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
.
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
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
.
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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