2005 TOYOTA AVENSIS Service Repair Manual

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Page 3985 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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

Page 3986 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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).
YE

Page 3987 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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 connect

Page 3988 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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 in

Page 3989 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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 Ro

Page 3990 of 5135

$TOYOTA AVENSIS 2005 Service Repair Manual 05±842 ± DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM AVENSIS REPAIR MANUAL (RM1018E) INSPECTION PROCEDURE HINT: Start the inspection from step 1 if you are using the hand±held tester and\ s$

Page 3991 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ±
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 circu

Page 3992 of 5135

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

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).

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