Infiniti FX35, FX50 (S51). Manual - part 257

C1111 ABS MOTOR, MOTOR RELAY SYSTEM

BRC-59

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit).

NO

>> Repair or replace error-detected parts.

Special Repair Requirement

INFOID:0000000005528308

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-9, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-

TRAL POSITION : Description"

.

>> END

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E41

1

Ground

Existed

4

BRC-60

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1114 ACTUATOR RELAY SYSTEM

C1114 ACTUATOR RELAY SYSTEM

Description

INFOID:0000000005234520

Activates or deactivates each solenoid valve according to the signals transmitted by the ABS actuator and
electric unit (control unit). 

DTC Logic

INFOID:0000000005234521

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

1.

Turn the ignition switch ON.

2.

Perform self-diagnosis for “ABS” with CONSULT-III.

Is DTC “C1114” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-60, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005234522

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect ABS actuator and electric unit (control unit) harness connector.

3.

Check terminal for deformation, disconnection, looseness, etc.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY GROUND CIRCUIT

Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.

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.

ABS actuator and electric unit (control unit)

—

Voltage

Connector

Terminal

E41

3

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E41

1

Ground

Existed

4

C1114 ACTUATOR RELAY SYSTEM

BRC-61

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit).

NO

>> Repair or replace error-detected parts.

Special Repair Requirement

INFOID:0000000005528309

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-9, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-

TRAL POSITION : Description"

.

>> END

BRC-62

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1115 WHEEL SENSOR

C1115 WHEEL SENSOR

Description

INFOID:0000000005234525

When the sensor rotor rotates, the magnetic field changes. Wheel sensor 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:0000000005234526

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

1.

Start the engine and drive the vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.

2.

Perform self-diagnosis for “ABS” with CONSULT-III.

Is DTC “C1115” detected?

YES

>> Proceed to diagnosis. Refer to 

BRC-62, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005234527

CAUTION:

Never check between wheel sensor terminals.

1.

CHECK TIRES

Check air pressure, wear and size. Refer to 

WT-80, "Tire Air Pressure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts. 

2.

CHECK SENSOR AND SENSOR ROTOR

• Check sensor rotor for damage. 
• Check wheel sensor for damage, disconnection or looseness.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair wheel sensor mount or replace sensor rotor. Then perform self-diagnosis for "ABS" with

CONSULT-III.

3.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect ABS actuator and electric unit (control unit) harness connector.

3.

Disconnect malfunctioning wheel sensor harness connector.

4.

Check terminal to see if it is deformed, disconnected, looseness, etc.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK WHEEL SENSOR HARNESS

1.

Check the continuity between ABS actuator and electric unit (control unit) harness connector and wheel
sensor harness connector. (Also check continuity when steering wheel is turned right and left and when
sensor harness inside the wheel house is moved.)

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)