fuse diagram TOYOTA CAMRY 1999 Service User Guide

I00281
Cruise Control ECU
C15
G±B
2 1 34W±B
3
STOP Fuse8 Stop Light Switch
4
R±Y
Stop Lights Cruise Control Actuator

Actuator Magnetic Clutch
J7
J7AAJ/C
W±B
1J
1J
W±B
A
J/C
IG 8
7
J11Instrument
Panel J/BL
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±883
111 8 Author: Date:
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph), cruise control at the
set speed is resumed.
DTC No.Detection ItemTrouble Area
12Short in actuator magnetic clutch circuit.
Open (0.8 sec.) in actuator magnetic clutch circuit.
STOP Fuse
Stop light switch
Actuator magnetic clutch
Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground
Cruise control ECU
WIRING DIAGRAM
DI08N±12

I00292
Vehicle Speed Sensor
ECUCombination Meter
Cruise Control ECU
4 pulses/
1 rotation
of rotor shaft4 pulses/
1 rotation
of rotor shaft
I00282
Cruise Control ECU
12
SPDV±W V±WB
BJ15
J/CIG3
3
V±W14
Combination Meter
15
6
Speedo
±meter
P L
IJ12IJ17
P
3L
2
SI
SE
IG+
1
R±Lto GAUGE Fuse
C15
C9 C9
C10
Speed
Sensor DI±888
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1123 Author: Date:
DTC 21 Open in Vehicle Speed Sensor Circuit
CIRCUIT DESCRIPTION
The signal from the vehicle speed sensor circuit is sent to cruise control ECU as vehicle speed signal.
The rotor shaft is driven by the gear of the transmission.
For each rotation of the shaft, the vehicle speed sensor sends a 4±pulse signal through the combination
meter to the cruise control ECU (See the following installation).
This signal is converted inside the combination meter and sent as a 4±pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
DTC No.Detection ItemTrouble Area
21Speed signal is not input to the cruise control ECU while cruise
control is set.

Combination meter

Harness or connector between cruise control ECU and com-
bination meter, combination meter and vehicle speed sensor

Vehicle speed sensor

Cruise control ECU
WIRING DIAGRAM
DI08P±12

I00285
Cruise Control ECU
2
STP±
8
L
J27
J/C
G±W A A
G±W 5
1R
1R
G±W 1
4 Stop Light Switch
2
3
W
7
1C4
1BG±B 4
B±R
FL BLOCK
F91 1
F4
B±G
FL MAIN
BatteryR±Y
Cruise Control
Actuator
3
4 J/C
A
J7 A
J7
W±B
1J
1JJ/C
AJ11
W±B
IG Instrument Panel J/B
STOP
ALT
C15
C15
Instrument Panel J/B
Instrument Panel J/BW±B
87 DI±898
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1133 Author: Date:
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to the ECU. When the ECU receives
this signal, it cancels the cruise control.
A fail±safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
The cancel conditions are: Battery positive voltage at terminal STP±
When the brake is ON, battery positive voltage normally is applied through the STOP fuse and stop light
switch to terminal STP± of the ECU, and the ECU turns the cruise control OFF.
If the harness connected to terminal STP± has an open circuit, terminal STP± will have battery positive volt-
age and the cruise control will be turned OFF.
Also, when the brake is ON, the magnetic clutch circuit is cut mechanically by the stop light switch, turning
the cruise control OFF. (See page DI±883 for operation of the magnetic clutch)
WIRING DIAGRAM
DI08T±11

F00073
ECU±IGECU±IG
Instrument
Panel J/BECU±IG
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±205
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove ECU±IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short circuit in all the harness and
components connected to ECU±IG fuse (See at-
tached wiring diagram).
OK
2 Check battery positive voltage.
OK:
Voltage: 10 ± 14 V
NG Check and repair the charging system (See Pub.
No. RM654U on page CH±1).
OK

I00281
Cruise Control ECU
C16
G±B
2 1 34W±B
3
STOP Fuse8 Stop Light Switch
4
R±Y
Stop Lights Cruise Control Actuator

Actuator Magnetic Clutch
J6
J6AAJ/C
W±B
1J
1J
W±B
A
J/C
IF 8
7
J9Instrument
Panel J/BL
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±331
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph), cruise control at the
set speed is resumed.
DTC No.DTC Detecting ConditionTrouble Area
12Short in actuator magnetic clutch circuit.
Open (0.8 sec.) in actuator magnetic clutch circuit.
STOP Fuse
Stop light switch
Actuator magnetic clutch
Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground
Cruise control ECU
WIRING DIAGRAM
DI08N±13

I00292
Vehicle Speed Sensor
ECUCombination Meter
Cruise Control ECU
4 pulses/
1 rotation
of rotor shaft4 pulses/
1 rotation
of rotor shaft
I00282
Cruise Control ECU
12
SPDV±W V±WB
BJ15
J/CIF1
3
V±W14
Combination Meter
15
6
Speedo
±meter
P L
IH12IH17
P
3L
2
SI
SE
IG+
1
R±Lto GAUGE Fuse
C16
C11 C11
C12
Speed
Sensor DI±336
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DTC 21 Open in Vehicle Speed Sensor Circuit
CIRCUIT DESCRIPTION
The signal from the vehicle speed sensor circuit is sent to cruise control ECU as vehicle speed signal.
The rotor shaft is driven by the gear of the transmission.
For each rotation of the shaft, the vehicle speed sensor sends a 4±pulse signal through the combination
meter to the cruise control ECU (See the following installation).
This signal is converted inside the combination meter and sent as a 4±pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
DTC No.DTC Detecting ConditionTrouble Area
21Speed signal is not input to the cruise control ECU while cruise
control is set.

Combination meter

Harness or connector between cruise control ECU and com-
bination meter, combination meter and vehicle speed sensor

Vehicle speed sensor

Cruise control ECU
WIRING DIAGRAM
DI08P±13

I08461
A
J6A
J6 J/C
J/CJ9
A
W±BW±B
Instrument Panel J/B
7
1J
1J8
IF Battery FL MAIN B±G1
F9FL BLOCK
ALT
F141B±R 7
1C4
1B Instrument Panel J/B
STOP W2
3Stop Light Switch
1
4G±W1R4 Instrument Panel J/B
5
1R
R±Y
G±B
W±BCruise Control
Actuator
3
4G±WAA J23
J/C
G±W2
C16
C16
8Cruise Control ECU
STP±
L
DI±346
± DIAGNOSTICSCRUISE CONTROL SYSTEM
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to the ECU. When the ECU receives
this signal, it cancels the cruise control.
A fail±safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
The cancel conditions are: Battery positive voltage at terminal STP±
When the brake is ON, battery positive voltage normally is applied through the STOP fuse and stop light
switch to terminal STP± of the ECU, and the ECU turns the cruise control OFF.
If the harness connected to terminal STP± has an open circuit, terminal STP± will have battery positive volt-
age and the cruise control will be turned OFF.
Also, when the brake is ON, the magnetic clutch circuit is cut mechanically by the stop light switch, turning
the cruise control OFF. (See page DI±331 for operation of the magnetic clutch)
WIRING DIAGRAM
DI08T±12

B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
Theft Deterrent and Door Lock Control
J POWER SOURCE (Current Flow Chart)
11
1
EA1 1EA2 3
7
EB16
E 6
E 7I 2I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
W W
B B B B BW±B
B
B
B B±O
B±W
W±B
B±W STARTER RELAY INJECTION RELAY15A HAZ±RADIO7.5A AM250A MAIN 1.25B FL MAIN
BATTERY
WWW
W W W
R W±L
W
W
G±W
G
15A TAIL
20A DEFOG
15A RAD CIGTA I L
RELAY 7.5A DOME 40A DOOR LOCK CB
2 1
1 2
4 8
2 3
3 4
G
W±R
P±L B±Y
B±Y
W±R
AM2 IG2
ACC
IG1AM1W W
W±R
W W
W±B
21
1
1
1
1
2
2
2
2
3
4
3
4 1
2
1
22
1
11
1
IGNITION SW I 8
Battery
30A AM2
2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning STOP
Fuse Page
194
214
11 2
System
DOME 20A
10ACombination Meter
Headlight
Interior Light
2
2
6 100A ALT
EB1
POWER SOURCE
Light Auto Turn Off187
180
166
210
230
122
10A ECU±B
5 60A ABS
2
6 Fusible Link Block2
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

M OVERALL ELECTRICAL WIRING DIAGRAM
9
101112
2 CAMRY CNG (
Cont' d)
ECIntake
manif oldB±YBR BR W± B
BR BR BR
STP 4A
LOCK IN 18 C
PRS 10 D
B±OW± L
MG C 21 AL±Y
A/CS 10 AR±B
LOCK 15 AR± W
NSW 6AB±W
STA 11 AGR
IGT1 20 CB
IGF 3CW±R
IGT2 19 CY±RBR
10 IG3
W± L Fr om Ignit ion Coil
and Igniter
No. 1, No. 2< 1±3>
BRTE1 15 B
NE
1 2
C 2
CRANKSHAFT
POSITION SENSOR
1 2C 1
CA MSHAF T
POSITION SENSORNE ± GE03 E0 2 E01 SPD
E04
Intake
ma n i f o l dECL
B±RBRL B±W
(
Shielded) (
Shielded)BRBR
BR A
AA
A
A J20
JUNCTION
CONNE CTOR
BR BR BR BR
TE1 E1+BL±W
To Tac hometer
[Comb. Met er]
< 17±5>To A/ C Magnetic
Clutch and Loc k
Sens or< 19±4> Fr om A/C Dual
Pressure SW< 19±4>Fr om MG CL T
Relay< 19±2>Fro m A/C SW
< 19±4> Fro m A/C SW
< 19±4> From º STARTERº
Fuse< 1±2>Fr om Park/ Neutral
Posit ion SW< 1±2>12
8 D 1
DA TA LI NK
CONNECTOR 1
3
E1
BR
ENGI NE CONT ROL MODULE
IG3 6
E ngine Control
BR
BR
BR
G L
A 8
AI R FUEL
RA TI O SE NS ORHTA F 2A
AF± 14 B
AF+ 6B 14 23
B±W (
Shielded)
HT AF±+B AF+ A
B
D
EB B±Y
C 16 A 13 C 5 C 17 C 4
BRA16 B 22 C 13 C
JUNCTION
CONNECTORJ23
TACH
A
, E 5 E 4 A B , E 6 C , E 7 D
BRBR CW± B1IG1G G
7IG1
G
9A 8A FA
FA
B±O From Stop Light SW
< 8±4>
V±W Fr om Speedomet er
[Comb. Meter]
< 17±8>G±W
2 1 12 C 2C
I 4
INJECTOR NO. 1
L B±W
(
Shielded)
2 1 11 C 1C
I 5
INJECTOR NO. 2
BR B±R
(
Shielded)
2 1 25 C 15 C
I 6
INJECTOR NO. 3
GR
(
Shielded)
2 1 24 C 14 C
I 7
INJECTOR NO. 4
WO
(
Shielded)
4IG1
IHCowl side
panel RH A AAA
A
W± B W± B
J21
J UNCTI ON CONNECTOR3IG1
BR
26 C
A A
J18
JUNCT I ON
CONNECTOR
BRBR BR
W±B BR
BREO5 #40 #40+ #30 #30+ # 10+ # 10 # 20+ # 20

B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
Theft Deterrent and Door Lock Control
K POWER SOURCE (Current Flow Chart)
11
1
EA1 1EA2 3
7
EB16
E 6
E 7I 2I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
W W
B B B B BW±B
B
B
B B±O
B±W
W±B
B±W STARTER RELAY INJECTION RELAY15A HAZ±RADIO7.5A AM250A MAIN 1.25B FL MAIN
BATTERY
WWW
W W W
R W±L
W
W
G±W
G
15A TAIL
20A DEFOG
15A RAD CIGTA I L
RELAY 7.5A DOME 40A DOOR LOCK CB
2 1
1 2
4 8
2 3
3 4
G
W±R
P±L B±Y
B±Y
W±R
AM2 IG2
ACC
IG1AM1W W
W±R
W W
W±B
21
1
1
1
1
2
2
2
2
3
4
3
4 1
2
1
22
1
11
1
IGNITION SW I 8
Battery
30A AM2
2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning STOP
Fuse Page
194
214
11 2
System
DOME 20A
10ACombination Meter
Headlight
Interior Light
2
2
6 100A ALT
EB1
POWER SOURCE
Light Auto Turn Off187
180
166
210
230
122
10A ECU±B
5 60A ABS
2
6 Fusible Link Block2
* The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.