W
DD
D
J29
Junction
Connector
J27J27
J28 CC
A
R ± B
B ± W 5
6
3
11II3
II2
B
BB R ± L A
A
J21
Junction
Connector
J28
Junction
Connector
5 2II2R ± L
F
F6
B ± R
F9
ALT
B ± G
B ± R
1
112F9
F4F6
FL
MAIN
BatteryAM1
1B
2L12
55 1B
1K1K
2A 41
AM2 W ± R
B GR
II2
W ± R
10*5
*6GR
B ± O
C
J8B*5
*6GR
B ± O
BW2
74
8 I16 I16
I16 I16Ignition Switch
B ± Y
R11
43 1K
1K1J
1J GAUGE
STARTER
MAINST Relay
2BB ± W
3
115
9
2J2D
2K 5
3
12 Y
J29
Junction
Connector
J27, J28
Junction Connector
*3 L ± W
*4 O
Instrument Panel J/B
Instrument Panel J/B Instrument Panel J/B
Engine Room J/B No.2
J11 Junction Connector
*1: w/ Engine Immobiliser System
*2: w/o Engine Immobiliser System
*3: TMC Made*4: TMMK Made
*5: TMC Made w/o Traction Control
*6: Except TMC Made w/o Traction ControlInstrument Panel J/B
Starter
J7A
IK R ± L
J7 J8 Junction Connector Engine Room J/B No.2 R ± L
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±425
660 Author: Date:
WIRING DIAGRAM

D00043 Q08479BE3840D00994
w/ Engine Immobiliser System
w/o Engine Immobiliser SystemON
NSW
LL
2
R
NSWR
2
(±)(+) (+)
(±)
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 V9 ~ 14 V
9 ~ 14 V 9 ~ 14 V*
DI±426
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
661 Author: Date:
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.
When using TOYOTA hand±held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect a TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand±held tes-
ter 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 TOYOTA
hand±held tester.
OK:
Shift positionSignal
22ND OFF " ON
LLOW OFF " ON
RREVERSE OFF " ON
P, NPNP OFF " ON
When not using TOYOTA hand±held tester:
PREPARATION:
Turn the ignition switch 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±405).
NG

Q07657
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±427
662 Author: Date:
2 Check park/neutral position switch.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the park/neutral position switch.
CHECK:
Check continuity between each terminal shown below when the
shift lever is moved to each position.
Shift PositionTerminal No. to continuityTerminal No. to continuity
P4 ± 75 ± 6
R4 ± 8±
N4 ± 105 ± 6
D4 ± 9±
22 ± 4±
L2 ± 3±
OK:
There is continuity.
NG Replace the park/neutral position switch.
OK
3 Check harness and connector between battery and park/neutral position switch,
park/neutral position switch and ECM (See page IN±31).
NG Repair or replace the harness and connector.
OK
Check and replace the ECM.

D01809
Cruise Control ECU
: w/ Engine Immobiliser System
: w/o Engine Immobiliser SystemOD14
C15Y ± B
*1
20
E7OD1B+ ECM
*2
18
E7
*1
*2
DI±428
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
663 Author: Date:
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving uphill with cruise control activated, in order to minimize gear shifting and provide smooth cruis-
ing overdrive may be prohibited temporarily under some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels overdrive
shifting until these signals are discontinued.
WIRING DIAGRAM
DI038±02