1999 TOYOTA CAMRY brake

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

I00157
Instrument panel junction block No.1:
STOP Fuse
I00133
21
43
DI±332
± DIAGNOSTICSCRUISE CONTROL SYSTEM
INSPECTION PROCEDURE
1 Check STOP fuse.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Remove the STOP fuse from instrument panel junction
block No.1.
CHECK:
Check fuse continuity.
OK:
There is continuity.
NG Replace STOP fuse.
OK
2 Check stop light switch.
PREPARATION:
Disconnect the stop light switch connector.
CHECK:
Check continuity between terminals.
Switch positionContinuity
Switch pin free
(Brake pedal depressed)1 ± 2
Switch pin pushed in
(Brake pedal released)3 ± 4
NG Replace stop light switch.
OK

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

Input SignalIndicator Light
Blinking Pattern
Stop Light
switch ON
LightOFF
ONSW OFF
SW ON
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±347
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light comes ON when brake pedal is depressed, and turns OFF when brake pedal is re-
leased.
NG Check stop light system (See page BE±1).
OK
2 Input signal check.
CHECK:
(a) See input signal check on DI±319.
(b) Check the indicator light when the brake pedal is de-
pressed.
OK:
The indicator light goes OFF when the brake pedal is
depressed.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±328).
NG

AB0119
I00142
I00173
ON
STP±
(±) (+)
DI±348
± DIAGNOSTICSCRUISE CONTROL SYSTEM
3 Check voltage between terminal STP± of cruise control ECU connector and
body ground.
PREPARATION:
(a) Remove the ECU with connectors still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal STP± of cruise control ECU
connector and body ground, when the brake pedal is de-
pressed and released.
OK:
Depressed10 ± 14 V
ReleasedBelow 1 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±328).
NG
4 Check for open in harness and connectors between terminal STP± of cruise con-
trol ECU and stop light switch (See page IN±29).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±29).

EM±2
± ENGINE MECHANICAL (5S±FE)CO/HC
1174 Author: Date:
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
(1) Check oxygen sensor operation.
(See page DI±66)
(2) See the table below for possible causes, then in-
spect and correct the applicable causes if neces-
sary.
COHCSymptomCauses
NormalHighRough idle1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs

Open or crossed hi
gh±tension cords
Oen or crossed high±tension cords
2. Incorrect valve clearance
3. Leaky EGR valve
4. Leaky intake and exhaust valves
5. Leaky cylinder
LowHighRough idle
(Fluctuating HC reading)1. Vacuum leaks:

PCV hose

EGR valve

Intake manifold

Throttle body

IAC valve

Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)1. Restricted air filter
2. Faulty SFI system

Faulty pressure regulator

Defective ECT sensor

Defective IAT sensor

Faulty ECM

Faulty injector

Faulty throttle position sensor

MAP sensor

A07358
Ground Wire
MAP Sensor
Vacuum Hose
Brake Booster
Vacuum Hose
Intake
Manifold
Air Hose for Air Assist System (California)
Intake Manifold
Stay
Injector
(Except California)
Knock Sensor 1
ConnectorPCV HoseVSV Connector
for EGR
VSV for EGREGR Valve and Vacuum
Modulator
Fuel Inlet Hose
Fuel Pulsation Damper
 O±Ring
Injector
(California)Injector
Connector Spacer
Insulator
N´m (kgf´cm, ft´lbf)
 Non±reusable part
 Gasket
 Insulator Grommet
 O±Ring  Gasket Gasket
* For use with SST
19 (195, 14)
34 (350, 25)* 29 (300, 21)
: Specified torque
x 6
Engine Wire
13 (130, 9)
Spacer
± ENGINE MECHANICAL (5S±FE)CYLINDER HEAD
EM±31
1203 Author: Date:

A07363
A07365
S05981
SST
S05990
(a)
(b)(c)
A07360
(e)(d)
± ENGINE MECHANICAL (5S±FE)CYLINDER HEAD
EM±35
1207 Author: Date:
(d) Loosen the union nut of the EGR pipe, and remove the
bolt, 2 nuts, the EGR valve, vacuum modulator, vacuum
hoses assembly and gasket.
12. DISCONNECT ENGINE WIRE FROM INTAKE MAN-
IFOLD
(a) Disconnect the engine wire clamp from the bracket on the
LH side of the intake manifold.
(b) Disconnect the 2 engine wire clamps from the 2 brackets
on the front side of the intake manifold.
13. DISCONNECT FUEL INLET HOSE FROM DELIVERY
PIPE
(a) Using SST, loosen the fuel pulsation damper.
SST 09612±24014 (09617±24011)
(b) Remove the fuel pulsation damper and 2 gaskets, and
disconnect the fuel inlet hose from the delivery pipe.
14. REMOVE INTAKE MANIFOLD
(a) Disconnect the MAP sensor vacuum hose from the gas
filter.
(b) Disconnect the brake booster vacuum hose from the in-
take manifold.
(c) Disconnect the PCV hose from the intake manifold.
(d) Remove the 2 bolts, and disconnect the 2 ground wires
from the intake manifold.
(e) Disconnect the knock sensor 1 connector.