Toyota Corolla (2004+). Manual - part 38
05-329
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
INSPECTION PROCEDURE
1
INSPECT STOP LAMP SWITCH ASSY
(a) Check that the stop light lights up when brake pedal is depressed and turns OFF when the brake pedal
is released.
NG Go to step 4
OK
2
INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(STP TERMINAL)
(a) Disconnect skid control ECU connector.
STP (+)
GND1 (-)
(b) Measure voltage between terminal STP (16) and GND (1,
23) of skid control ECU harness side connector when the
brake pedal is depressed.
Voltage: 10 - 14 V
GND2(-)
C58919
OK CHECK AND REPLACE BRAKE ACTUATOR
ASSY
NG
3
CHECK HARNESS AND CONNECTOR(STOP LIGHT SWITCH - SKID CONTROL
ECU)
(a) Check for open and short circuit in harness and connector between stop light switch and skid control
ECU (See page 01-30).
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
4
CHECK HARNESS AND CONNECTOR(STOP LIGHT CIRCUIT)
(a) Check for open and short circuit in harness and connector of the stop light circuit (See page
01-30 ).
OK REPLACE STOP LAMP SWITCH ASSY
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
05-330
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UL-04
DTC
C1251/51
PUMP MOTOR IS LOCKED/OPEN CIRCUIT
IN PUMP MOTOR GROUND
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
ABS actuator pump motor is not operating normally during
C1251/51
ABS pump motor
initial check.
WIRING DIAGRAM
Skid Control ECU with Actuator
Engine Room R/B and J/B
1
ALT ABS No.2
24
B
L
1A
1
S1
+BM
1
21
2
1
W-B
S1
GND1
23
W-B
S1
GND2
FL MAIN
W-B
Battery
EA
C96169
05-331
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using hand-held tester.
1
INSPECT BRAKE ACTUATOR ASSY
(a) Select the DATALIST mode on the hand-held tester.
(b) Check the operation sound of the ABS pump motor when operating it with the hand-held tester.
OK:
The operation sound of the ABS pump motor should be heard.
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2
INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(+BM TERMINAL VOLTAGE)
(a) Disconnect the skid control ECU connector.
(b) Measure the voltage between terminal +BM (24) and
GND (23) of skid control ECU harness side connector.
OK:
The operation sound of the ABS pump motor should
be heard.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
GND2 (-) +BM (+)
C58919
OK
REPLACE BRAKE ACTUATOR ASSY
05-316
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UG-04
DTC
C0226/21
SFR SOLENOID CIRCUIT
DTC
C0236/22
SFL SOLENOID CIRCUIT
DTC
C0246/23
SRR SOLENOID CIRCUIT
DTC
C0256/24
SRL SOLENOID CIRCUIT
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders thus controlling the braking force.
DTC No.
DTC Detecting Condition
Trouble Area
Detection of any condition in 1. and 2.:
C0226/21
1. With IG1 terminal voltage at 10V - 16V, solenoid circuit
C0236/22
F Each solenoid circuit
is open or short circuit for 0.05 sec. or longer.
C0246/23
F Brake actuator
2. With IG1 terminal voltage at 10V - 16V, during ABS con-
C0256/24
trol solenoid relay contact is OFF for 0.05 sec. or longer.
WIRING DIAGRAM
Skid Control ECU with Actuator
Engine Room R/B and J/B
1
ALT ABS No.1
2
B
R
1A
1
S1
+BS
1
21
2
1
W-B
S1
GND1
23
W-B
S1
GND2
FL MAIN
W-B
Battery
EA
C96169
05-317
DIAGNOSTICS
-
ABS WITH EBD SYSTEM (April, 2003)
INSPECTION PROCEDURE
1
RECONFIRM DTC
(a) Check if the other DTCs are recorded (See page 05-297).
YES REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
NO
REPLACE BRAKE ACTUATOR ASSY
05-318
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UH-02
DTC
C0273/13
OPEN CIRCUIT IN ABS MOTOR RELAY
CIRCUIT
DTC
C0274/14
B+ SHORT CIRCUIT IN ABS MOTOR RELAY
CIRCUIT
CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU switches
the motor relay ON and operates the ABS pump motor.
DTC No.
DTC Detecting Condition
Trouble Area
With IG1 voltage 10V or below during initial check or ABS
C0273/13
control, pump motor relay is turned ON, and relay contact is
F ABS motor relay
not ON for 0.2 sec. or longer.
F ABS motor relay circuit
When pump motor relay is turned OFF, relay contact is ON
C0274/14
for 3 sec. or longer.
WIRING DIAGRAM
Skid Control ECU with Actuator
Engine Room R/B and J/B
1
ALT ABS No.2
24
B
L
1A
1
S1
+BM
1
21
2
1
W-B
S1
GND1
23
W-B
S1
GND2
FL MAIN
W-B
Battery
EA
C96169
05-319
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
1
PERFORM ACTIVE TEST BY HAND-HELD TESTER(ABS MOTOR RELAY)
(a) Check the operation sound of the ABS motor individually when operaing it with the hand-held tester.
OK:
The operation sound of the ABS motor should be heard.
OK CHECK AND REPLACE BRAKE ACTUATOR
ASSY
NG
2
INSPECT SKID CONTROL ECU CONNECTOR(+BM TERMINAL VOLTAGE)
(a) Disconnect the skid control ECU connector.
GND1(-)
(b) Measure the voltage between terminals +BM (24) and
GND (1, 23) of skid control ECU harness side connector.
Voltage: 10 - 14 V
OK CHECK AND REPLACE BRAKE ACTUATOR
GND2(-)
+BM (+)
C58919
ASSY
NG
05-320
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
3
INSPECT FUSE(ABS No.2 FUSE)
(a) Remove ABS No.2 fuse from the engine room R/B.
Engine Room R/B
(b) Check continuity of ABS No.2 fuse.
OK:
Continuity
ABS No.2
I32647
NG REPLACE INSPECT FOR SHORT CIRCUIT IN
ALL HARNESS AND COMPONENTS
CONNECTED TO ABS NO. 2 FUSE
OK
4
INSPECT SKID CONTROL ECU CONNECTOR(GND TERMINAL CONTINUITY)
(a) Measure resistance between terminal GND (1,23) of skid
GND1
control ECU harness side connector and body ground.
Resistance: 1
W or less
GND2
C58919
NG CHECK AND REPAIR HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE BRAKE ACTUATOR ASSY (See page
05-306)
05-321
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UI-04
DTC
C0278/11
OPEN CIRCUIT IN ABS SOLENOID RELAY
CIRCUIT
DTC
C0279/12
SHORT CIRCUIT IN ABS SOLENOID RELAY
CIRCUIT
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.
DTC Detecting Condition
Trouble Area
When solenoid relay is turned ON, relay contact is OFF for
C0278/11
0.2 sec. or longer.
F ABS solenoid relay
Immediately after IG1 is turned ON, when solenoid relay is
F ABS solenoid relay circuit
C0279/12
turned OFF, relay contact is ON for 0.2 sec. or longer.
WIRING DIAGRAM
Skid Control ECU with Actuator
Engine Room R/B and J/B
1
ALT ABS No.1
2
B
R
1A
1
S1
+BS
1
21
2
1
W-B
S1
GND1
23
W-B
S1
GND2
FL MAIN
W-B
Battery
EA
C96169
05-322
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
INSPECTION PROCEDURE
1
INSPECT SKID CONTROL ECU CONNECTOR(+BS TERMINAL VOLTAGE)
(a) Disconnect the skid control ECU connector.
GND1(-)
+BS (+)
(b) Measure the voltage between terminals +BS (2) and GND
(1, 23) of skid control ECU harness side connector.
Voltage: 10 - 14 V
GND2(-)
C58919
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR (+BM CIRCUIT)
OK
2
RECONFIRM DTC
(a) Check the DTC (See page 05-297).
OK :
Normal code
NG END
OK
05-323
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
3
INSPECT CONTACT CONDITION
(a) Inspect the condition of the each connector from engine
Engine Room R/B
room R/B to skid control ECU.
ABS No.1
I32647
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE BRAKE ACTUATOR ASSY (See page
05-306)
05-296
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057U8-04
CUSTOMER PROBLEM ANALYSIS CHECK
ABS Check Sheet
Inspector’s
:
Name
Registration No.
Registration Date
/
/
Customer’s Name
Frame No.
Date Vehicle
km
/
/
Odometer Reading
Brought In
miles
Date Problem First Occurred
/
/
Frequency the Problem Occurs
Continuously
Intermittently (
times a day)
ABS does not operate.
ABS does not operate efficiently.
Symptoms
ABS Warning Light
Remains ON
Does not Light Up
Abnormal
Brake Warning
Remains ON
Does not Light Up
Light Abnormal
1st Time
Normal Code
Malfunction Code (Code
)
DTC Check
2nd Time
Normal Code
Malfunction Code (Code
)
STOP LIGHT SW
ON
OFF
NO SYS
ABS
SYSTEM
Freeze Frame Data
FAIL SF
#IG ON
MPH
VEHICLE SPD
km/h
05-303
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UA-04
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch to OFF.
HINT:
F
Using SST 09843-18040, it connect the terminal Tc and CG of DLC3.
F
If any abnormality is not found when inspecting parts, inspect the ECU and ground points for poor con-
tact.
F
If a malfunction code is displayed during the DTC check, check the circuit listed that code. For details
of each code, turn to the page referred to under the ”See page” for respective ”DTC No.” in the DTC
chart.
F
When 2 or more DTC’s are recorded, and the problem is not identified, perform circuit inspection of
the other DTC’s.
DTC No.
Detection Item
Trouble Area
(See Page)
F Right front speed sensor
C0200/31
Right front wheel speed sensor signal malfunction
F Right front speed sensor circuit
(05-308)
F Right front speed sensor rotor
F Left front speed sensor
C0205/32
Left front wheel speed sensor signal malfunction
F Left front speed sensor circuit
(05-308)
F Left front speed sensor rotor
F Right rear speed sensor
C0210/33
Right rear wheel speed sensor signal malfunction
F Right rear speed sensor circuit
(05-312)
F Right rear speed sensor rotor
F Left rear speed sensor
C0215/34
Left rear wheel speed sensor signal malfunction
F Left rear speed sensor circuit
(05-312)
F Left rear speed sensor rotor
C0226/21
F Brake actuator
Open or short circuit in ABS actuator solenoid (SFR) circuit
(05-316)
F SFRR or SFRH circuit
C0236/22
F Brake actuator
Open or short circuit in ABS actuator solenoid (SFL) circuit
(05-316)
F SFLR or SFLH circuit
C0246/23
F Brake actuator
Open or short circuit in ABS actuator solenoid (SRR) circuit
(05-316)
F SRRR or SRRH circuit
C0256/24
F Brake actuator
Open or short circuit in ABS actuator solenoid (SRL) circuit
(05-316)
F SRLR or SRLH circuit
C0273/13
Open circuit in ABS motor relay circuit
(05-318)
F ABS motor relay
C0274/14
F ABS motor relay circuit
Short circuit in ABS motor relay circuit
(05-318)
C0278/11
Open circuit in ABS solenoid relay circuit
(05-321)
F ABS solenoid relay
C0279/12
F ABS solenoid relay circuit
Short circuit in ABS solenoid relay circuit
(05-321)
C1235/35
F Right front speed sensor
Foreign matter is attached on the tip of right front sensor
(05-308)
F Right front speed sensor rotor
C1236/36
F Left front speed sensor
Foreign matter is attached on the tip of left front sensor
(05-308)
F Left front speed sensor rotor
C1238/38
F Right rear speed sensor
Foreign matter is attached on the tip of right rear sensor
(05-312)
F Right rear speed sensor rotor
C1239/39
F Left rear speed sensor
Foreign matter is attached on the tip of left rear sensor
(05-312)
F Left rear speed sensor rotor
F Battery
C1241/41
Low battery voltage or abnormally high battery voltage
F Charging system
(05-324)
F Power source circuit
C1249/49
F Stop light switch
Open circuit in stop light switch circuit
(05-327)
F Stop light switch circuit
05-304
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
C1251/51
Pump motor is locked
F ABS pump motor
(05-330)
Open circuit in pump motor circuit
F Battery
Always ON
F Charging system
Malfunction in skid control ECU
(05-332)
F Power source circuit
F Skid control ECU
DTC of speed sensor check function:
Code No.
Diagnosis
Trouble Area
F Right front speed sensor
C1271/71
Low output voltage of right front speed sensor
F Sensor installation
F Sensor rotor
F Left front speed sensor
C1272/72
Low output voltage of left front speed sensor
F Sensor installation
F Sensor rotor
F Right rear speed sensor
C1273/73
Low output voltage of right rear speed sensor
F Sensor installation
F Sensor rotor
F Left rear speed sensor
C1274/74
Low output voltage of left rear speed sensor
F Sensor installation
F Sensor rotor
C1275/75
Abnormal change in output voltage of right front speed sensor
Right front speed sensor rotor
C1276/76
Abnormal change in output voltage of left front speed sensor
Left front speed sensor rotor
C1277/77
Abnormal change in output voltage of right rear speed sensor
Right rear speed sensor rotor
C1278/78
Abnormal change in output voltage of left rear speed sensor
Left rear speed sensor rotor
05-308
DIAGNOSTICS
- ABS WITH EBD SYSTEM (April, 2003)
057UE-04
DTC
C0200/31
RIGHT FRONT SPEED SENSOR CIRCUIT
DTC
C0205/32
LEFT FRONT SPEED SENSOR CIRCUIT
DTC
C1235/35
FOREIGN MATTER IS ATTACHED ON TIP OF
RIGHT FRONT SENSOR
DTC
C1236/36
FOREIGN MATTER IS ATTACHED ON TIP OF
LEFT FRONT SENSOR
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and transmits the ap-
propriate signals to the ECU. These signals are used for control
Speed Sensor
of the ABS control system. Each of the front and rear rotors has
Rotor
N S
Magnet
Coil
48 serrations.
To ECU
When the rotors rotate, the magnetic field generated by the per-
manent magnet in the speed sensor induces an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
Low Speed
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
High Speed
+V
BR3583
-V
BR3582
F00010
DTC No.
DTC Detecting Condition
Trouble Area
Detection of any of conditions 1. through 3.:
1. At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 15 sec.
F Right front and left front speed sensor
C0200/31
2. Momentary interruption of the speed sensor signal oc-
F Each speed sensor circuit
C0205/32
curs at least 7 times in the time between switching the
F Speed sensor rotor
ignition switch ON and switching it OFF.
3. The condition that the speed sensor signal circuit is
open continues for 0.5 sec. or more.
At the vehicle speed of 20 km/h (12 mph) or more, the
C1235/35
F Right front and left front speed sensor
condition that noise is included in the speed sensor signal
C1236/36
F Speed sensor rotor
continues for 5 sec. or more.
HINT:
DTC No. C0200/31 and C1235/35 is the right front speed sensor.
DTC No. C0205/32 and C1236/36 is the left front speed sensor.