cruise control TOYOTA CAMRY 1999 Service Repair Manual

B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.

I GROUND POINT
FAN MAIN RELAY
FAN MAIN RELAY
A/C FAN RELAY NO.2
A/C FAN RELAY NO.3
RADIATOR FAN MOTOR
RETRACT CONTROL
RELAY
RETRACT MOTOR RH
RETRACT MOTOR LH
FRONT TURN SIGNAL
LIGHT RH
PARKING LIGHT RH
FRONT TURN SIGNAL
LIGHT LH
PARKING LIGHT LH
DOOR LOCK CONTROL
SW RH
DOOR KEY LOCK
SW RH
DOOR LOCK MOTOR
RH
BLOWER RESISTOR
A/C AMPLIFIER
RADIO AND PLAYER
HEATER RELAY
AUTO ANTENNA
MOTOR
BLOWER SW
PARKING BRAKE SW
COMBINATION METER
HORN SW [COMB. SW]
TURN SIGNAL FLASHER
DOOR KEY LOCK SW LH
DOOR LOCK MOTOR LH
FUEL CONTROL SW
WOOFER AMPLIFIER
COMBINATION METER
COMBINATION METER
FUEL SENDER
CIGARETTE LIGHTER
O/D MAIN SW
CLOCK
5
5
5
5
4
4
4
4
4BA15
IB18
EA2 10
3E5
3E
6 3G
13 3F
3 3D
1 3B
7
ID115
IC33
IA12
E 3
A
A AW±B
W±BW±B W±B
W±B W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±BW±B W±B W±B W±B
W±B W±B
W±BW±B
W±B
W±B
W±B W±B
W±B
BR
W±B
BR BRW±BW±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B
W±B
BR W±B
BR BR
BR W±B W±BW±B
W±BW±BBR W±B (4A±GZE)
W±B A A A
I 6
I 6
I 2
I 2
I 2
B 5I 5
I 5
I 5
B 5
B 5
B 5
I 5
I 5
I 3I 3
E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6E 4
E 4
B 4
EAI 4
B 4
B 4
I 4I 8
IBIC
3C7
4
JUNCTION
CONNECTOR J 1
4
DOOR LOCK CONTROL
RELAY
ELECTRICAL IDLE-UP
CUT RELAY (M/T)FRONT SIDE MARKER
LIGHT RH
FRONT SIDE MARKER
LIGHT LH
BRAKE FLUID LEVEL
WARNING SW
UNLOCK WARNING
SW WIPER AND WASHER
SW [COMB. SW] LIGHT CONTROL SW
[COMB. SW] HEATER CONTROL
ASSEMBLY
HEATER SERVO
MOTOR AMPLIFIER
DIMMER SW
[COMB. SW]
CRUISE CONTROL
MIRROR SW
REAR WINDOW
DEFOGGER SW
POWER WINDOW
MASTER SW
POWER WINDOW
CONTROL RELAY
DOOR LOCK CONTROL
SW
REMOTE CONTROL
MIRROR SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

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.

G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Condenser Fan Motor
A 2 A/C Magnetic Clutch and Lock Sensor
A 3 A/C Triple Pressure SW
(A/C Dual and Single Pressure SW)
A 4 ABS Actuator
A 5 ABS Actuator
A 6 ABS Speed Sensor Front LH
A 7 ABS Speed Sensor Front RH
A 8 Air Fuel Ratio Sensor
A 9 Airbag Sensor Front LH
A 10 Airbag Sensor Front RH
B 1 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Crankshaft Position Sensor
C 3 Cruise Control Actuator
D 1 Data Link Connector 1
E 1 Electronically Controlled Transmission Solenoid
E 2 Electronically Controlled Transmission Solenoid
E 3 Engine Coolant Temp. SensorF 1 Front Turn Signal Light and Parking Light LH
F 2 Front Turn Signal Light and Parking Light RH
F 3 Front Wiper Motor
F 4 Fuel Pressure Sensor (Delivery Pipe)
F 5 Fuel Pressure Sensor (Fuel Pipe)
F 6 Fuel Shutoff Valve (Delivery Pipe)
F 7 Fuel Shutoff Valve (Fuel Pressure Regulator)
F 8 Fuel Temp. Sensor (Delivery Pipe)
F 9 Fusible Link Block
F 10 Fusible Link Block
F 11 Fusible Link Block
F 12 Fusible Link Block
F 13 Fusible Link Block
F 14 Fusible Link Block
G 1 Generator
G 2 Generator
H 1 Headlight LH
H 2 Headlight RH
H 3 Horn (High)
H 4 Horn (Low)

G ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
A 11 A/C Evaporator Temp. Sensor
A 12 A/C SW
A 13 ABS ECU
A 14 ABS ECU
A 15 Air Vent Mode Control Servo Motor
A 16 Airbag Squib (Front Passenger Airbag Assembly)
A 17 Airbag Squib (Steering Wheel Pad)
A 18 Ashtray Illumination
B 2 Blower Motor
B 3 Blower Resistor
B 4 Blower SW
C 4 Center Airbag Sensor Assembly
C 5 Center Airbag Sensor Assembly
C 6 Center Airbag Sensor Assembly
C 7 Cigarette Lighter
C 8 Cigarette Lighter Illumination
C 9 Clock
C 10 Combination Meter
C 11 Combination Meter
C 12 Combination Meter
C 13 Combination SW
C 14 Combination SW
C 15 Combination SW
C 16 Cruise Control ECUD 2 Data Link Connector 2
D 3 Data Link Connector 3
D 4 Diode (Courtesy)
D 5 Diode (Dome)
D 6 Diode (Idle±Up)
E 4 Engine Control Module
E 5 Engine Control Module
E 6 Engine Control Module
E 7 Engine Control Module
G 3 Glove Box Light and SW
H 5 Hazard SW
H 6 Heated Oxygen Sensor
H 7 Heater Control SW
I 9 Ignition Key Cylinder Light
I 10 Ignition SW
I 11 Integration Relay
I 12 Integration Relay

ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR
72K
NO. 2
LOCK±UPNO. 1
B E 1
ELECTRONICALLY CONTROLLED
TRANSMISSION SOLENOIDAB 20A
EFI FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
2J 8 3 15
2F 42J2
1 2
2 1
A 1B1B11 B4 B 9
C 6C7C8C16 A B
B B
EBEC B
A B3
A
B±YB±Y W±B W± B
BR
BR G±BLGY
BR L±B L±B
V
P
BR BREFI
RELAY
E 2
THROTTLE POSITION
SENSOR
ENGINE COOLANT TEMP. SENSORT 1
E 3 B
W
S2 S1 IG2 7 A 3A20
CRUISE CONTROL ECU C166 13 14
L±B L±R
Y±B
ECT IDL ODB ENGINE CONTROL MODULEB AC A 12
B±Y
B±R
JUNCTION
CONNECTOR J20JUNCTION
CONNECTOR J19
L±B5A
IGN
1W 7
1A 3B 1B
, E 4 , E 5 , E 6
J23
JUNCTION
CONNECTORB A, J24
A 65A
STARTER
1J 3
B±W B±W
JUNCTION
CONNECTOR J22
C 26
BR
B 2C 5
W±B
VC E2
VTA
+B BATT NSW VC VTA E2 THW
IDLO OD1 S2 S1 SL E05 E1
A 13
IG1 3
A A
JUNCTION
CONNECTOR J18 BRBR BR
2L 4
2A 1
B±G B
IGNITION SW
30A
AM2
BATTERY FL MAIN
3. 0WI10 7AM2 IG2
ST2
1B 51K 5
W± R W±R
C 1
A 1
F 9
FUSIBLE LINK
BLOCKC A, F11
A 22
B±R
6
W± B
2
B±R
+B1
E04I 4

CRUISE CONTROL
SPEEDOMETER
B 15 C6B14 C10 C 5
IH1 7IH12IF13IE25
IG4 5
CRUISE CONTROL
SW [COMB. SW]
CRUISE
CANCELSET/
COAST RESUME/
ACCEL
C14 CMS CCS
3 EP D 10A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1D 2
C 71J 1
B B D
1 DD
10 2 D
D
32DDBB3
10 11 12 5 4
10 4 11D
D
W±B
R±L
R±L
R±L R±L
R±L
B±R
W W± L V±W LG±RO O
LG±R
LG±R
V±WO V±WBRPL L
P
V±W
O
R±LR±L JUNCTION
CONNECTOR J19
D POSITION SW
[PARK/NEUTRAL POSITION SW] P 1 JUNCTION
CONNECTOR J 3
VEHICLE SPEED SENSOR
(
COMBINATION METER) V 1
DATA LINK
CONNECTOR 2 D 2
DATA LINK
CONNECTOR 1 D 1
JUNCTION CONNECTOR J 1
JUNCTION CONNECTOR J 2
JUNCTION CONNECTOR J15
R±L
CRUISE CONTROL ECU C16 COMBINATION METER
BR
CRUISE
A/D TC TCB
SI SE
IG+IG2 2
IG3 11 C C11 B , C12IG2 9
B±R LG±R
FF
A A
JUNCTION
CONNECTOR J22
B±R
PI TC SPD CMS CCS JUNCTION
CONNECTOR J2 4

15A
ECU±IG
1J 9
C 6 A 20 A 315A
STOP FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1C 7
A AAAAA B A
IF1R 5
1R 4 16 15 8 2
41
4 B
C
12332
ABB
C
W± BGND IDLO OD1 S2
7 13 14 6 9
L±B L±B Y±BL±R
L±B
B±RL±B
B±R
W W± B
R±G
R±B
G±B R±Y W±B
G± W
W
W±B JUNCTION
CONNECTOR J19
JUNCTION
CONNECTOR J12
STOP LIGHT SW S 4
ENGINE CONTROL MODULE
JUNCTION
CONNECTOR
CRUISE CONTROL ACTUATOR C 3
G± W G± W
CRUISE CONTROL ECU
C16
1J 8
1J 7
W±B W±B
M
JUNCTION CONNECTOR J 9
IG2 7S2
B J 6 A , J 7 E 4 CA, E 6
1
IDL OD ECT B
MO MC L STP±
A A
JUNCTION
CONNECTOR J23 ELECTRONICALLY
CONTROLLED
TRANSMISSION
SOLENOID E 2

CRUISE CONTROL
The cruise control system is a constant vehicle speed controller which controls the opening angle of the engine throttle valve
by the SW, and allows driving at a constant speed without depressing the accelerator pedal.
SET CONTROL
When the SET/COAST SW is operated while traveling with the CRUISE SW on, the speed when the SET/COAST SW is
operated to off is memorized, and the vehicle speed is controlled at that speed.
COAST CONTROL
When the SET/COAST SW is operated to on, the motor in the actuator rotates the throttle valve until it is closed fully to
decrease the vehicle speed, and the speed when the SET/COAST SW is operated to off is memorized, and the vehicle
speed is controlled at that speed.
Furthermore, every time the SET/COAST SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehicle
speed is decreased by approx. 1.5 km/h (0.9 mph).
ACCEL CONTROL
When the RESUME/ACCEL SW is operated to on, the motor in the actuator rotates the throttle valve to open direction to
increase the vehicle speed, and the speed when the RESUME/ACCEL SW is operated to off is memorized, and the vehicle
speed is controlled at that speed.
Furthermore, every time the RESUME/ACCEL SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehicle
speed is increased by approx. 1.5 km/h (0.9 mph).
MANUAL CANCEL MECHANISM
While traveling with the cruise control, if the following signal is input, the magnetic clutch of the actuator is cut, the motor is
controlled to close the throttle valve, and the cruise control is canceled.
(1) Stop lamp SW is on (Brake pedal is depressed)
(2) The CANCEL SW of the control SW is on
(3) CRUISE SW is off
RESUME CONTROL
After canceling the cruise control by the Manual Cancel operation, (Except when the CRUISE SW is off) if the vehicle speed
is above the minimum speed limit (Approx. 40km/h, 25mph), operating the RESUME/ACCEL SW to on from off will cause the
system to accelerate and resume to the vehicle speed before manual cancellation.
OVERDRIVE FUNCTION
The overdrive may be cut on an uphill grade, while traveling with the cruise control.
After the overdrive is cut, if the vehicle speed reaches the overdrive resume speed (Set speed minus 2 km/h (1.2 mph) ), and
if the system determines that the uphill grade has finished, the overdrive will resume after the overdrive timer operation.
AUTO CANCEL OPERATION
If any of the following conditions are detected, the set speed is erased and the control is canceled.
(1) Overcurrent to the magnetic clutch traction transistor
(2) The motor does not operate
(3) Short in the magnetic clutch
(4) Disconnection in the magnetic clutch (Includes blown stop lamp fuse)
(5) No vehicle speed signal input
(6) Ground short of the control SW input
(7) The actual vehicle speed becomes slower than the minimum speed limit
SYSTEM OUTLINE

C3 CRUISE CONTROL ACTUATOR
3±4 : Approx. 38.5 W
C14 CRUISE CONTROL SW [COMB. SW]
5±3 : Continuity with the CRUISE SW on
4±3 : Approx. 418 W with the CANCEL SW on
Approx. 68 W with the RESUME/ACCEL SW on
Approx. 198 W with the SET/COAST SW on
C16 CRUISE CONTROL ECU
9±GROUND : Approx. 12 volts with the ignition SW at ON or ST position
10±GROUND : Approx. 418 W with the CANCEL SW on in the cruise control SW
Approx. 198 W with the SET/COAST SW on in the cruise control SW
Approx. 68 W with the RESUME/ACCEL SW on in the cruise control SW
16±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C328E6C30J1931
C11B30J131J2231
C12C30J231J2331
C1430J331J2431
C1630J6A31P129
D128J7B31S431
D230J931V129
E228J1231
E4A30J1531
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1C22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1R22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE236Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
IF136Instrument Panel Wire and Cowl Wire (Under the Blower Motor)
IG238Engine Wire and Cowl Wire (Under the Blower Motor)IG338Engine Wire and Cowl Wire (Under the Blower Motor)
IH138Engine Wire and Instrument Panel Wire (Under the Blower Motor)
: GROUND POINTS
CodeSee PageGround Points Location
IF36Instrument Panel Brace LH
IG36Instrument Panel Brace RH
SERVICE HINTS

COMBINATION METER
10A
GAUGEFROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1D 27. 5A
DOME
2J 12
1J 1
IH1 4IH17IH12IH13IH16 IF1 6IF1 10 C 7B 14 B11
B 6B3C5C8B15 C6B10 A2A1C2
FUEL
TACHOMETER
SPEEDOMETER
WATER TEMP.
IG2 2IF13
IG1 JUNCTION
CONNECTOR J 3JUNCTION
CONNECTOR J15
WATER
TEMP.
SENDER W 3 JUNCTION
CONNECTOR J19
FROM ENGI NE
CONTROL MODULE
TO DOOR
COURTESY SW
TO ENGI NE
CONTROL MODULETO ENGINE
CONTROL MODULE
TO CRUISE
CONTROL ECU R±L
R±L R±L
V±W
V±W V±W R±L R±L
G± WY±R
G±W
BR
B±O
L
P
R±W
BR
Y±G
G± R BR
B±O
L
P R±L
BR BR
Y±G
G± R
V±W DB
32B
DB
1
FUEL
DOOR
MALFUNCTION
INDICATOR LAMPTRIP METER
ODOMETER
DD C10
COMBINATION METERB A, C11 C, C12 F F
JUNCTION
CONNECTOR J24
R±LE E2 11W1
1G8
R R±Y
R R
JUNCTION
CONNECTOR J16 DIODE
(
DOME) D 5
IF1 9
IG1 5
82
Y±R Y±R
ENGINE CONTROL
MODULE E 7
R±LSI SE
IG+
EC
VEHICLE SPEED SENSOR
(
COMBINATION METER) V 1
FUELW FUEL