TOYOTA AVALON 2001 Service Repair Manual

AB0119
I00142
I00173
ON
STP-
(-) (+)
DI-580
- DIAGNOSTICSCRUISE CONTROL SYSTEM
736 Author
: Date
:
2001 AVALON (RM808U)
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 in
problem symptom table (See page DI-560).
NG
4 Check for open in harness and connectors between terminal STP- of cruise con-
trol ECU and stop light switch (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN-30).

DI08G-10
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
 Cruise MAIN
indicator light Remains ON  Does not light up  Blinking Symptoms
DTC Check1st Time2nd Time
 Normal Code  Malfunction Code (Code )
 Normal Code  Malfunction Code (Code ) DI-550
- DIAGNOSTICSCRUISE CONTROL SYSTEM
706 Author
: Date
:
2001 AVALON (RM808U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI0EJ-09
DI-556
- DIAGNOSTICSCRUISE CONTROL SYSTEM
712 Author
: Date
:
2001 AVALON (RM808U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below and proceed to the appropriate page.
DTC No.
(See Page)Circuit InspectionTrouble Area
11, 15
(DI-561)Actuator Motor Circuit

Actuator motor

Harness or connector between cruise control ECU and
actuator motor

Cruise control ECU
12
(DI-563)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
14
(DI-566)Actuator Mechanical Malfunction
Actuator motor (actuator lock: motor, arm)

Cruise control ECU
21
(DI-568)Open in Vehicle Speed Sensor Circuit

Combination meter

Harness or connector between cruise control ECU and com-
bination meter, combination meter and vehicle speed sensor

Vehicle speed sensor

Cruise control ECU
23
(DI-571)Vehicle Speed Signal Abnormal
Vehicle speed sensor

Cruise control ECU
32
(DI-572)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
41Cruise control ECU
Cruise control ECU
42Source voltage drop
Power source
51
(DI-575)Idle Signal Circuit

Throttle position sensor

Harness or connector between ECM and throttle position
sensor

Harness or connector between cruise control ECU and ECM

Cruise control ECU

DI08F-13
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 Symptom 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 hand-held tester or break-
out-box. P. DI-550
P. DI-551
P. DI-556
P. DI-556
P. IN-20
P. DI-560
P. DI-561 - DI-594
OKNG
Symptom occurs
Malfunction code
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-549
705 Author
: Date
:
2001 AVALON (RM808U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.

DI08J-10
I12541
Cruise Control
Actuator
ECM
Cruise Control Switch
Ignition Switch
Instrument Panel
Junction Block

ECU-IG No. 1 Fuse

ECU-IG No. 2 Fuse

STOP Fuse
Vehicle Speed Sensor
Park/Neutral Position Switch
Cruise Control ECU
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-557
713 Author
: Date
:
2001 AVALON (RM808U)
PARTS LOCATION

I11635
DI6L5-01
BE4034
Indicator Light
1.5 sec.0.5 sec.
ON
OFF
I00169
DLC2
Tc E 1
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-551
707 Author
: Date
:
2001 AVALON (RM808U)
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-43) 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
F07887
Hand-held
Tester
DLC3
I00169I13679I14212
(d)
DLC2
TcE1
(c)
I13679
DI-552
- DIAGNOSTICSCRUISE CONTROL SYSTEM
708 Author
: Date
:
2001 AVALON (RM808U)
HINT:

If the DTC is not output, inspect the diagnosis circuit (See
page DI-594).

As an example, the blinking patterns for codes; normal,
11 and 21 are shown in the illustration.
2. USING HAND-HELD TESTER
(a) Hook up the hand-held tester to the DLC3.
(b) Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:
Hand-held tester has a ºSnapshotº function which records the
monitored data.
Please refer to the hand-held tester operator's manual for fur-
ther details.
3. DTC CLEARANCE (ERASE MODE)
HINT:
During in the erase mode, diag detection does not work.
(a) Drive at about 15 km/h or below.
(b) Using SST, connect terminals Tc and E1 of DLC2.
SST 09843-18020
(c) Push 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.
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.

I13679
I13679
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-553
709 Author
: Date
:
2001 AVALON (RM808U)
(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 pushed to RES/ACC, and that the
vehicle cruises at the set speed when the switch is
released.
(4) Momentarily raise the control switch push 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 push 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).

I13679
I13679
DI-554
- DIAGNOSTICSCRUISE CONTROL SYSTEM
710 Author
: Date
:
2001 AVALON (RM808U)
(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

Push 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

Push the cruise control switch to CANCEL
(4) After the control switch is pushed 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 cancellation.

I13679
(a)
(a)(b)
No.Operation MethodCRUISE MAIN Indicator Light
Blinking PatternDiagnosis
1 Push SET/COAST switch ON
2Push RES/ACC switch ON
3Push CANCEL switch ON
Turn stop light switch ON
Depress brake pedal
Turn PNP switch OFF
(Shift to except D position)
4Drive at about 40 km/h
(25 mph)or higher
Drive at about 40 km/h
(25 mph) or below
LightON
OFF
LightON
OFF
LightON
OFFSwitch ON
Switch OFF
LightON
OFFSwitch OFF
Switch ONSET/COAST switch circuit
is normal
RES/ACC switch circuit
is normal
CANCEL switch circuit
is normal
Stop light switch circuit
is normal
PNP switch circuit is
normal
Vehicle Speed Sensor is
normal
LightON
OFF LightON
OFF
1sec.
0.25 sec.0.25 sec.
Turn clutch switch OFF
(Depress clutch pedal)Clutch switch circuit
is normal
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-555
711 Author
: Date
:
2001 AVALON (RM808U)
5. INPUT SIGNAL CHECK
HINT:
(1) For check No.1 ~ No.3:
Turn ignition switch ON.
(2) For check No.4:

Jack up the vehicle.

Start the engine.

Shift to D position.
(a) Push the control switch to SET/COAST or RES/ACC posi-
tion and hold it down or up.
(b) Push the main switch ON.
(c) Check that the CRUISE MAIN indicator light blinks twice
or 3 times repeatedly after 3 seconds.
(d) Push the SET/COAST or RES/ACC switch OFF.
(e) Operate each switch as listed in the table below.
(f) Read the blinking pattern of the CRUISE MAIN indicator
light.
(g) After performing the check, turn the main switch OFF.
HINT:
When 2 or more signals are input to the ECU, the lowest num-
bered code will be displayed 1st.