2005 TOYOTA AVENSIS warning

± 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

±
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)

± DIAGNOSTICSABS WITH EBD SYSTEM
05±737
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.

Battery

Charging system

Power source circuit

ABS warning light circuit

Skid control ECU
HINT:
There is a case that hand±held tester cannot be used when there is a malfunction in the ECU.
056SV±09

F45088GNDGND
F45088GNDGNDWA
05±740
±
DIAGNOSTICS ABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4INSPECT SKID CONTROL ECU CONNECTOR(GND TERMINAL CONTINUITY)
(a)Measure resistance between terminal GND of the skid control ECU harness side connector and body ground.
Resistance: 1
or less
NGREPAIR OR REPLACE HARNESS OR CONNECTOR(GND TERMINAL ± BODY
GROUND)(See page 01±32)
OK
CHECK AND REPAIR HARNESS AND CONNECTOR(BATTERY ± IG1 TERMINAL)
(See page 01±32)
5INSPECT COMBINATION METER(ABS WARNING LIGHT)
(a)Disconnect the skid control ECU connector.
(b)Using service wire, connect terminals WA and GND of the skid control ECU harness side connector.
(c)Turn the ignition switch ON. OK:
ABS warning light goes off.
NGREPAIR OR REPLACE COMBINATION METER
OK
REPLACE BRAKE ACTUATOR ASSY(See page 32±54)

0542T±04
05±772
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still o\
ccurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the releva\
nt troubleshooting page.
NOTICE:
When replacing the ABS & TRACTION actuator, sensor or etc., turn the ignition switch to OFF.
SymptomSuspect AreaSee page
ABS does not operate
BA does not operate
EBD does not operate
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. IG power source circuit
3. Speed sensor circuit
4. Check the brake master cylinder with a ABS actuator checker or hand±held tester.
If there is malfunction, check the hydraulic circuit for leak-
age.
05±756
05±808
05±774
05±778 32±56
ABS does not operate properly
BA does not operate properly
EBD does not operate properly
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the brake master cylinder with a ABS actuator checker or hand±held tester.
If there is malfunction, check the hydraulic circuit for leak-
age.
05±756
05±774
05±778
05±815 32±56
ABS warning light malfunction1. ABS warning light circuit
2. ABS & TRACTION actuator05±827 ±
DTC of ABS check cannot be performed
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. Tc terminal circuit
05±756
05±852
Sensor signal check cannot be performed1. Ts terminal circuit
2. ABS & TRACTION actuator05±854 ±
TRC does not operate
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
05±756
05±808 ±
05±774
05±778

±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±773
AVENSIS REPAIR MANUAL (RM1018E) Symptom
Suspect AreaSee page
VSC does not operate
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal
code is output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
5. Yaw rate sensor and deceleration sensor circuit
6. Steering angle sensor circuit
05±756
05±808 ±
05±774
05±778
05±790
05±793
05±801
SLIP indicator light malfunction1. SLIP indicator light circuit
2. ABS & TRACTION actuator05±848 ±
TRC OFF indicator malfunction
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. TRC OFF switch circuit
05±756
05±844
DTC of VSC check cannot be performed
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. Tc terminal circuit
05±756
05±852
VSC warning light malfunction
If the symptoms still occur even after the following circuits
in suspect areas are inspected and proved to be normal,
replace the ABS & TRACTION actuator.
1. Check the DTC again and make sure that the normal code is output.
2. VSC warning circuit
05±756
05±831

0542S±04
C94401
05±770
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
WT (2) GND (6 10)LG B W BIG Switch ON, TRAC OFF Light ONBelow 2.0WT (2) ± GND (6, 10)LG±B ± W±BIG Switch ON, TRAC OFF Light OFF10 to 14
IND (4) GND (6 10)LG W BIG Switch ON, SLIP indicator light ONBelow 2.0IND (4) ± GND (6, 10)LG ± W±BIG Switch ON, SLIP indicator light OFF10 to 14
+BS (5) ± GND (6, 10)R ± W±BAlways10 to 14
ENG+ (8) ± ENG± (7)Y ± BIG switch ONPulse generation
+BM (9) ± GND (6, 10)L ± W±BAlways10 to 14
PMC (11) ± E2 (12)GR ± Y±RIG switch ON, stop light switch OFF0.3 to 0.9
SS1 (13) ± SS2 (29)W ± BEngine idling, slowly tun steering wheelPulse generation
IG1 (14) ± GND (6, 10)R±W ± W±BIG switch ON10 to 14
BZ (15) GND (6 10)BY WBIG switch ON, VSC buzzer is soundedBelow 1.0 10 to 14BZ (15) ± GND (6, 10)B±Y ± W±BIG switch ON, VSC buzzer is not sounded10 to 14
Tc (17) ± GND (6, 10)W±L ± W±BIG Switch ON10 to 14
TRC+ (18) ± TRC± (19)G ± LIG switch ONPulse generation
EBDW (20) GND (6 10)PWBIG Switch ON, Brake warning light ON5 to 9EBDW (20) ± GND (6, 10)P ± W±BIG Switch ON, Brake warning light OFFBelow 2.0
FR+ (21) ± FR± (22)W ± BIG switch ON, slowly turn right front wheelAC generation
RL+ (23) ± RL± (40)R ± GIG switch ON, slowly turn left rear wheelAC generation
D/G (26) ± GND (6, 10)W±G ± W±BIG switch ON8 to 12
VCM (27) ± GND (6, 10)Y±G ± W±BIG switch ON4.5 to 5.5
Ts (28) ± GND (6, 10)W ± W±BIG switch ON10 to 14
YIGA (30) ± YGND (16)W±L ± W±GIG Switch ON10 to 14
PKB (31) GND (6 10)BW WBIG switch ON, parking brake switch ONBelow 1.5PKB (31) ± GND (6, 10)B±W ± W±BIG switch ON, parking brake switch OFF10 to 14
NEO (32) ± GND (6, 10)Y±B ± W±BEngine idlingPulse generation
VSCW (34) GND (6 10)WR WBIG Switch ON, VSC warning light ON5 to 9VSCW (34) ± GND (6, 10)W±R ± W±BIG Switch ON, VSC warning light OFFBelow 2.0
SP1 (35) ± GND (6, 10)L±W ± W±BVehicle drives at about 20 km/h (12 mph)Pulse generation
WA (36) GND (6 10)RY WBIG Switch ON, ABS warning light ONBelow 2.0WA (36) ± GND (6, 10)R±Y ± W±BIG Switch ON, ABS warning light OFF10 to 14
STP (37) GND (6 10)GW WBStop light switch OFFBelow 1.5STP (37) ± GND (6, 10)G±W ± W±BStop light switch ON8 to 14
RR+ (38) ± RR± (39)P ± VIG switch ON, slowly turn right rear wheelAC generation
FL+ (41) ± FL± (24)L±Y ± R±LIG switch ON, slowly turn left front wheelAC generation

05C8R±02
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))05±863
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1.DIAGNOSIS SYSTEM
(a)Description for Euro±OBD
(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±876).
(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 light up for
a malfunction that is only detected once or momen-
tarily (Hand±held tester only) (See step 2).