display TOYOTA AVALON 2001 Service Service Manual

DI6N7-01
F07879
F02201
E1Tc
DLC1
F00103
Normal Code
0.25 sec.
0.25 sec. 0.5 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
DI-212- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
368 Author
: Date
:
2001 AVALON (RM808U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Release the parking brake pedal.
(b) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light and BRAKE warning light goes on for
approx. 3 seconds.
HINT:

When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light is lit.

If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit or BRAKE
warning light circuit (See page DI-243, DI-240).
(c) Check the DTC.
(1) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON and read the DTC from
the ABS warning light on the combination meter.
HINT:

If no codes appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI-245 or DI-243).

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(3) Codes are explained in the code table on page
DI-215.
(4) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunction codes are identified at the
same time, the lowest numbered DTC will be dis-
played 1st.

BR3890
F02201
DLC1
Ts E
1
Tc
BR3904
0.13 sec. 0.12 sec.
ON
OFF
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-213
369 Author
: Date
:
2001 AVALON (RM808U)
(d) Clear the DTC.
(1) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 times or more within 5 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of DLC1.
SST 09843-18020
HINT:
Cancellation cannot be done by removing the battery cable or
ECU-IG fuse.
2. SPEED SENSOR SIGNAL CHECK (TEST MODE)
(a) Check the sensor signal.
(1) Using SST, connect terminals Ts and E
1 of DLC1.
SST 09843-18020
(2) Start the engine.
(3) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI-243).
(4) Drive vehicle straight forward.
(5) Drive vehicle at a speed faster than 45 km/h (28
mph) for several seconds.
HINT:
If the brake is applied during the check, the check routine must
be started again.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:

See the list of DTC shown on the next page.

If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunction codes are identified at the same
time, the lowest numbered code will be displayed 1st.

DI6NB-01
DI-218- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
374 Author
: Date
:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during DTC check but a problem still occurs, check the circuits corresponding
to each problem symptom in the order given in the table below and proceed to the relevant troubleshooting
page.
NOTICE:
When replacing ABS ECU, sensor or etc., turn the IG switch OFF.
SymptomSuspect AreaSee page
ABS does not operate
Only when 1. - 4. are all normal and the problem is still
occurring, replace the ABS ECU.
5. Check the DTC reconfirming that the normal code is
output.
6. Power source circuit
7. Speed sensor circuit
8. Check the hydraulic circuit for leakage.
DI-212
DI-231
DI-225
DI-249
ABS does not operate intermittently
Only when 1. - 4. are all normal and the problem is still
occurring, replace the ABS ECU.
1. Check the DTC reconfirming that the normal code is
output.
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the hydraulic circuit for leakage.
DI-212
DI-225
DI-234
DI-249
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI-243
BRAKE warning light abnormal1. BRAKE warning light circuit
2. ABS ECUDI-240
DTC check cannot be done
Only when 1. and 2. are all normal and the problem is still
occurring, replace the ABS ECU.
1. ABS warning light circuit
2. Tc terminal circuit
DI-243
DI-245
Speed sensor signal check cannot be done1. Ts terminal circuit
2. ABS ECUDI-247

F09823
ABS & BA &
TRAC & VSC ECU
WA A2081
47 1
B
W-B
B
BJ4
J/C
W-B W-B
IG Battery FL MAINA21
Active
Light
Relay
F10F8 F61 1
1ALT
W W
W-B
B-L
2G
2H 11
5512 AM1
B
W-LIF17 W-L 22
Y-R
IG1 AM1 4
Ignition Switch W-R 1B 1C1G1B1D
4
3 4 3 1
1
213 10 GAUGE No. 1
ECU-IG
No. 2
Y-R3C
3D 2
11 R-B
R-B 4D
4FM6M6
4
Multi
Display 13 45 R-LR-L
4A4B
4H15
15 15
R-L 14
E1
ABS D2
DLC2
ABS
J/B No. 4
J/B No. 3 Driver Side J/B
Engine Room J/B
Engine Room R/B No. 5J/B No. 4
FL Block IG1
Relay
B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-325
481 Author
: Date
:
2001 AVALON (RM808U)
ABS Warning Light Circuit
WIRING DIAGRAM
DI6OI-03

F09818
ABS & BA &
TRAC & VSC ECU
VSCW A2070
P-B
R-B 15
4D
4F 134 4F15
4C P-BJ/B No. 4
M6 M6
R-B4
10 Multi Display
Driver Side J/B
1G1
1D 10
1B3
1C4
3
4 12 IG1 RelayGAUGE
No. 1
W-R 2
IG1 AM1
4 Ignition Switch
W-L W
IF1
7
W-L
5
5 1 2AM1 Engine Room R/B No. 5
B2G 2H11W-B
IG B-L
Battery
FL MAIN
B
F61 F10 F81 1
ALT
FL BlockVSC
Engine Room J/B DI-322
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
478 Author
: Date
:
2001 AVALON (RM808U)
DTC Always ON Malfunction in ECU
VSC Warning Light Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ON
Either of the following 1. or 2. is detected:
1. There is a malfunction in the ECU internal circuit.
2. There is a malfunction in VSC warning light circuit.
Charging system

VSC warning light circuit
HINT:
TOYOTA hand-held tester may not be able to be used when ECU is defective.
WIRING DIAGRAM
DI6OH-03

F09823
ABS & BA &
TRAC & VSC ECU
WA A2081
47 1
B
W-B
B
BJ4
J/C
W-B W-B
IG Battery FL MAINA21
Active
Light
Relay
F10F8 F61 1
1ALT
W W
W-B
B-L
2G
2H 11
5512 AM1
B
W-LIF17 W-L 22
Y-R
IG1 AM1 4
Ignition Switch W-R 1B 1C1G1B1D
4
3 4 3 1
1
213 10 GAUGE No. 1
ECU-IG
No. 2
Y-R3C
3D 2
11 R-B
R-B 4D
4FM6M6
4
Multi
Display 13 45 R-LR-L
4A4B
4H15
15 15
R-L 14
E1
ABS D2
DLC2
ABS
J/B No. 4
J/B No. 3 Driver Side J/B
Engine Room J/B
Engine Room R/B No. 5J/B No. 4
FL Block IG1
Relay
B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-319
475 Author
: Date
:
2001 AVALON (RM808U)
DTC Always ON Malfunction in ECU
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ON
Either of the following 1., 2. or 3. is detected:
1. The ECU connectors are OFF the ECU.
2. There is a malfunction in the ECU internal circuit.
3. There is a malfunction in ABS warning light circuit.

Charging system

ABS warning light circuit
HINT:
TOYOTA hand-held tester may not be able to be used when the ECU is defective.
WIRING DIAGRAM
DI6OG-02

F09824
Battery
FL MAIN F10 F8
F611 1
ALT
BFL BlockB-L 2G 2H1 1 Engine Room J/B B5512 AM1 Engine Room R/B No. 5 W-LIF17
W-L
2
IG1 AM1 4Ignition Switch W-R W
1C 1G
1B 1D
4
4 3 1
1
2
3 10 GAUGE No. 1 Driver Side J/B
IG1 Relay
W-B
IG
ED CUP
BRAKE
Multi DisplayM6 M3M6R-B
3 4
74D 4F13
4 J/B No. 4
R-B
L-O L-O6
IL1
R-WR-W
R-W
R-W
7
IC13A21
Active
Light
RelayR-Y 8A20
6040 74 68
32 ABS & BA &
TRAC & VSC ECU
FSS LBL PKB EBDW SP1
T5
T5
T5
T5 T5
Y-G
L-B
BR (Shielded)15
25 16
2
11
LBL LVL2PKB2BRL
PKB
Y-G Y-G
R-W
R-WJ/B No. 3
3B 3A
3A 3B 5
15
15 14
1Driver Side J/B
B1
Brake Fluid Level
Warning Switch Translate ECU
1H
1I 12
8
R-W
1 2
W-B J1 J/C
B B
W-BEngine Room J/B
44
2D2FW-B P3
Parking
Brake
SwitchA20
A20
A20
A20 DI-330
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
486 Author
: Date
:
2001 AVALON (RM808U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION

The BRAKE warning light lights up when the brake fluid is insufficient, when the parking brake is ap-
plied or when the EBD is defective.

If the translate ECU detects trouble, it makes VSC warning light lights up while prohibiting VSC & TRAC
control. At this time, the ECU records a DTC in memory. Connect terminals Tc and E
1 of the DLC1 or
DLC2 to make BRAKE warning light blink and output the DTC.
WIRING DIAGRAM
DI6OK-02

DI-286
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
442 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check output value of the deceleration sensor.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the DATALIST mode on the TOYOTA hand-held tester.
CHECK:
Check that the deceleration value of the deceleration sensor displayed on the TOYOTA hand-held tester
is changing when tilting the vehicle.
OK:
Deceleration value must be changing.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
2 Check deceleration sensor (See page DI-252).
NG Replace deceleration sensor.
OK
3 Check for open or short circuit in harness and connector between deceleration
sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness and connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

F07893
DI-288
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
444 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check output value of the yaw rate sensor.
PREPARATION:
(a) Remove the 2 bolts and yaw rate sensor with connector
still connected.
(b) Connect the TOYOTA hand-held tester to the DLC3.
(c) Turn the ignition switch ON and push the TOYOTA hand-
held tester main switch ON.
(d) Select the DATALIST mode on the TOYOTA hand-held
tester.
CHECK:
Check that the yaw rate value of the yaw rate sensor displayed
on the TOYOTA hand-held tester is changing: Place the yaw
rate sensor vertically to the ground and turn the sensor pivoted
on its center.
OK:
Yaw rate value must be changing.
OK Go to step 3.
NG
2 Check whether continuity exists between terminal YD of yaw rate sensor and ter-
minal YD of ABS & BA & TRAC & VSC ECU.
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

F09814
J/B No. 3
15
3B 15
3AABS & BA & TRAC
& VSC ECU
40
A20
LBL Driver Side J/B
Engine Room J/B
M6
Multi
DisplayIC1 Translate
ECU
L-B 25
T5 11
T5
16
T5R-W
7
R-W
3
4
R-B LVL2LBL
BRL R-W
R-W
Level
Warning Switch12
1I 8
1H
R-W
12
BB J1
J/B
W-B
EDDriver Side J/B
GAUGE No. 1
W-B
W-B
J/B No. 4
10
1DR-B4
4D13
4F 4
2D4
2F
BRAKE
DI-290
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
446 Author
: Date
:
2001 AVALON (RM808U)
DTC C1202 / 44 Brake Fluid Level Warning Switch Cir-
cuit
CIRCUIT DESCRIPTION
The brake fluid level warning switch sends appropriate signals to the ECU when the brake fluid level is low-
ered.
HINT:
Depressing the parking brake pedal turns on the brake warning light, but this DTC No. C1202/44 is not out-
put.
DTC No.DTC Detecting ConditionTrouble Area
C1202 / 44
Fluid level in the brake master cylinder reservoir tank re-
mains low for 60 sec. or more. This means brake fluid
warning switch likes on.
Brake fluid level

Brake fluid level warning switch

Brake fluid level warning switch circuit
WIRING DIAGRAM
DI6O3-01