2005 TOYOTA AVENSIS Circuit

C94397
GND
IG1
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±833
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1CHECK DTC FOR VSC
(a)Check the DTCs are output (See page 05±756).
YESREPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
2INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
NOCONNECT CONNECTOR TO ECU
YES
3INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(IG1 TERMINAL)
WITH USING HAND±HELD TESTER:
(a)Check the voltage condition, which is output from the ECU and displayed \
on the hand±held tester. OK:
ºNormalº is displayed.
WITHOUT USING HAND±HELD TESTER:
(a)Disconnect the skid control connector.
(b)Turn the ignition switch ON.
(c)Measure the voltage between terminals IG1 and GND ofthe skid control ECU harness side connector.
OK:
Voltage: 10 to 14 V
OKREPLACE ABS & TRACTION ACTUATOR ASSY (See page 32±57)
NG
4 INSPECT BATTERY
OK:
Voltage: 10 to 14 V NG INSPECT CHARGING SYSTEM
OK

05±834
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(DLC3 ± SKID CONTROL ECU)
(a)Check for a short circuit in harness and connector between terminal Tc of the DLC3 and skid control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
6 CHECK VSC WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
7 CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± COMBINATION METER)
(a) Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

F45147
Skid Control ECU
with Actuator
1 21
1A
1AM2
1 2 33
ALT Engine Room R/B No.3
3
W±B
S1 10
GND1GND2
S16 W±BW±B
EAB (*2)
IJB (*2)B±G (*1)
B±G (*1) FL MAIN
Battery1
ALT AM1
Engine Room J/B No.4
1
4B
1
22
4 AM2AM1
11
4A
4D1
ED11
IE41
IP1 B±RB±R B±G (*1)
B±L (*2)
W (*2)B±R DH DN
5 DB18 18
DA
1DH2
DA9
DH1 53IG1 Relay
ECU±IGIGN Driver Side J/B
G±R J/C
J8 J26 J8 J26CA CA
(*3) (*4) (*3) (*4)B±W B±WW±RR±W R±W
R±W
W±R J/C
J10 J20 J10 J20GC GC
(*3) (*4) (*3) (*4)
IE16 IE122
S1 14
S1 34
C1116
C1122
VSC Combination Meter
I13
Ignition SW
IG1
IG26 1 3IG1
VSCW
(*3) (*4)
B±G
(*1)
G±Y
Engine Room R/B No.1 &
Engine Room J/B No.1
*1: 1AZ±FSE
*2: 1CD±FTV*3: LHD
*4: RHDW±B 05±838
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
CIRCUIT DESCRIPTION
When the ECU stores DTC, the VSC warning light illuminates on the combination meter.
WIRING DIAGRAM
0543G±04

±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±839
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 if you are using the hand±held tester and\
start from step 2 if you are not using
the hand±held tester.
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(VSC WARNING LIGHT)
(a)Check that ºONº and ºOFFº of the VSC warning light is shown on th\
e combination meter by the hand±
held tester.
OKREPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)
NG
2 INSPECT VSC WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
3 CHECK HARNESS AND CONNECTOR(COMBINATION METER ± SKID CONTROL ECU)
(a) Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
05±827
AVENSIS REPAIR MANUAL (RM1018E)
DTC AlwaysON MALFUNCTION IN ABS ECU
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ON
Either of the following 1 or 2 is detected:
1. The ECU connectors are disconnected from the ECU.
2. There is a malfunction in the ECU internal circuit.
3. Malfunction in the circuit of meter or ABS warning light
circuit.
Battery

IC regulator

ABS warning light circuit

Power source circuit

Skid control ECU
HINT:
There is a case that hand±held tester cannot be used when ECU is abnormal.
0543D±04

C94397
GND
IG1
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±829
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1CHECK DTC FOR ABS
(a)Check the DTCs are output (See page 05±756).
YESREPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
2INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
NOCONNECT CONNECTOR TO ECU
YES
3INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(IG1 TERMINAL)
WITH USING HAND±HELD TESTER:
(a)Check the voltage condition, which is output from the ECU and displayed \
on the hand±held tester. OK:
ºNormalº is displayed.
WITHOUT USING HAND±HELD TESTER:
(a)Disconnect the skid control connector.
(b)Turn the ignition switch ON.
(c)Measure the voltage between terminals IG1 and GND ofthe skid control ECU harness side connector.
OK:
Voltage: 10 to 14 V
OKREPLACE ABS & TRACTION ACTUATOR ASSY (See page 32±57)
NG
4 INSPECT BATTERY
OK:
Voltage: 10 to 14 V NG INSPECT CHARGING SYSTEM
OK

05±830
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(DLC3 ± SKID CONTROL ECU)
(a)Check for a short circuit in harness and connector between terminal Tc of the DLC3 and skid control ECU (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
6INSPECT ABS WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NGREPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
7CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± COMBINATION METER)
(a)Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

05±840
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
BRAKE WARNING LIGHT CIRCUIT
CIRCUIT DESCRIPTION
The Brake warning light comes on when the brake fluid is insufficient, the parking brake is applied or the EBD
is defective.
0543H±04