Page 3985 of 5135
F45140
12 33ALT Engine Room R/B No.3
W±B (*3, *2)2 18
DH DADriver Side J/B
IG1 1
4B
1
2 B±G (*1)
4D Engine Room J/B No.4
1
4AB±G (*1) B±L (*2)
ALTSkid Control ECU
with Actuator
14
S1 IG1
36
S1
WA 3
12
Engine Room R/B No.1 & Engine Room J/B No.11 18
D8
DN Driver Side J/B
IG1 Relay ECU±IG
35
*1: 1AZ±FSE
*2: 1CD±FTV*3: LHD
*4: RHDB±RI13
Ignition SW
6 4AM2 IG2 R±W R±W R±WJ/C
J10 J20 J10 J20GC GC 22
IE1
(*3) (*4) (*3) (*4)
B±G (*1)
AM2 1
1 1A
Battery FL MAINW±B (*3)
W±B (*4)
W±B
(*3, *1)
W±B W±B
W±B J16 J/C
IL IO IK EAS110
GND1 GND2
S16 J15
J/C IE4 IP111
(*3) (*4) J/C
J8 J26 J8 J26CA CA
(*3) (*4) (*3) (*4) B±W B±W22
C1117
C109
C10
ABS Combination Meter B (*2) B (*2)
W (*2)
ED11
IE117
J17 J/C
W±B (*4)
W±B (*4)
W±B (*3)
B±R R±Y
R±Y
B±R
AA1
AAA 05±828
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
Page 3986 of 5135
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
Page 3987 of 5135
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)
Page 3988 of 5135
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
Page 3989 of 5135
F45135
B±R
DH DA18 2Driver Side J/B
IGNEBDW S120
IE118 4
B±W
C11 C11Combination Meter
BrakeSkid Control ECU
with Actuator
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: 1AZ±FSE
*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
46P
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
05±841
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
Page 3990 of 5135
05±842
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
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(BRAKE WARNING LIGHT)
(a)Check that ºONº and ºOFFº of the Brake warning light is shown on \
the combination meter by the hand± held tester.
OKGo to step 4
NG
2CHECK DTC FOR ABS
(a)Check the DTC on page 05±756. YES REPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
3 INSPECT BRAKE WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
4INSPECT PARKING BRAKE SWITCH ASSY(See page 71±3)
NG REPLACE PARKING BRAKE SWITCH ASSY
OK
5INSPECT BRAKE FLUID LEVEL WARNING SWITCH(See page 71±3)
NG REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB±ASSY
OK
Page 3991 of 5135
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±843
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± PARKING BRAKE
SWITCH)
(a)Check for an open or short circuit in harness and connector between terminal \
PKB of the skid control
ECU and parking brake switch (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
7CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± BRAKE FLUID LEVEL WARNING SWITCH)
(a)Check for an open or short circuit in harness and connector between terminal \
EBDW of the skid control
ECU and brake fluid level warning switch (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
8CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± COMBINATION MERTER)
(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)
Page 3992 of 5135
05±985
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1.DIAGNOSIS SYSTEM
(a)Description
(1)When troubleshooting Euro±OBD TOYOTA AVENSIS 2005 Service Repair Manual 05C8E±01
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)05±985
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1.DIAGNOSIS SYSTEM
(a)Description
(1)When troubleshooting Euro±OBD](/manual-img/14/57441/w960_57441-3991.png)
05C8E±01
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)05±985
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1.DIAGNOSIS SYSTEM
(a)Description
(1)When troubleshooting Euro±OBD vehicles, theonly difference from the usual troubleshooting pro-
cedure is that you connect the vehicle to the OBD
scan tool complying with ISO 15031±4 or hand±
held tester, and read off various data output from
the vehicle's ECM.
(2)Euro±OBD regulations require that the vehicle's on±board computer illuminates the Check Engine
Warning Light (Malfunction Indicator Lamp)/CHK
ENG (MIL) on the instrument panel when the com-
puter detects a malfunction in the emission control
system/components or in the driving system com-
ponents which affect vehicle emissions, or a mal-
function in the computer. In addition to CHK ENG
(MIL) illuminating when a malfunction is detected,
the applicable Diagnostic Trouble Codes (DTCs)
prescribed by ISO15031±6 are recorded in the
ECM memory.
If the malfunction does not occur in 3±trip, the CHK ENG (MIL)
goes off but the DTCs remain recorded in the ECM memory. (3)To check the DTCs, connect the OBD scan tool orhand±held tester to the Data Link Connector 3
(DLC3) on the vehicle. The OBD scan tool or hand±
held tester also enables you to erase the DTCs and
check freezed frame data and various forms of en-
gine data (For operating instructions, see the OBD
scan tool's instruction book.).
(4)DTCs include ISO controlled codes and manufac- turer controlled codes. ISO controlled codes must
be set as prescribed by the ISO, while manufacturer
controlled codes can be set freely by the manufac-
turer within the prescribed limits (See DTC chart on
page 05±996).
(5) The diagnosis system operates in normal mode during normal vehicle use. It also has a check mode
for technicians to simulate malfunction symptoms
and troubleshoot. Most DTCs use 2 trip detection
logic (*) to prevent erroneous detection, and ensure
thorough malfunction detection. By switching the
ECM to check mode when troubleshooting, techni-
cians can cause the CHK ENG (MIL) to illuminate
for a malfunction that is only detected once or mo-
mentarily (Hand±held tester only) (See step 2).