cruise control TOYOTA CAMRY 1999 Service Manual Online

± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±137
(b) Clearance the DTC.
The following actions will erase the DTC and freeze frame
data. Operating an OBD II scan tool (complying with SAE
J1978) or hand±held tester to erase the codes.
(See the OBD II scan tool's instruction book for operating
instructions.)
4. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 ± 80 °C (122 ± 176 °F).
(a) D position test
Shift into the D position and fully depress the accelerator pedal and and check the following points:
(1) Check up±shift operation.
1 " 2, 2 " 3 and 3 " O/D up±shifts take place, at the shift point shown in the automatic shift
schedule (See Pub. No. RM654U on page SS±54).
HINT:

O/D Gear Up±shift Prohibition Control (1. Coolant temp. is 50 °C (122 °F) or less. 2. If there is a 10
km/h (6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 50 °C
(122 °F) or less.)
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3 and 3 " O/D up±shifts.
(3) Check for abnormal noises and vibration.
Run at the D position lock±up or O/D gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential or torque converter clutch, etc.
(4) Check kick±down operation.
While running in the D position, 2nd, 3rd and O/D gears, check to see that the possible kick±down
vehicle speed limits for 2 " 1, 3 " 2 and O/D " 3 kick±downs conform to those indicated on
the automatic shift schedule (See Pub. No. RM654U on page SS±54).
(5) Check abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in D position, O/D gear, at a steady speed (lock±up ON) of about 75 km/h (47 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock±up.
(b) 2 position test
Shift into the 2 position and fully depress the accelerator pedal and check the following points:
(1) Check up±shift operation.
Check to see that the 1 " 2 up±shift takes place and that the shift point conforms to the automatic
shift schedule (See Pub. No. RM654U on page SS±54).
HINT:
There is no O/D up±shift and lock±up in the 2 position.
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.

D01841
3
V
S1B+
L±B Shift Solenoid
Valve No. 1ECM Transaxle
Shift Solenoid
Valve No. 2E2
1
E27
E6
6
E6S2B+
L±BJunction
Connector
from Cruise
Control ECUB
19 B
19
19
B
D05157
S2 S1
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±157
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Measure resistance between terminal S1 or S2 of ECM and body ground.
PREPARATION:
Disconnect the connector from ECM.
CHECK:
Measure resistance between terminal S1 or S2 of ECM and
body ground.
OK:
Resistance: 11 ± 15 W
OK Check and replace the ECM.
NG

Q05352
ECM
14 Cruise Control ECU
ODB+
OD1 20
C16E4Y±B
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±169
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving uphill with cruise control activated, in order to minimize gear shifting and provide smooth cruis-
ing overdrive may be prohibited temporarily under some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels overdrive
shifting until these signals are discontinued.
WIRING DIAGRAM
DI038±05

BE3840
D05153D05153
ON
OD1 (+)
(±)
BE3840
I00143D00057
ON
OD (+) (±)
DI±170
± DIAGNOSTICSAUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
1 Check voltage between terminal OD1 of ECM and body ground.
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure voltage between terminal OD1 of ECM and body
ground.
OK:
Voltage: 9 ± 14 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI±148).
NG
2 Check voltage between terminal OD of cruise control ECU harness side connec-
tor and body ground.
PREPARATION:
(a) Disconnect the cruise control ECU connector.
(b) Turn the ignition switch to ON.
CHECK:
Measure voltage between terminal OD of cruise control ECU
harness side connector and body ground.
OK:
Voltage: 9 ± 14 V
OK Check and replace the cruise control ECU.
NG
3 Check harness and connector between cruise control ECU and ECM.
NG Repair or replace the harness or connector.
OK
Check and replace the ECM.

DI08F±12
Customer Problem Analysis
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptoms Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10
Step 2, 5: Diagnostic steps permitting the use
of the TOYOTA hand±held tester or
TOYOTA break±out±box. P. DI±318
P. DI±319
P. DI±319
P. DI±324
P. IN±19
P. DI±328
P. DI±329
OKNG
Symptom occurs
Malfunction code
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±317
387 Author: Date:
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.

DI08G±09
CRUISE CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occurs
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile Brought in
Auto cancel
occurs
Driving condition
 City driving  Freeway  Up hill  Down hill

After cancel occurred, did the driver activate cruise control
again?
 Yes  No
 Cancel does not
occur With brake ON
 Except D position shift  At 40 km/h (25 mph) or less
 When control SW turns to CANCEL position
 Cruise control
malfunction Slip to acceleration side
 Slip to deceleration side
 Hunting occurs
 O/D cut off does not occur
 O/D does not return
 Switch
malfunction SET  ACCEL  COAST  RESUME  CANCEL

 Remains ON  Does not light up  Blinking Symptoms
DTC Check1st Time2nd Time
 Normal Code  Malfunction Code (Code )
 Normal Code  Malfunction Code (Code ) DI±318
± DIAGNOSTICSCRUISE CONTROL SYSTEM
CUSTOMER PROBLEM ANALYSIS CHECK

I00279CRUISE MAIN Indicator Light
DI1KS±04
BE4034
Indicator light
1.5 sec.0.5 sec.
ON
OFF
I00169
DLC2
Tc E 1
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±319
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch ON.
(2) Check that the CRUISE MAIN indicator light comes
ON when the cruise control main switch is turned
ON, and that the indicator light goes OFF when the
main switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE±1) for the combination meter section.
(b) Check the DTC.
HINT:
If a malfunction occurs in the No. 1 vehicle speed sensor or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stored in memory as
a DTC.
(c) Output of DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and E
1 of DLC2.
SST 09843±18020
(3) Read the DTC on the CRUISE MAIN indicator light.

BE4032
BE4033I00021
Normal code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
4 sec.1.5 sec. 0.5 sec.
2.5 sec.0.5 sec.1.5 sec.
Malfunction codes 11 and 21
Code 11 Code 21
H07517DLC2
I08438
DLC1
TC
E1(b) (d) 5 times
within 3 seconds
(c)
DI±320
± DIAGNOSTICSCRUISE CONTROL SYSTEM
HINT:
If the DTC is not output, inspect the diagnosis circuit (See page
DI±362).
As an example, the blinking patterns for codes; normal, 11 and
21 are shown in the illustration.
2. USING TOYOTA HAND±HELD TESTER
(a) Hook up the TOYOTA hand±held tester to the DLC2.
(b) Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:
TOYOTA hand±held tester has a ºSnapshotº function which re-
cords the monitored data.
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
3. DTC CLEARANCE (ERASE MODE)
HINT:
During in the erase mode, diag detection does not work.
(a) Stop the vehicle.
(b) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843±18020
(c) Pull the cruise control switch to CANCEL.
(d) On the above metioned condition, turn on the cruise con-
trol main switch 5 times within 3 seconds.

N17520
N17520
N17520
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±321
4. PROBLEM SYMPTOM CHECK (ROAD TEST)
(a) Inspect the SET switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Press the control switch to the SET/COAST.
(4) After releasing the switch, check that the vehicle
cruises at the desired speed.
(b) Inspect the ACCEL switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Check that the vehicle speed increases while the
control switch is turned to RES/ACC, and that the
vehicle cruises at the set speed when the switch is
released.
(4) Momentarily raise the control switch upward to the
RES/ACC position and then immediately release it.
Check that the vehicle speed increases by approx.
1.5 km/h (Tap±up function).
(c) Inspect the COAST switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Check that the vehicle speed decreases while the
control switch is turned to SET/COAST, and the ve-
hicle cruises at the set speed when the switch is re-
leased.
(4) Momentarily pull the control switch down to SET/
COAST, and then immediately release it. Check
that the vehicle speed decreases by about 1.5 km/h
(Tap±down function).

N17520
N17520
DI±322
± DIAGNOSTICSCRUISE CONTROL SYSTEM
(d) Inspect the CANCEL switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) When operating one of the following operations,
check that the cruise control system is cancelled
and that the normal driving mode is reset.

Depress the brake pedal

Shift to except D position

Push the main switch OFF

Pull the cruise control switch to CANCEL
(e) Inspect the RESUME switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) When operating one of the following operations
check that the cruise control system is cancelled
and that the normal driving mode is reset.

Depress the brake pedal

Shift to except D position

Push the main switch OFF

Pull the cruise control switch to CANCEL
(4) After the control switch is turned to RES/ACC at the
driving speed of more than 40 km/h (25 mph), check
that the vehicle restores the speed prior to the can-
cellation.