Infiniti G37 Coupe. Manual - part 265

 

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Infiniti G37 Coupe. Manual - part 265

 

 

BRC-34

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1105, C1106, C1107, C1108 WHEEL SENSOR-2

C1105, C1106, C1107, C1108 WHEEL SENSOR-2

Description

INFOID:0000000001665608

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:0000000001635046

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 

BRC-34, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001665605

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?

DTC

Display item

Malfunction detected condition

Possible cause

C1105

RR RH SENSOR-2

When the circuit in the rear RH wheel sensor is short-cir-
cuited. Or when the distance between the wheel sensor 
and sensor rotor is too large and the sensor pulse cannot 
be recognized by the control unit.

• Harness or connector
• Wheel sensor
• ABS actuator and electric unit 

(control unit)

C1106

RR LH SENSOR-2

When the circuit in the rear LH wheel sensor is short-cir-
cuited. Or when the distance between the wheel sensor 
and sensor rotor is too large and the sensor pulse cannot 
be recognized by the control unit.

C1107

FR RH SENSOR-2

When the circuit in the front RH wheel sensor is short-cir-
cuited. Or when the distance between the wheel sensor 
and sensor rotor is too large and the sensor pulse cannot 
be recognized by the control unit.

C1108

FR LH SENSOR-2

When the circuit in the front LH wheel sensor is short-cir-
cuited. Or when the distance between the wheel sensor 
and sensor rotor is too large and the sensor pulse cannot 
be recognized by the control unit.

Self-diagnosis results

RR RH SENSOR-2

RR LH SENSOR-2

FR RH SENSOR-2

FR LH SENSOR-2

C1105, C1106, C1107, C1108 WHEEL SENSOR-2

BRC-35

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

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

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.

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

BRC-36

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1105, C1106, C1107, C1108 WHEEL SENSOR-2

Is the inspection result normal?

YES

>> Replace applicable wheel sensor.

NO

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

Component Inspection

INFOID:0000000001665606

1.

CHECK DATA MONITOR

On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SEN-
SOR”, and check the vehicle speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to diagnosis procedure. Refer to 

BRC-34, "Diagnosis Procedure"

.

Special Repair Requirement

INFOID:0000000001665607

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator
and electric unit (control unit).

>> END

Wheel sensor

—

Voltage

Connector

Terminal

E27 (Front RH)

1

Ground

8 V or more

E60 (Front LH)

B33 (Rear RH)

B34 (Rear LH)

Wheel sensor

Vehicle speed (DATA MONITOR)

FR LH SENSOR

Nearly matches the speedometer dis-
play (

±

10% or less)

FR RH SENSOR

RR LH SENSOR

RR RH SENSOR

C1109 POWER AND GROUND SYSTEM

BRC-37

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1109 POWER AND GROUND SYSTEM

Description

INFOID:0000000001635050

Supplies electric power to the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000001635051

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 

BRC-37, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001635052

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 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT AND

GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

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

3.

Turn ignition switch ON or OFF and check voltage between ABS actuator and electric unit (control unit)
harness connector terminal and ground.

4.

Turn ignition switch OFF.

5.

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

DTC

Display item

Malfunction detected condition

Possible cause

C1109

BATTERY VOLTAGE
[ABNORMAL]

When the ABS actuator and electric unit (control unit) 
power supply voltage is lower than normal.

• Harness or connector
• ABS actuator and electric unit 

(control unit)

Self-diagnosis results

BATTERY VOLTAGE [ABNORMAL]

ABS actuator and electric unit (control unit)

—

Condition

Voltage

Connector

Terminal

E41

28

Ground

Ignition switch: ON

Battery voltage

Ignition switch: OFF

Approx. 0 V

 

 

 

 

 

 

 

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