TOYOTA CAMRY 1999 Service Repair Manual

Input SignalIndicator Light
Blinking Pattern
Stop Light
switch ON
LightOFF
ONSW OFF
SW ON
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±899
1134 Author: Date:
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±2).
OK
2 Input signal check.
CHECK:
(a) See input signal check on DI±870.
(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±879).
NG

AB0119
I00142
I00173
ON
STP±
(±) (+)
DI±900
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1135 Author: Date:
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±879).
NG
4 Check for open in harness and connectors between terminal STP± of cruise con-
trol ECU and stop light switch (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±31).

I08432
S2OD 14Cruise Control ECU *1: 1MZ±FE
*2: 5S±FE (w/ Immobiliser)
*3: 5S±FE (w/o Immobiliser)
ECT No.2
SolenoidECT C15
6
C15 Y±B
L±B ECM
24 18 20
E8 E7 E7
*1 *2 *3 OD1
8216
E11
E9 E9
*1 *2 *3L±B L±B7
II2 J26
*1
J25*2
J/C
A
AA
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±901
1136 Author: Date:
Electronically Controlled Transmission Communication Circuit
CIRCUIT DESCRIPTION
When driving uphill under the cruise control, in order to reduce shifting due to ON±OFF overdrive operation
and to provide smooth driving, when down shifting in the electronically controlled transmission occurs, a sig-
nal to prevent upshift until the end of the uphill slope is sent from the cruise control ECU to the electronically
controlled transmission.
Terminal ECT of the cruise control ECU detects the shift change signal (output to electronically controlled
transmission No. 2 solenoid) from the ECM.
If the vehicle speeds down, also when terminal ECT of the cruise control ECU receives down shifting signal,
it sends a signal from terminal OD to ECM to cut overdrive until the end of the uphill slope, and the gear shifts
are reduced and gear shift points in the electronically controlled transmission are changed.
WIRING DIAGRAM
DI08U±11

AB0119
I00143
I00174
ON
O/D
(±) (+)
DI±902
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1137 Author: Date:
INSPECTION PROCEDURE
1 Check operation of overdrive.
PREPARATION:
Test drive after engine warms up.
CHECK:
Check that overdrive ON e OFF occurs by operation of OD switch ON±OFF.
NG Check and repair electronically controlled
transmission (See page DI±389).
OK
2 Check voltage between terminal OD of harness side connector of cruise control
ECU and body ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
(c) Disconnect the ECU connector.
CHECK:
Measure voltage between terminal OD of harness side connec-
tor of ECU and body ground.
OK:
Voltage: 10 ± 14 V
NG Go to step 5.
OK

I00141
ECT
(±) (+)
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±903
1138 Author: Date:
3 Check voltage between terminal ECT of cruise control ECU connector and body
ground (On test drive).
PREPARATION:
(a) Connect the ECU connector.
(b) Test drive after engine warms up.
CHECK:
Check voltage between terminal ECT of ECU connector and
body ground when OD switch is ON and OFF.
OK:
OD switch positionVoltage
ON8 ± 14 V
OFFBelow 0.5 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG
4 Check harness and connector between terminal ECT of cruise control ECU and
electronically controlled transmission solenoid (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU.
5 Check harness and connector between terminal OD of cruise control ECU and
terminal OD1 of ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±31).

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

Input SignalIndicator Light
Blinking Pattern
Turn PNP switch
OFF (Shift to posi-
tions except D )LightON
OFFSW ON
SW OFF
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±905
1140 Author: Date:
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting.
(5S±FE: See page ST±1)
(1MZ±FE: See page ST±1).
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI±870.
CHECK:
Check the indicator light when shifting into positions except D.
OK:
The indicator light goes off when shifting into posi-
tions except D.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG

AB0119
I00139
I00175
ON
D
(±) (+)
DI±906
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1141 Author: Date:
3 Check voltage between terminal D of cruise control ECU connector and body
ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal D of ECU connector and
body ground when shifting into D position and other positions.
OK:
Shift PositionVoltage
D position10 ± 14 V
Other positionsBelow 1 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG
4 Check harness and connector between cruise control ECU and park/neutral
position switch (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±31).

Input Signal
Indicator Light
Blinking Pattern
Clutch switch
OFF (Depress
clutch pedal)
LightON
OFFSW ON
SW OFF
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±907
1142 Author: Date:
Clutch Switch Circuit
CIRCUIT DESCRIPTION
When the clutch pedal is depressed, the clutch switch sends a signal to the cruise control ECU. When the
signal is input to the cruise control ECU during cruise control driving, the cruise control ECU cancels cruise
control.
WIRING DIAGRAM
Refer to PNP switch circuit on page DI±904.
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting
(5S±FE: See page ST±1)
(1MZ±FE: See page ST±1).
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI±870.
CHECK:
Check the indicator lights when clutch pedal is depressed.
OK:
The indicator light goes off when shifting into clutch
pedal is depressed.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG
DI08W±04

AB0119
I00139
I00175
ON
D
(±) (+)
DI±908
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1143 Author: Date:
3 Check voltage between terminal D of cruise control ECU and body ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal D of cruise control ECU con-
nector and body ground when clutch pedal is depressed and
pushed in.
OK:
Shift PositionVoltage
Clutch pedal depressed10 ± 14 V
Clutch pedal pushed inBelow 1 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±879).
NG
4 Check for open in harness and connector between ECU and GAUGE fuse
(See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±31).