1999 TOYOTA CAMRY diagram

A09422
#10
#20
#30
#40
E01
E05 E6
E6
E6
E6
E6
E6 12
11
25
24
13
26#10+
#20+
#30+
#40+ E6
E6
E6
E62
1
15
14
BR
BR
J19
J/CA
A Injector
1 2
Injector
1 2
Injector
1 2
Injector
1 2L
B±W
BR
B±R No. 1
No. 2
No. 3
No. 4G
R
L
B±W
BR
ECEC
Voltage
Booster
Circuit
Voltage
Booster
Circuit
Voltage
Booster
Circuit
Voltage
Booster
Circuit
ECM
+B
± DIAGNOSTICSENGINE
DI±127
Injector Circuit
CIRCUIT DESCRIPTION
For the injection of fuel in the gaseous state, injectiors that allow the flow of a large volume of fuel and provide
improved sealing performance have been adopted.
These injectors are actuated by the voltage (150 V) that has been increased by the voltage booster circuit
provided in the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check wire harness, connector and vacuum hose in engine room.
CHECK:
(a) Check the connection conditions of the wire harness and connector.
(b) Check the disconnection, piping and break of the vacuum hose.
NG Repair or replace, then confirm that there is no
misfire (See the confirmation driving pattern).
OK
DI651±01

DI1J0±02
A00414
Vehicle Speed Sensor4±Pulse 4±Pulse
Combination Meter
ECM
Transaxle
Vehicle Speed Sensor
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±151
CIRCUIT INSPECTION
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4±pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular wave form by the wave form shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of these pluse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
During vehicle is being driven, no vehicle speed sensor signal
to ECM
(2 trip detection logic)
Combination meter

Open or short in vehicle speed sensor circuit

Vehicle speed sensor
ECM Clutch or brake slips or gear is broken
ECM

Automatic transaxle (clutch, brake or gear etc.)
WIRING DIAGRAM
See page DI±69.

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
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±157
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Measure resistance between terminal S1 or S2 of ECM and body ground.
PREPARATION:
Disconnect the connector from ECM.
CHECK:
Measure resistance between terminal S1 or S2 of ECM and
body ground.
OK:
Resistance: 11 ± 15 W
OK Check and replace the ECM.
NG

D02260
1 Shift Solenoid
Valve SLECM Transaxle
E1P8
E6SL
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±161
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±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

D06504
Combination
Meter
R
C10
2
L8
11
6 C10
C10R±B
13
O
Y16IF1
IF1L±W
YInstrument
Panel J/BECM
1H
1V10
5
19
18
17
6 E4
E4
E4
E7R2 L
B
+
NSW Y
L±W
R±B A
J23J27
J24 CC R±B Park/Neutral
Position Switch
P1
8 3 4
P1
P1Y5
6
5
P1L±W
R±BJ22
Junction
Connector
EEE
J22 Junction
ConnectorD
D D
R±B 3
IG3
B±W
B±W B±W
B±W Junction
Connector
B
BB
J22
Junction
Connector 11
IG2 P12
P16
N RB
P RL2L LL
GR J19
Junction
Connector
D
DR±L
R±L 2R±L
IG2
F
F
J24 Junction
ConnectorR±L
1
1
1K 1JGAUGE
B±Y 24
I10 Ignition Switch
I10
I10 I107
8
R43
1K
1J STARTER Instrument Panel J/B
Instrument Panel J/B W
W±R AM1
1B
2L12
55 1B
1K 1K
2A 41
AM2 W±R
Instrument Panel J/B Instrument Panel J/B
Engine Room J/B No.2 12 F14 F14
ALT
11F9 F11B±RB±R
B±G
FL
MAIN
BatteryB
J7 J8 Junction Connector
10
GRCB
IG2J7 J6GR B
ST Relay
2B3
115
9
2J2D
2K 53
12 Engine Room J/B No.2
J9 Junction ConnectorStarter
A
IF MAIN IG2 IG2 DI±166
± DIAGNOSTICSAUTOMATIC TRANSAXLE
WIRING DIAGRAM

Q05352
ECM
14 Cruise Control ECU
ODB+
OD1 20
C16E4Y±B
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±169
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±05

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