Nissan Maxima. Manual — part 254
C1114 MAIN RELAY
BRC-37
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
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BRC
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C1114 MAIN RELAY
Description
INFOID:0000000010049060
Activates or deactivates each solenoid valve according to the signals transmitted by the ABS actuator and
electric unit (control unit).
DTC Logic
INFOID:0000000010049061
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:0000000010049062
Regarding Wiring Diagram information, refer to
1.
CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair
or replace terminals.
4. Reconnect connector and perform self-diagnosis. Refer to
BRC-21, "CONSULT Function (ABS)"
Is any item indicated on the self-diagnosis display?
YES
>> GO TO 2
NO
>> Poor connection of connector terminals. Repair or replace connector.
2.
CHECK SOLENOID AND ACTUATOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connec-
tor.
3. Check voltage between ABS actuator and electric unit (control
unit) connector E26 terminal 3 and ground.
DTC
Display item
Malfunction detected condition
Possible cause
C1114
MAIN RELAY
During actuator relay 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 actuator relay 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)
Ground
Voltage
(Approx.)
Connector
Terminal
E26
3
—
Battery voltage
WFIA0499E
BRC-38
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1114 MAIN RELAY
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace malfunctioning components.
3.
CHECK SOLENOID AND ACTUATOR RELAY GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector E26 terminals 1, 4 and ground.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit).
BRC-106, "Removal and Installation"
NO
>> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000010049063
1.
CHECK ACTIVE TEST
1. On “ACTIVE TEST”, select “ABS MOTOR”.
2. Touch “On” and “Off” on screen. Make sure motor relay, actuator relay, V/R output and M/R output operate
as shown in table below.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
Special Repair Requirement
INFOID:0000000010049064
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-6, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-
TRAL POSITION : Special Repair Requirement"
>> END
ABS actuator and electric unit (control
unit)
Ground
Continuity
Connector
Terminal
E26
1
—
Yes
4
ALFIA0007ZZ
Operation
On
Off
MOTOR RELAY
On
Off
ACTUATOR RLY
On
On
V/R OUTPUT
On
On
M/R OUTPUT
On
Off
C1115 ABS SENSOR [ABNORMAL SIGNAL]
BRC-39
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
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C1115 ABS SENSOR [ABNORMAL SIGNAL]
Description
INFOID:0000000010049065
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:0000000010049066
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:0000000010049067
Regarding Wiring Diagram information, refer to
CAUTION:
Do not check between wheel sensor terminals.
1.
CONNECTOR INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector and wheel sensor of malfunctioning
code.
2. Check terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair or replace as necessary.
2.
CHECK WHEEL SENSOR OUTPUT SIGNAL
1. Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
2. Turn on the ABS active wheel sensor tester power switch.
NOTE:
The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the
battery in the ABS active wheel sensor tester before proceeding.
3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel
sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
NOTE:
If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and
retest.
Does the ABS active wheel sensor tester detect a signal?
YES
>> GO TO 3
NO
>> Replace the wheel sensor. Refer to
BRC-102, "Removal and Installation - Front Wheel Sensor"
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]
BRC-40
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1115 ABS SENSOR [ABNORMAL SIGNAL]
3.
CHECK TIRES
Check the inflation pressure, wear and size of each tire.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Adjust tire pressure, or replace tire(s).
4.
CHECK WHEEL BEARINGS
Check wheel bearing axial end play. Refer to
(front) or
(rear).
Is the inspection result normal?
YES
>> GO TO 5
NO
>> Repair or replace as necessary. Refer to
FAX-7, "Removal and Installation"
(front) or
(rear).
5.
CHECK WIRING HARNESS FOR SHORT CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connec-
tor and wheel sensor of malfunctioning code.
2. Check continuity between front wheel sensor connector termi-
nals (A), rear wheel sensor connector terminals (B) and ground.
Is the inspection result normal?
YES
>> GO TO 6
NO
>> Repair the circuit.
6.
CHECK WIRING HARNESS FOR OPEN CIRCUIT
Check continuity between ABS actuator and electric unit (control unit) connector and the malfunctioning wheel
sensor connector.
Is the inspection result normal?
YES
>> Replace the ABS actuator and electric unit (control unit). Refer to
.
NO
>> Repair the circuit.
Component Inspection
INFOID:0000000010049068
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.
: Continuity should not exist.
AWFIA0443ZZ
Wheel sensor
ABS actuator and electric unit (control unit)
Wheel sensor
Continuity
Connector
Terminal
Connector
Terminal
Yes
Front LH
E26
16
E19
1
5
2
Front RH
9
E41
1
10
2
Rear LH
6
C1
1
17
2
Rear RH
8
C2
1
19
2
Wheel sensor
Vehicle speed (DATA MONITOR)
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