Page 602 of 1897
F09801
ABS Actuator
and ECU
A713
Battery J/B No. 3A21
Active Light Relay
Multi DisplayY-B
BRAKEPKB
PKB
Ignition Switch
IF1 A721
EBDW IE15
Y-B
6 5
8 3 Y-G
3B14
3A
6 3B
5
Y-G
B4
15R-W
IE116
R-Y
Y-G
1
P3
Parking
Brake
Switch W-BBody ECU
J1
J/CDriver Side J/B
B1
Bake Fluid
Level Warning
Switch
J/B No. 3
R-W3H
153B
15
15
3A
12
1I8
1H
R-W
1
2
B B
Engine Room J/BDriver Side J/BGAUGE No. 1 IG1 Relay
4
2D4
2F
W-B
ED
R-WR-WIC17
M63
M64R-B
J/B No. 4
13
4F4
4D
R-B
10
1D 1
2
3 44
1C 3
1B1
1G W
IGW-BEngine Room J/BEngine Room R/B No. 57
BAM1
B-L
FL Block
ALT5 512 1
2H 1
2G
1
F8
F10F61
BFL MAIN W-B
142
W-R
W-L
W-L R-Y DI-240
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
396 Author: Date:
2001 AVALON (RM808U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up when the brake fluid is insufficient, parking brake is applied or the EBD
is defective.
WIRING DIAGRAM
DI6NL-02
Page 606 of 1897
DI6NC-01
F09803
ABS Actuator and ECU
+B
BAT
GND1
GND2 W-B
FL MAINFL Block
ALT
B-L
BatteryA717
A718
A719
A716 L
L
W-B
EE5 5
12 B
10 2F
42F 12H
12G
W-B
ED 1
F8 1
F6
BABS Engine Room R/B No. 5
Engine Room J/B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-219
375 Author: Date:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC 11 ABS Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
When any of the following 1. through 3. is detected:
1. 3 or more solenoids are shown faulty in response and
simultaneously solenoid supply voltage is detected
faulty.
2. Solenoid relay will not be switched OFF.
3. Solenoid relay is frozen in spite of its high valve relay
supply voltage.
ABS solenoid relay
ABS solenoid relay circuit
WIRING DIAGRAM
Page 611 of 1897
DI-224- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
380 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check the DTC once more.
PREPARATION:
(a) Clear the DTC (See page DI-212).
(b) Turn the ignition switch OFF.
CHECK:
Turn the ignition switch ON, and check if the same DTC is stored in the memory.
NO No problem.
YES
Replace ABS ECU.
Page 618 of 1897
F09798
Battery W-B
W-BGND1ABS Actuator
and ECU
A715
EE EDY-R
IG1
W-R
ALT
AM1 Driver Side J/B
IG1 RelayECU-IG
No. 2
A719
GND2
A716 1H2
1C4 2
3 1
4 1G1
1B3
W42Ignition Switch
W-L
7IF1
W-L
5
52
1
BEngine Room R/B No. 5
FL Block Engine Room J/B
2H1
2G1
2F4
2F10 B-L
W-B F61
F81
F101
B
FL MAIN IGIG1 AM1
W-B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-231
387 Author: Date:
2001 AVALON (RM808U)
DTC 41 Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
At a vehicle speed of about 6 km/h (4 mph), low battery
voltage is less than 9.4 V during non-operation of ABS
control or less than 8.8 V during operation of ABS control,
and high battery voltage is more than 17.4 V.Battery
Charging system
Power source circuit
WIRING DIAGRAM
DI6NH-01
Page 620 of 1897
F00067
(+)(-) ON
A7
151916
F00068
(+) (-) LOCK
A71916
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-233
389 Author: Date:
2001 AVALON (RM808U)
3 Check voltage between terminals IG1 (A7 - 15) and GND (A7 - 16, 19) of the
brake actuator connector.
PREPARATION:
Disconnect the connector from the brake actuator.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals A7 - 15 and A7
- 16, 19 of the brake actuator harness side connector.
OK:
Voltage: 10 - 14 V
OK Check and replace ABS ECU.
NG
4 Check continuity between terminals GND (A7 - 16, 19) of brake actuator connec-
tor and body ground.
CHECK:
Measure the resistance between terminal A7 - 16, 19 of brake
actuator harness side connector and body ground.
OK:
Resistance: 1 W or less
NG Repair or replace harness or connector.
OK
Check for open circuit in harness and connector between terminal IG1 of brake actuator
and ECU-IG fuse (See page IN-30).
Page 624 of 1897
F00067
ON
(+) (-)
15
19
16 A7
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-237
393 Author: Date:
2001 AVALON (RM808U)
4 Check voltage between terminals IG1 (A7 - 15) and GND (A7 - 16, 19) of brake
actuator connector.
PREPARATION:
Disconnect the connector from the brake actuator.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals A7 - 15 and A7
- 16, 19 of brake actuator harness side connector.
OK:
Voltage: 10 - 14 V
NG Check for open or short circuit in harness and
connector between ECU-IG fuse and IG1 of
brake actuator (See page IN-30).
OK
5 Check connection of brake actuator connector.
CHECK:
Check the connection of the brake actuator connector and check the ABS warning light goes off.
OK Repair or replace harness or connector.
NG
Check and replace ABS ECU.
Page 625 of 1897
F09805
ABS Actuator and ECU
DLC2LG-R
LG-RLG-RTc 12
A7 7
1H 3B 4
Tc 4
EB5
1I 4
133A 3G
22 II2
W-BLG-R
DLC1 LG-R
LG-R6
4H 6
4A
Tc
E13J/B No. 4
Driver Side J/B J/B No. 3
11
F10163
DLC2
Tc E1
DLC1
Tc ON
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-245
401 Author: Date:
2001 AVALON (RM808U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting between terminals Tc and E1 of the DLC1 causes the ECU to display the DTC by flashing the
ABS warning light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Tc and E
1 of
DLC1 or terminal Tc of DLC2 and body ground.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Tc
and E
1 are connected, the ECU may be defec-
tive.
NG
DI6NN-01
Page 628 of 1897
AB0119S08096
F00446
Ts
DLC1Ts
DLC1Ts
DLC1Ts
DLC1Ts
DLC1Ts
DLC1 E
1
ON
DI-248- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
404 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and E
1 of
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, the ECU may be defec-
tive.
NG
2 Check for open and short circuit in harness and connector between ABS ECU
and DLC1, DLC1 and body ground (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.
