instrument panel TOYOTA CAMRY 1999 Service Repair Manual

I08431
Theft Deterrent ECU
14
T4 Instrument Panel J/B
Door Unlock Detection
Switch Front LHJ6
J/C
L±RLSWD
LSWP
LSWR 15
T4
16
T4 L±R L±R11
IE1F F
W±B*1
IE
4
*1
1*21*1
4*2
J10E 4 1
W±B*1
J38
J/C
A A 20
IE1
W 7
1G 3
1V
W±B
W±B
*2
J37
J/C
C C
Y Y Y11
IM1 Door Unlock Detection
Switch Front RH
W±B
*1W±B*1
J39
J/C
A A
W±B
*2
20
IM1
W±B
IJ
L±Y J10EJ/C
L±Y
L±Y
L±Y
2
IF2 4
BO1 41 Door Unlock Detection
Switch Rear LH
Door Unlock Detection
Switch Rear RH W±B W±B6
BO1 A J40
J/C
BL
BN
IK
J9DL±Y L±Y
L±YW±B W±B
W±B W±B3
IN2 4
BP1 41 6
BP1
*1: TMC Made
*2: TMMK Made DI±862
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
1097 Author: Date:
Door Unlock Detection Switch Circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions in this circuit. It is used as one of the operating conditions for the key confinement
prevention function.
WIRING DIAGRAM
DI074±06

I04444
Theft Deterrent ECU
DSWD
CTY
DSWP
4
T4
T4
T41
5 R±G A
J10 C
R±G 1
1G 7
1S
Integration
Relay
4
1G R±G
Door Courtesy
Switch Front LH
1
R±W J/C
E
J34 D
J33
D
J33
D J33 6
4
12
1S R±B
1 Door Courtesy
Switch Rear LH
J9
R±W
R±W 8
IN2 R±W
1 Door Courtesy
Switch Rear RH
R±W
1
Diode
2
R±G J/C
E
J33
J34D
E
J33R±G R±G
IN26
R±G
1 Door Courtesy
Switch Front RH
J/C
Instrument panel J/B DI±864
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
1099 Author: Date:
Door Courtesy Switch Circuit
CIRCUIT DESCRIPTION
The door courtesy switch goes ON when the door is opened and goes OFF when the door is closed.
WIRING DIAGRAM
DI075±06

DI08J±08
I08439
Stop Light SwitchCruise Control Actuator
 Actuator Motor
 Actuator Magnetic Clutch
Cruise Control ECUCruise Control switch
Main Switch
Control Switch
DLC2 Instrument Panel Junction Block No.1
 ECU±IG Fuse
 STOP Fuse
5S±FE engine: 1MZ±FE engine:
Vehicle Speed Sensor
Park/Neutral Position Switch Park/Neutral Position SwitchVehicle Speed Sensor
DI±876
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1111 Author: Date:
PARTS LOCATION

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

I00157
Instrument panel junction block No.1:
STOP Fuse
I00133
21
43
DI±884
± DIAGNOSTICSCRUISE CONTROL SYSTEM
111 9 Author: Date:
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

I00283
Cruise Control ECU
CMS
CCS
GND
CMS
W±L
W±B
W Cruise Control Switch

Main Switch

Control Switch
1J
78
W±B5
4
3
W±B MAIN
CANCEL
SET/COAST
RES/ACC
A11
10
16 CCS
EP
J7
J7J8 AJ/C
A
A
1J
W±B J/C
IGC15
C15
C15
J11
Instrument Panel J/B DI±892
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1127 Author: Date:
DTC 32 Control Switch Circuit (Cruise Control
Switch)
CIRCUIT DESCRIPTION
This circuit carries the SET/COAST, RESUME/ACCEL and CANCEL signals (each voltage) to the ECU.
DTC No.Detection ItemTrouble Area
32Short in control switch circuit.
Cruise control switch
Harness or connector between cruise control ECU and
cruise control switch, cruise control switch and body ground
Cruise control ECU
WIRING DIAGRAM
DI08R±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

I08433
Cruise Control ECU
Instrument Panel J/B
Clutch Switch
PNP Switch GAUGE
1K
D 3 J29
J/C
J/C
J21 (5S±FE)
J24 (1MZ±FE) B±Y1JC15 For M/T
J/C
B±R A
A
A B±R
R±L R±L
2
1 D
J27 F
J28
F J28
R±L
R±L 2
II2
A
A
R±L210
B±R9
II2For A/T
FL BLOCK IG1
Battery Ignition Switch
2
4AM1
Instrument Panel J/B
AM1
1B1
1K2W
B±R
F91
F41
ALT
B±G
FL MAIN 11 DI±904
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1139 Author: Date:
Park/Neutral Position Switch Circuit
CIRCUIT DESCRIPTION
When the shift position is except D, a signal is sent from the park/neutral position switch to the ECU. When
this signal is input during cruise control driving, the ECU cancels the cruise control.
WIRING DIAGRAM
DI08V±11

I08434
Instrument Panel J/B
Ignition Switch
ECU±IG
B 9 J12
J/C
B±YC15
B±R C
C
GND
IG1
2
B±R IG1
Battery24
AM1
Instrument Panel J/B
AM1 1K1
W
B±GF9
F41
W±B
FL MAINCruise Control ECU
1J9
B±R
1K
1B1
16
C15
W±B
W±BJ8A
J7AJ/C
1J8
1J7Instrument Panel J/B
A J11
J/C FL BLOCK
ALT
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±909
1144 Author: Date:
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc, when terminal GND and the cruise
control ECU case are grounded.
WIRING DIAGRAM
DI08X±11

I00157
Instrument panel junction block No.1:
ECU±IG
Fuse
AB0119
I00147
I00176
ON
GND
(±) (+)B
DI±910
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1145 Author: Date:
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove the ECU±IG fuse from instrument panel junction block
No.1.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to ECU±IG fuse.
OK
2 Check voltage between terminals B and GND of cruise control ECU connector.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals B and GND of ECU con-
nector.
OK:
10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG