2001 TOYOTA AVALON light

DI-302
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
458 Author
: Date
:
2001 AVALON (RM808U)
3 Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness or connector.
OK
4 Check whether or not the ECU terminal STP input voltage is changed when the
stop light switch is turned on and off.
NO Check the stop light switch circuit (See page
BE-36).
YES
Check and replace ABS & BA & TRAC & VSC
ECU.

F09817
ABS & BA & TRAC
& VSC ECU
48
A20
STP
ALTJ/B No. 3
FL Block
FL MAIN
Battery Driver Side J/B
S4
Stop Light SwitchG-W
STOP
L5
Light Failure SensorR8
Rear Combination
Light RH
G-R
J12
J/C J/B No. 4
16
4D 16
4F 3
3F 3
3C 5
1B 3
1D
4 1E
5IK1
7 12R
Driver Side J/B
11
1D 1
1G W
1
F101
F6B2
G-R W-B BB
B3
6
C Stop R7
Rear Combination
Light LH
3
6 Stop
1 R-W
W-B H11
High Mounted
Stop Light
21
C
C
W-B
BM G-R W-B G-W G-W
G-W
G-W
G-W
J12
J/C
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-303
459 Author
: Date
:
2001 AVALON (RM808U)
DTC C1249 / 58 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1249 / 58
After the ignition switch is turned ON, the condition that the
STP terminal voltage of ECU is 55 % to 75 % of supplied
voltage, continues for 1 sec. or more.
Stop light switch

Stop light switch circuit
WIRING DIAGRAM
DI6O8-03

F07897
48
DI-304
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
460 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that the stop light lights up when the brake pedal is depressed and turns off when the brake pedal
is released.
NG Repair stop light circuit (See page BE-36).
OK
2 Check voltage between terminal STP (48) of ABS & BA & TRAC & VSC ECU and
body ground.
PREPARATION:
Disconnect the connector from the ABS & BA & TRAC & VSC
ECU.
CHECK:
Measure the voltage between terminal 48 of ABS & BA & TRAC
& VSC ECU harness side connector and body ground when the
brake pedal is depressed.
OK:
Voltage: 7.5 - 14 V
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
3 Check for open circuit in harness and connector between terminal STP of ABS &
BA & TRAC & VSC ECU and stop light switch (See page IN-30).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI-266).

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-305
461 Author
: Date
:
2001 AVALON (RM808U)
DTCC1300 / 62ABS & BA & TRAC & VSC ECU Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1300 / 62ABS & BA & TRAC & VSC ECU internal malfunction is
detected.
ABS & BA & TRAC & VSC ECU
INSPECTION PROCEDURE
1 Check the DTC for the ABS and VSC (See page DI-252).
*1 Repair ABS and VSC control system according
to the code output.
*2
Check if ECU is connected to malfunction in-
dicator light.
*1: Output NG code
*2: Malfunction indicator light remains ON
DI6O9-01

DI-318
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
474 Author
: Date
:
2001 AVALON (RM808U)
DTC Non Code Translate ECU Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Non CodeTranslate ECU internal malfunction is detected.

Tc terminal circuit

Brake warning light circuit

Translate ECU
INSPECTION PROCEDURE
1 Check the BRAKE warning light circuit (See page DI-330).
NG Repair or replace the BRAKE warning light cir-
cuit.
OK
2 Check the Tc terminal circuit (See page DI-342).
NG Repair or replace the Tc terminal circuit.
OK
Check and replace Translate ECU.
DI6OF-04

F09822
ABS & BA &
TRAC & VSC ECU
IND A2031
V V18
IL1 M6 M69
4SLIP
R-B J/B No. 4
4D
4F 413
R-B
Driver Side J/B
1G1
1D10
1B1C 3 41 2IG1 Relay GAUGE
No. 1
W
W-R
2
IG1
AM1 4Ignition Switch
IF17
W-L
551
2 AM1 Engine Room R/B No. 5
B
2G
2H1 1 Engine Room J/B
B-L
F6 1 F10 F81
1
ALT FL Block
IG
Battery
FL MAIN
B Multi Display
4 3
W-BW-L
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-333
489 Author
: Date
:
2001 AVALON (RM808U)
SLIP Indicator Light Circuit
CIRCUIT DESCRIPTION
The SLIP indicator light blinks during TRAC & VSC operation.
WIRING DIAGRAM
DI6OL-03

DI-334
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
490 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 operation of the SLIP indicator light.
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 ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the SLIP indicator light can be shown on the combination meter with the TOY-
OTA hand-held tester.
OK Go to step 4.
NG
2 Check that the SLIP indicator light is ON for 3 seconds immediately after ignition
switch is turned ON.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
3 Check SLIP indicator light.
See combination meter troubleshooting on page BE-2.
NG Repair or replace combination meter. Check
and replace ABS & BA & TRAC & VSC ECU.
OK

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-335
491 Author
: Date
:
2001 AVALON (RM808U)
4 Check for open and short circuit in harness and connector between ABS & BA
TRAC & VSC ECU and SLIP indicator light (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.