ABS TOYOTA AVENSIS 2005 Service Repair Manual

±
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)

± 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

F45148
IK IJ Battery
*1: Gasoline
*2: 1CD±FTV
*3: LHD
*4: RHDIL IOEA
S2
W±B W±B W±B W±B
(*4)
W±B (*3 *1)
W±B (*3 *2)
AA A A A J15
J/CJ17 J/C
J16 J/C
6 S210
GND2
GND1 ALT
4D
4B4A1
1
1
B±G
(*1)
1 21 21 2 123 5
ALTAM2
B±R
IE4 IP111
(*3) (*4)
1
ED1
33
3B±G (*1)
1A 1
Engine Room J/B No.4B (*2)
B±R
B±L (*2) W (*2)
FL MAIN
B (*2) B±G (*1)Engine Room R/B No.3 Engine Room R/B No.1 & Engine Room J/B No.1 G±Y B±R
B (*2)
1 3
6 4
AM2 AM1
IG1
IG2 I13 Ignition SW
G±RB±R
W±B
1
DH DA DB DH DA
DN
DH51 18 2
18
9 IG1 RelayDriver Side J/B
IGN
ECU±IG
AM1J10
(*3)G
J20C
(*4)J/C
J10
(*3)G
J20C
(*4)R±WR±W
IE1 22IG1 WA S2
S2 18 22
IE117 9
17 (*3) (*4) (*3) (*4)
1 B±W CA CA
J8 J26 J8 J26 C11 C10
C10 Combination Meter
ABSSkid Control ECU
with Actuator
R±Y R±Y 22 J/C
1
W±B (*4)
W±B (*3)
R±W
B±W
05±738
± DIAGNOSTICSABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

F45088GNDGNDIG1
±
DIAGNOSTICS ABS WITH EBD SYSTEM
05±739
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check the DTCs are output (See page 05±699).
YES REPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
2 INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
NO CONNECT CONNECTOR TO ECU
YES
3 INSPECT SKID CONTROL ECU CONNECTOR(IG1 TERMINAL VOLTAGE)
IN CASE OF 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.
IN CASE OF NOT USING HAND±HELD TESTER:
(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between terminals IG1 and GND ofthe skid control ECU harness side connector.
Voltage: 10 to 14 V
OK Go to step 5
NG

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)

F45132
Battery FL MAINSkid Control ECU
with Actuator
B±G (*1) L (*1)
1 ALT ABS Engine Room R/B No.4 & Engine Room J/B No.4
1
4B
W±BS2
S21 2
+BM
12
1 2
GND1 GND2
S24
W±BW±B
*1: Gasoline
*2: 1CD±FTVEA4
L (*2)
W (*2)
2 12 33 11B1ABS ALT Engine Room R/B No.3Engine Room R/B No.1 &
Engine Room J/B No.1
B (*2)
B±G (*1)
± DIAGNOSTICSABS WITH EBD SYSTEM
05±735
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1350/51 PUMP MOTOR IS LOCKED/OPEN CIRCUIT
IN PUMP MOTOR GROUND
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1350/51
When any of the following 1 through 3 is detected.
1. No motor voltage supply after skid control ECU starts
the motor relay.
2. A high level of motor voltage when skid control ECU
does not start the motor relay.
3. The pump motor voltage is high level for a certain time
after the motor relay has elapsed.
Brake actuator pump motor
WIRING DIAGRAM
05C5B±01

05±736
±
DIAGNOSTICS ABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check if other DTCs are detected (See page 05±699). YES REPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
REPLACE BRAKE ACTUATOR ASSY(See page 32±54)