2005 TOYOTA AVENSIS Circuit

± 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

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

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)

F45088GNDGNDIG1
±
DIAGNOSTICS ABS WITH EBD SYSTEM
05±733
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1300/62SKID CONTROL ECU MALFUNCTION
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1300/62Internal control unit of skid control ECU failure.
ECU
INSPECTION PROCEDURE
1RECONFIRM DTC
ADTC C1300/62
BExcept DTC C1300/62
BREPAIR CIRCUIT INDICATED BY OUTPUT
CODE
A
2INSPECT 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.
OK:
Voltage: 10 to 14 V
OKREPLACE BRAKE ACTUATOR ASSY (See page 32±54)
NG
0577W±04

05±730
± DIAGNOSTICSABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1249/58 STOP LIGHT SWITCH CIRCUIT
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1249/58
Stop light switch circuit is open, and stop light switch
voltage is in the level between 40 % and 70 % of the
battery voltage.
Stop light switch

Stop light switch circuit
050XZ±13

F45088GNDGNDSTP
05±732
±
DIAGNOSTICS ABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT STOP LAMP SWITCH ASSY
(a)Check that the stop light comes on when the brake pedal is depressed and goes\
off when the brake pedal is released.
NGGo to step 4
OK
2INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(STP TERMINAL)
(a)Disconnect skid control ECU connector.
(b)Measure the voltage between terminal STP and GND of the skid control ECU harness side connector when the
brake pedal is depressed.
OK:
Voltage: 10 to 14 V
OKREPLACE BRAKE ACTUATOR ASSY (See page 32±54)
NG
3 CHECK HARNESS AND CONNECTOR(STOP LIGHT SWITCH ± SKID CONTROL ECU)
(a) Check for an open or short circuit in harness and connector between the stop light switch and skid
control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±708)
4 CHECK HARNESS AND CONNECTOR(STOP LIGHT CIRCUIT)
(a)Check for an open or short circuit in harness and connector of the stop light\
circuit (See page 01±32). OK REPLACE STOP LAMP SWITCH ASSY
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

±
DIAGNOSTIC SABS WITH EBD & BA & TRC & VSC SYSTEM
05±807
AVENSIS RE PAIR MANUAL (RM1018E)
DT C C1237/3 7TIRE S OF DIFFERENT SIZE
CIRCUI T DESCRIPTION
DT C No.DTC Detecting ConditionTrouble Area
C1237/37
Detection of any of conditions from 1 through 4:
1. When the ignition switch is ON, the speed di fference
between max. and min. wheel speed is 5 % or more for
20 sec. at vehicle speed 20 km/h (12 mph)or more.
2 . When the ignition switch is ON, the slip di fference be
wheels at either side of vehicle 6 % or more (vehicle
speed: 100 km/h (62 mph) or more).
3 . Continuous ABS control for 60 seconds or more.
4 . Interference on 1 or more wheels for 20 seconds with
the brake pedal depressed, or for 5 seconds when the
brake pedal is not depressed.

Speed sensor

Senso rrotor
INSPECTIO N PROCEDURE
1 INSPEC T TIRE SIZE
N G REPLAC E TIRES SO TH AT ALL 4 TIRES ARE
SAM E IN SIZE
OK
2 INSPECT SPEED SENSOR RO TOR
(a ) Check the speed sensor rotors ( See page 05±774 or 05±778 ).
N G REPLACE SENSOR RO TOR
OK
3 INSPECT SPEED SENSOR
(a) Check the speed sensors ( See page 05±774 or 05±778 ).
N G REPLACE SPEED SENSOR
OK
4 CHECK HARNESS AND CONNEC TOR(SPEED SENSOR ± SKID CONTROL ECU)
(a ) Chec k for an open or short circuit in harness and connector between each terminal of the speed sensor
an d skid control ECU ( See page 01±32).
N G REPAIR OR REPLACE HARNESS OR
CONNEC TOR
OK
REPLAC E ABS & TRACTION ACTU ATOR ASSY( See page 32±57 )
05786±02