Infiniti G37 Coupe. Manual — part 267
BRC-42
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1114 ACTUATOR RELAY SYSTEM
C1114 ACTUATOR RELAY SYSTEM
Description
INFOID:0000000001635062
Activates or deactivates each solenoid valve according to the signals transmitted by the ABS actuator and
electric unit (control unit).
DTC Logic
INFOID:0000000001635063
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001635064
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) connector.
3.
Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
4.
Reconnect connectors and then perform the self-diagnosis.
Is any item indicated on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> Poor connection of connector terminal. Repair or replace connector.
2.
CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) connector.
3.
Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and
ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning components.
3.
CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACUATOR RELAY GROUND CIRCUIT
DTC
Display item
Malfunction detected condition
Possible cause
C1114
MAIN RELAY
During the actuator relay operating with OFF, when the
actuator relay turns ON, or when the control line for the
relay is shorted to the ground.
• Harness or connector
• ABS actuator and electric unit
(control unit)
During the actuator relay operating with ON, when the
actuator relay turns ON, or when the control line for the
relay is open.
Self-diagnosis results
MAIN RELAY
ABS actuator and electric unit (control unit)
—
Voltage
Connector
Terminal
E41
3
Ground
Battery voltage
C1114 ACTUATOR RELAY SYSTEM
BRC-43
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and
ground.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit).
NO
>> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000001664572
1.
CHECK ACTIVE TEST
1.
On “ACTIVE TEST”, select “ABS MOTOR”.
2.
Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table
below.
NOTE:
A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is
an operation for checking.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to diagnosis procedure. Refer to
Special Repair Requirement
INFOID:0000000001635066
1.
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actua-
tor and electric unit (control unit). Refer to
BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-
>> END
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E41
1, 4
Ground
Existed
Test item
Display item
Display
On
Off
ABS MOTOR
MOTOR RELAY
On
Off
ACTUATOR RLY (Note)
On
On
BRC-44
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1115 WHEEL SENSOR
C1115 WHEEL SENSOR
Description
INFOID:0000000001664566
When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current
signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635068
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001665620
CAUTION:
Do not check between wheel sensor terminals.
1.
CHECK TIRES
Check air pressure, wear and size.
Are air pressure, wear and size within standard?
YES
>> GO TO 2.
NO
>> Adjust air pressure, or replace tire.
2.
CHECK SENSOR AND SENSOR ROTOR
• Check sensor rotor for damage.
• Check wheel sensor for damage, disconnection or looseness.
Are the sensor and sensor rotor normal?
YES
>> GO TO 3.
NO
>> Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.
3.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) connector.
3.
Disconnect malfunctioning wheel sensor connector.
4.
Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction
condition is found.
5.
Reconnect connectors and then perform the self-diagnosis.
Is any item indicated on the self-diagnosis display?
YES
>> GO TO 4.
NO
>> Poor connection of connector terminal. Repair or replace connector.
4.
CHECK WHEEL SENSOR HARNESS
DTC
Display item
Malfunction detected condition
Possible cause
C1115
ABS SENSOR
[ABNORMAL SIGNAL]
When wheel sensor input signal is malfunctioning.
• Harness or connector
• Wheel sensor
• ABS actuator and electric unit
(control unit)
Self-diagnosis results
ABS SENSOR [ABNORMAL SIGNAL]
C1115 WHEEL SENSOR
BRC-45
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) connector.
3.
Disconnect malfunctioning wheel sensor connector.
4.
Check continuity between terminals. (Also check continuity when steering wheel is turned right and left
and when sensor harness inside the wheel house is moved.)
Measurement terminal for power supply circuit
Measurement terminal for signal circuit
Measurement terminal for ground circuit
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning components.
5.
CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect malfunctioning wheel sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between wheel sensor harness connector power supply terminal and ground.
Is the inspection result normal?
YES
>> Replace applicable wheel sensor.
NO
>> Replace ABS actuator and electric unit (control unit).
Component Inspection
INFOID:0000000001665621
1.
CHECK DATA MONITOR
ABS actuator and electric unit (control unit)
Wheel sensor
Continuity
Connector
Terminal
Connector
Terminal
E41
9
E27 (Front RH)
1
Existed
26
E60 (Front LH)
7
B33 (Rear RH)
6
B34 (Rear LH)
ABS actuator and electric unit (control unit)
Wheel sensor
Continuity
Connector
Terminal
Connector
Terminal
E41
10
E27 (Front RH)
2
Existed
5
E60 (Front LH)
29
B33 (Rear RH)
27
B34 (Rear LH)
ABS actuator and electric unit (control unit)
Continuity
Connector
Terminal
Connector
Terminal
E41
9, 10
E41
1, 4
Not existed
26, 5
7, 29
6, 27
Wheel sensor
—
Voltage
Connector
Terminal
E27 (Front RH)
1
Ground
8 V or more
E60 (Front LH)
B33 (Rear RH)
B34 (Rear LH)
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