TOYOTA AVENSIS 2005 Service Repair Manual

C52361
Ts
CGDLC3
−
DIAGNOSTICS ABS WITH EBD SYSTEM
05−751
INSPECTION PROCEDURE
1 INSPECT DLC3 TERMINAL VOLTAGE(Ts TERMINAL)
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and CG of the
DLC3.
OK:
Voltage: 10 to 14 V
OK Go to step 3
NG
2 CHECK HARNESS AND CONNECTOR(DLC3 −BODY GROUND)
(a) Check for an open or short circuit in harness and connector between terminal Ts of the DLC3 and the
skid control ECU (See page 01− 32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
3 CHECK AND REPAIR HARNESS AND CONNECTOR(SKID CONTROL ECU −DLC3)
(a) Check for an open or short circuit in harness and connector between terminal CG of the DLC3 and body
ground (See page 01− 32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE BRAKE ACTUATOR ASSY(See page 32− 54)

F45136
Skid Control ECU
with Actuator
S225 D5
DLC3
TC
CG13
4
W±B (*1) W±L (*1)
AA BB
W±B (*2)J8
J/C
W±L (*1) W±L (*2)
W±B (*1) J16
J/C
IO IPCB3
CA6 DL15
DB17Driver Side J/B
Center J/B
W±B (*2)W±L
*1: LHD
*2: RHDTC 1AZ±FE:
C87490
Skid Control ECU
with Actuator
S225 D5 DLC3
TC
CG13
4
W±B (*1) W±L (*1)
AA BB
W±B (*2)J/C
W±L (*1) W±L (*2)
W±B (*1) J16
J/C
IP CB3
CA6 DL15
DB17Driver Side J/B
Center J/B
W±B (*2)W±L
*1: LHD
*2: RHDTC Except 1AZ±FE:
W±L (*2) B
J8
J/C D
J21 J20
IO: Gasoline
IL: 1CD±FTV
05±748
± DIAGNOSTICSABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
TC TERMINAL CIRCUIT
CIRCUIT DESCRIPTION
Connecting terminals Tc and CG of the DLC3 causes the ECU to display the DTC by flashing the ABS warn-
ing light.
WIRING DIAGRAM
05C5C±01

C52361
TcCGDLC3
±
DIAGNOSTICS ABS WITH EBD SYSTEM
05±749
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT DLC3 TERMINAL VOLTAGE(Tc TERMINAL)
(a)Turn the ignition switch ON.
(b)Measure the voltage between terminals Tc and CG of the
DLC3.
OK:
Voltage: 10 to 14 V
OKGo to step 3
NG
2CHECK HARNESS AND CONNECTOR(DLC3 ± BODY GROUND)
(a)Check for an open or short circuit in harness and connector between terminal \
CG of the DLC3 and body ground (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
3 CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± DLC3)
(a) Check for an open or short circuit in harness and connector between term\
inal Tc of the skid control ECU and the DLC3 (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE BRAKE ACTUATOR ASSY(See page 32±54)

05±744
± DIAGNOSTICSABS WITH EBD 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.
0577X±04

F45135
B±R
DH DA18 2Driver Side J/B
IGNEBDW S212
IE118 4
B±W
C11 C11Combination Meter
BrakeSkid Control ECU
with Actuator
P P 22
17
C10
AM2
4B 4A11IG2
A 1
2 AM2
3
IK 1A
Engine Room R/B No.3 Engine Room R/B No.1 & Engine Room J/B No.1
1
3 Engine Room J/B No.41
IO ILJ15
J/C
Battery
*1: Gasoline
*2: 1CD±FTV
*3: LHD
*4: RHD(*3) (*4) (*3) (*4)B±W CA CA
J8 J26 J8 J26J/C
B±R
IE4 IP111
(*3) (*4) B±R
B (*2)B±G (*1)
B (*2)
FL MAINB±G (*1)
W±B (*3 *2)
W±B (*3 *1)A A
AAJ17
J/C
J16
J/C W±B
(*3) W±B (*4)
W±B (*4)
I13
Ignition SW
46
± DIAGNOSTICSABS WITH EBD SYSTEM
05±745
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

05±746
±
DIAGNOSTICS ABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check the DTC (See page 05±699). OK:
Normal code
NGREPAIR CIRCUIT INDICATED BY OUTPUTCODE
OK
2INSPECT PARKING BRAKE SWITCH CIRCUIT
(a)Check for an open or short circuit in the parking brake switch circuit (See page 01±32). NGREPAIR OR REPLACE PARKING BRAKESWITCH CIRCUIT
OK
3INSPECT BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT
(a)Check the brake fluid level in reservoir.
(b)Check for an open or shot circuit in brake fluid level warning switch ci\
rcuit (See page 01±32). NG REPAIR OR REPLACE BRAKE FLUID LEVELWARNING SWITCH CIRCUIT
OK
4 INSPECT VACUUM WARNING SWITCH CIRCUIT
(a) Check for an open or short circuit in harness and connector between the vacuum warning switch and skid control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
5 INSPECT COMBINATION METER ASSEMBLY(BRAKE WARNING LIGHT CIRCUIT)
(a)Check for an open or short circuit in the combination meter (See page 01±32). NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK

±
DIAGNOSTICS ABS WITH EBD SYSTEM
05±747
AVENSIS REPAIR MANUAL (RM1018E)
6 CHECK HARNESS AND CONNECTOR(BRAKE ACTUATOR ± COMBINATION
METER)
(a) Check for an open or short circuit in harness and connector between the brake\
actuator and combina-
tion meter (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE BRAKE ACTUATOR ASSY(See page 32±54)

± DIAGNOSTICSABS WITH EBD SYSTEM
05±741
AVENSIS REPAIR MANUAL (RM1018E)
ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
CIRCUIT DESCRIPTION
If the ECU detects trouble, it will prohibit ABS control, turn on ABS warning light, and store the DTC.
Connect terminals Tc and CG of the DLC3 to make the ABS warning light blink and output the DTC.
056SW±09

F45135
B±R
DH DA18 2Driver Side J/B
IGNWA S222
IE117 9
B±W
C11 C10Combination Meter
ABSSkid Control ECU
with Actuator
R±Y R±Y 22
17
C10
AM2
4B 4A11IG2
A 1
2 AM2
3
IK 1A
Engine Room R/B No.3 Engine Room R/B No.1 & Engine Room J/B No.1
1
3 Engine Room J/B No.41
IO ILJ15
J/C
Battery
*1: Gasoline
*2: 1CD±FTV
*3: LHD
*4: RHD(*3) (*4) (*3) (*4)B±W CA CA
J8 J26 J8 J26J/C
B±R
IE4 IP111
(*3) (*4) B±R
B (*2)B±G (*1)
B (*2)
FL MAINB±G (*1)
W±B (*3 *2)
W±B (*3 *1)A A
AAJ17
J/C
J16
J/C W±B
(*3) W±B (*4) W±B (*4)
I13
Ignition SW
46 05±742
± DIAGNOSTICSABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

±
DIAGNOSTICS ABS WITH EBD SYSTEM
05±743
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(ABS WARNING LIGHT)
(a)Check that ºONº and ºOFFº of the ABS warning light is shown \
on the combination meter by the
hand±held tester.
OKREPLACE BRAKE ACTUATOR ASSY(See page 32±54)
NG
2INSPECT COMBINATION METER ASSY(ABS WARNING LIGHT) (See page 71±1)
(a)Disconnect the connector from the skid control ECU.
(b)Turn the ignition switch ON.
(c)Check the ABS warning light.
OK:
ABS warning light comes on
NGREPAIR OR REPLACE COMBINATION METERASSY
OK
3CHECK HARNESS AND CONNECTOR(WA CIRCUIT)
(a)Check for a short circuit in harness and connector between terminal WA of the skid control ECU and combination meter (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE BRAKE ACTUATOR ASSY(See page 32±54)