2001 TOYOTA AVALON Service Repair Manual

I14465
STOP Fuse
I00133
21
43
DI-564
- DIAGNOSTICSCRUISE CONTROL SYSTEM
720 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check STOP fuse.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Remove the STOP fuse from instrument panel junction
block.
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

I00311
4
3
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-565
721 Author
: Date
:
2001 AVALON (RM808U)
3 Check resistance between terminals L and GND of actuator magnetic clutch.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between terminals 3 and 4.
OK:
Resistance: 34.65 - 42.35 W.
NG Replace cruise control actuator.
OK
4 Check for open and short in harness and connectors between cruise control
ECU and actuator magnetic clutch, actuator magnetic clutch and body ground
(See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN-30).

I00055
4
3(+)
(-)
DI-566
- DIAGNOSTICSCRUISE CONTROL SYSTEM
722 Author
: Date
:
2001 AVALON (RM808U)
DTC 14 Actuator Mechanical Malfunction
CIRCUIT DESCRIPTION
The circuit detects the rotation position of the actuator control plate and sends a signal to the ECU.
DTC No.Detection ItemTrouble Area
14Cruise control actuator mechanical malfunction.

Actuator lock: (motor, arm)

Actuator motor

Cruise control ECU
WIRING DIAGRAM
See page DI-563.
INSPECTION PROCEDURE
1 Check cruise control actuator arm locking operation
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
(a) Connect the positive (+) lead from the battery to the termi-
nal 3 of actuator and the negative (-) lead to terminal 4.
NOTICE:
Do not connect the high tension cables to the wrong bat-
tery terminal. The cruise control actuator will be damaged.
(b) Move the control plate by hand.
OK:
Control plate doesn't move.
NG Replace cruise control actuator.
OK
DI08O-14

I03209
Fully open side
Fully Closed sideControl plate
Control plate(+)
(-) (+)
(-) 4
321
4
3
21
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-567
723 Author
: Date
:
2001 AVALON (RM808U)
2 Check cruise control actuator operation.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Connect the positive (+) lead from the battery to terminals 1 and
3 of actuator, connect the negative (-) lead to terminals 2 and
4 of actuator.
OK:
Control arm moves to fully open side
CHECK:
Connect the positive (+) lead from the battery to terminals 2 and
3 of actuator, connect the negative (-) lead to terminals 1 and
4 of actuator.
OK:
Control arm moves to fully colsed side
NG Replace cruise control actuator.
OK
3 Check harness and connector between cruise control ECU and cruise control ac-
tuator (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN-30).

I00292
Vehicle Speed Sensor
ECUCombination Meter
Cruise Control ECU
4 pulses/
1 rotation
of rotor shaft4 pulses/
1 rotation
of rotor shaft
I13616
Cruise Control ECU
12 Combination Meter
3C10
V-W V-W
Y-R BR
to
ABS ECU3F1
M322
M3 M37
BR IJ1 11
EBM3
to ECU-IG Fuse 18
SPD
C15
J/B No. 3
1 DI-568
- DIAGNOSTICSCRUISE CONTROL SYSTEM
724 Author
: Date
:
2001 AVALON (RM808U)
DTC 21 Open in Vehicle Speed Sensor Circuit
CIRCUIT DESCRIPTION
The signal from the vehicle speed sensor circuit is sent to cruise control ECU as vehicle speed signal.
The rotor shaft is driven by the gear of the transmission.
For each rotation of the shaft, the vehicle speed sensor sends a 4-pulse signal through the combination
meter to the cruise control ECU (See the following installation).
This signal is converted inside the combination meter and sent as a 4-pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
DTC No.Detection ItemTrouble Area
21Speed signal is not input to the cruise control ECU while cruise
control is set.

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
WIRING DIAGRAM
DI08P-18

Input SignalIndicator Light
Blinking Pattern
Drive at about
40 km/h (25 mph)
or below
Drive at about
40 km/h (25 mph)
or higherLightON
OFF
LightON
OFF
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-569
725 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Input signal check.
CHECK:
(a) See input signal check on page DI-551.
(b) Check indicator light operation when driving with vehicle
speed above 40 km/h (25 mph), and with vehicle speed
below 40 km/h (25 mph).
OK:
Vehicle speed above 40 km/h (25 mph):
Indicator light blinks
Vehicle speed below 40 km/h (25 mph):
Indicator light stays on
OK Check and replace cruise control ECU (See
page IN-30).
NG
2 Check speedometer circuit (See Combination meter troubleshooting on page
BE-2).
NG Repair or replace harness, connector or com-
bination meter assembly.
OK
3 Check harness and connector between cruise control ECU and combination me-
ter, combination meter and vehicle speed sensor (See page IN-30).
NG Repair or replace harness or connector.
OK

DI-570
- DIAGNOSTICSCRUISE CONTROL SYSTEM
726 Author
: Date
:
2001 AVALON (RM808U)
4 Check vehicle speed sensor (See page BE-53).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU (See
page IN-30).

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-571
727 Author
: Date
:
2001 AVALON (RM808U)
DTC 23 Vehicle Speed Signal Abnormal
CIRCUIT DESCRIPTION
See page DI-568.
DTC No.Detection ItemTrouble Area
23Vehicle speed sensor pulse is abnormal.
Vehicle speed sensor

Cruise control ECU
WIRING DIAGRAM
See page DI-568.
INSPECTION PROCEDURE
1 Check vehicle speed sensor (See page BE-53).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU (See
page IN-30).
DI08Q-13