sensor TOYOTA AVALON 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: AVALON, Model: TOYOTA AVALON 2001Pages: 1897, PDF Size: 26.61 MB
Page 855 of 1897
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).
Page 856 of 1897
- 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
Page 860 of 1897
I13614
IDL 13
IDLOE725 ECMCruise Control ECU
Y
C15
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-575
731 Author: Date:
2001 AVALON (RM808U)
DTC 51 Idle Signal Circuit
CIRCUIT DESCRIPTION
When the idle switch is turned ON, a signal is sent to the ECU. The ECU uses this signal to correct the dis-
crepancy between the throttle valve position and the actuator position sensor value to enable accurate
cruise control at the set speed. If the idle switch is malfunctioning, problem symptoms also occur in the en-
gine, so also inspect the engine.
DTC No.Detection ItemTrouble Area
51Short in idle signal circuit.
Harness or connector between ECM and throttle position
sensor
Throttle position sensor
Harness or connector between cruise control ECU and ECM
Cruise control ECU
WIRING DIAGRAM
DI6L6-01
Page 861 of 1897
AB0119
I00167
I00172
ON
IDL
(-) (+)
DI-576
- DIAGNOSTICSCRUISE CONTROL SYSTEM
732 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check voltage between terminal IDL of cruise control ECU connector and body
ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Disconnect the ECM connector.
(c) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IDL of ECU connector and
body ground when the throttle valve is fully closed and fully
opened.
OK:
Throttle valve positionVoltage
Fully opened10 - 14 V
Fully closedBelow 2 V
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI-560).
NG
2 Check harness and connector between ECM and throttle position sensor (See
page IN-30).
NG Repair or replace harness or connector.
OK
3 Check throttle position sensor circuit (See page DI-38).
NG Replace throttle position sensor.
OK
Page 862 of 1897
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-577
733 Author: Date:
2001 AVALON (RM808U)
4 Check throttle position sensor.
NG Replace throttle position sensor.
OK
5 Check for open and short in harness and connector between cruise control ECU
and ECM (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN-30).
Page 870 of 1897
I13611
Cruise Control ECU
9
B
Y-R
IG B 3 1
4IG1 RELAY
2
AM1 ECU-IG NO. 2
5 5
B-L
ALT FL Block
F6
B
FL MAIN
BatteryW-BW-B 1
2G
F8
W-B AA
J5
J/C 1 F101 1
1G
3
1B
1
2H13
1B
4
1C2
3C2
3D
7
IF1
7
3A20
3BGND
1W-B16 W-B WY-R
W-R42
I15Ignition Switch
C15
W-L
W-L
B-LIG1 AM1
2
1J/B No. 3
Driver Side J/B
Engine Room J/B
Engine Room R/B No. 5
J/B No. 3
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-587
743 Author: Date:
2001 AVALON (RM808U)
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-15
Page 883 of 1897
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 MalfunctionActuator 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 AbnormalVehicle 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 ECUCruise control ECU
42Source voltage dropPower 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
Page 885 of 1897
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
Page 886 of 1897
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.
Page 890 of 1897
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.