2005 TOYOTA AVENSIS Circuit

C94397
GND
IG1
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±819
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1300/62SKID CONTROL ECU MALFUNCTION
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1300/62
1.Skid control ECU continuously detects the continuous
operation of ABS at all 4 wheels for max. 1.28 sec.
2.Continuos VSC operation for 10 sec. or more.
3.Internal malfunction in ECU.

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)
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
05789±02

05±818
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1288/88ECU VERSION MISS MATCHI
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1288/88
When either of the following 1 or 2 is detected:
1.ECM does not match.
2.Steering angle sensor is not calibrated.
ECM

Steering angle sensor calibration.
INSPECTION PROCEDURE
1PERFORM STEERING ANGLE SENSOR ZERO POINT CALIBRATION
(a)Perform the steering angle sensor zero point calibration (See page 05±756).
2 RECONFIRM DTC
(a) Check if the same DTC is stored in the memory.
NO END
YES
3 CHECK HARNESS AND CONNECTOR(STEERING ANGLE SENSOR ± SKID CONTROL ECU)
(a) Check for an open or short circuit in harness and connector between the \
steering angle sensor and
skid control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)
05788±02

± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
05±815
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1249/58 STOP LIGHT SWITCH CIRCUIT
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1249/58
After the ignition switch is turned ON, the condition that the
STP terminal voltage of ECU is 40 % to 67 % of supplied
voltage, continues for 1 second or more.
Stop light switch circuit
05439±04

C94397STP
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±817
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 the skid control ECU connector.
(b)Measure the voltage between terminal STP of the skid control ECU harness side connector and body ground
when the brake pedal is depressed.
OK:
Voltage: 8 to 14 V
OKREPLACE ABS & TRACTION ACTUATOR ASSY (See page 32±57)
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
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

F45141
Skid Control ECU
with Actuator
12
S1
VCM 11
PMC
27E2
S1
S1
STP 37
S1
Battery FL MAIN O1
Oil Pressure Sensor
1
Y±G
1
4B
1
2 2
*1: 1AZ±FSE
*2: 1CD±FTV3
12 33ALT Engine Room R/B No.3
B (*2)
B±G (*1)1
4D Engine Room J/B No.4B±G (*1)
B±L (*2) W (*2) R±W (*3)1 2Y±R
GR
R±W (*4)R±W (*3)
R±W (*4)
11 1 2 2
22DL DA
DA DNDM IR1
6
IE3
11
IE3
2
IR1
ED1 1Driver Side J/B
S13 Stop Light SW
G±W (*3)G±W (*3)G±W (*4) G±W (*4) G±W
To
Stop
Light
B±G (*1)
STOP
*3: LHD
*4: RHDALT 05±812
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1246/53 MALFUNCTION IN MASTER CYLINDER
PRESSURE SENSOR
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1246/53
When any of the following 1 through 3 is detected:
1. The voltage of sensor signal is out of range (less than
0.3 V, more than 4.7 V).
2. The sensor supply voltage is out of range (above 5.6 V,
below 4.4 V).
3. The sensor signal offset value is out of range.
4. Gradient of sensor signal is not within allowed range.

Master cylinder pressure sensor

Master cylinder pressure sensor circuit
WIRING DIAGRAM
05787±02

±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±813
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.
1READ VALUE OF MASTER CYLINDER PRESSURE SENSOR
(a)Select the DATALIST mode on the hand±held tester.
(b)Check that the brake fluid pressure value of the No.1 master cylinder pressur\
e sensor and No.2 master
cylinder pressure sensor displayed on the hand±held tester changes wh\
en depressing the brake ped-
al.
OK:
Brake fluid pressure value is changing.
OKGo to step 4
NG
2INSPECT 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.
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
3CHECK HARNESS AND CONNECTOR(MASTER CYLINDER PRESSUR SENSOR ± SKID CONTROL ECU)
(a)Check for an open or short circuit in harness and connector between terminal \
of the master cylinder
pressure sensor and skid control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK

05±808
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE OR
ABNORMALLY HIGH BATTERY POSITIVE
VOLTAGE
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1241/41
Low battery voltage is less than 9.8 V at the time of non±
operation of ABS control or less than 9.4 V at the time of
operation of ABS control, or battery voltage is more than
17.4 V.
Battery

IC regulator

Power source circuit
05436±04

F45090
Driver Side J/BECU±IG
C94397
GND
IG1
05±810
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT FUSE(ECU±IG FUSE)
(a)Remove the ECU±IG fuse from the driver side J/B.
(b)Check continuity of the ECU±IG fuse. OK:
Continuity
NGINSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED
TO ECU±IG FUSE
OK
2INSPECT BATTERY
OK:
Voltage: 10 to 14 V NGINSPECT CHARGING SYSTEM
OK
3INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(IG1 TERMINAL)
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 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