Infiniti M35/M45 Y50. Manual — part 333
TROUBLE DIAGNOSIS
BRC-33
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
Basic Inspection
NFS000QK
BASIC INSPECTION 1: BRAKE FLUID LEVEL, LEAK INSPECTION AND BRAKE PAD
1.
Check fluid level in brake reservoir tank. If fluid level is low, refill brake fluid. Refer to
2.
Check for leakage in brake tubes or hoses and around ABS actuator and electric unit (control unit). If
there is leaking or seeping fluid, check the following items.
●
If the brake tube connections at ABS actuator and electric unit (control unit) are loose, tighten flare nuts
to the specified torque. Then inspect again and confirm that there is no leakage.
●
If flare nuts or screws of ABS actuator and electric unit (control unit) are damaged and loose, replace
damaged parts. Then inspect again and confirm that there is no leakage.
●
If there is leakage at any location other than ABS actuator and electric unit (control unit) connections,
wipe away leakage with clean cloth. Then inspect again and confirm that there is no leakage.
●
If there is leakage from ABS actuator and electric unit (control unit), wipe away leakage with clean cloth.
Then inspect again. If there is still leakage, replace ABS actuator and electric unit (control unit).
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3.
Check brake disc rotor and pads.
●
Front disc rotor: Refer to
BR-27, "DISC ROTOR INSPECTION"
●
Front brake pad: Refer to
●
Rear disc rotor: Refer to
BR-33, "DISC ROTOR INSPECTION"
.
●
Rear brake pad: Refer to
BASIC INSPECTION 2: LOOSENESS OF POWER SYSTEM TERMINALS AND BATTERY
Check battery for looseness on battery positive/negative terminals and ground connection. Also make sure
battery voltage does not drop and alternator is normal.
BASIC INSPECTION 3: ABS WARNING LAMP, BRAKE WARNING LAMP, VDC OFF INDICATOR
LAMP AND SLIP INDICATOR LAMP
ON and OFF Timing for Warning Lamp and Indicator Lamp
×
: ON
–: OFF
Note1: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation
(when brake fluid is insufficient).
Note2: After starting engine, brake warning lamp is turned off.
Check the following items when unsuitable for an above condition.
●
ABS warning lamp:
BRC-48, "CAN Communication Circuit"
.
●
Brake warning lamp:
BRC-48, "CAN Communication Circuit"
,
BRC-46, "Brake Fluid Level Switch Circuit"
,
BRC-50, "Parking Brake Switch Circuit"
●
VDC OFF indicator lamp:
BRC-48, "CAN Communication Circuit"
BRC-49, "VDC OFF Switch Circuit"
●
SLIP indicator lamp:
BRC-48, "CAN Communication Circuit"
.
If malfunction is not found, refer to
BRC-50, "Warning Lamp and Indicator Lamp Circuit"
Condition
ABS warning lamp
VDC OFF
indicator lamp
SLIP indicator lamp
Brake warning lamp
(Note1)
Ignition switch OFF
–
–
–
–
For 1 second after turning ON ignition
switch
×
×
×
×
(Note 2)
1 second later after turning ON ignition
switch
–
–
–
×
(Note 2)
VDC OFF switch turned ON.
(VDC function is OFF.)
–
×
–
–
VDC/TCS function is malfunctioning.
–
×
×
–
ABS function is malfunctioning.
×
×
×
–
EBD function is malfunctioning.
×
×
×
×
BRC-34
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
TROUBLE DIAGNOSIS FOR SYSTEM
PFP:00000
Wheel Sensor Circuit
NFS000QL
CAUTION:
Do not check between wheel sensor terminals.
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK TIRE
Check air pressure, wear and size.
Are air pressure, wear and size within standard?
YES
>> GO TO 3.
NO
>>
●
Adjust air pressure, or replace tire.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
3.
CHECK SENSOR AND SENSOR ROTOR
●
Check sensor rotor for damage.
●
Check wheel sensor for damage, disconnection or looseness.
OK or NG
OK
>> GO TO 4.
NG
>>
●
Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
4.
CHECK CONNECTOR
1.
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30 and
malfunctioning wheel sensor connector E41(FR-RH), E59(FR-LH), B466(RR-RH), B467(RR-LH). Check
terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition
is found.
2.
Reconnect connectors and then perform the self-diagnosis. Refer to
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
Self-diagnosis results
FR RH SENSOR-1, -2
FR LH SENSOR-1, -2
RR RH SENSOR-1, -2
RR LH SENSOR-1, -2
ABS SENSOR [ABNORMAL SIGNAL]
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-35
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
5.
CHECK WHEEL SENSOR HARNESS
1.
Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector E41(FR-RH), E59(FR-LH), B466(RR-RH),
B467(RR-LH) and ABS actuator and electric unit (control unit)
connector E30.
2.
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.)
OK or NG
OK
>> GO TO 6.
NG
>>
●
Repair or replace malfunctioning components.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
6.
CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect malfunctioning wheel sensor connector.
2.
Turn ignition switch ON and check voltage between wheel sen-
sor harness connector power supply terminal and ground.
OK or NG
OK
>> Replace wheel sensor.
NG
>> Replace ABS actuator and electric unit (control unit).
SFIA3030E
Power supply circuit
Signal circuit
Ground circuit
Wheel
ABS actuator
and electric unit
(control unit)
Wheel sensor
ABS actuator
and electric unit
(control unit)
Wheel sensor
ABS actuator
and electric unit
(control unit)
(signal)
Ground
Front RH
9
1
10
2
9, 10
—
Front LH
26
1
5
2
26, 5
Rear RH
7
1
29
2
7, 29
Rear LH
6
1
27
2
6, 27
Power supply circuit
: Continuity should exist.
Signal circuit
: Continuity should exist.
Ground circuit
: Continuity should not exist.
Wheel
Wheel sensor
Ground
Voltage
Front RH
1
—
8 V or more
Front LH
Rear RH
Rear LH
SFIA3341E
BRC-36
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Engine System
NFS000QM
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK ENGINE SYSTEM
1.
Perform ECM self-diagnosis. Repair or replace items indicated, then perform ECM self-diagnosis again.
Refer to
(VK45DE).
2.
Perform ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK
>> INSPECTION END
NG
>>
●
Repair or replace malfunctioning components.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
ABS Actuator and Electric Unit (Control Unit)
NFS000QN
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
CAUTION:
Replace ABS actuator and electric unit (control unit) when self-diagnostic result shows items other
than those above.
Is above displayed on the self-diagnosis display?
YES
>>
●
Replace ABS actuator and electric unit (control unit).
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
NO
>> INSPECTION END
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6
Self-diagnosis results
CONTROLLER FAILURE
EMERGENCY BRAKE
VARIANT CODING
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