Infiniti QX56 (Z62). Manual — part 138
SYSTEM
BRC-37
< SYSTEM DESCRIPTION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
SYSTEM DIAGRAM
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
*: Communication line between yaw rate/side/decal G sensor and ABS actuator and electric unit (control unit)
BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) FUNCTION
BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) FUNCTION : System Description
INFOID:0000000006222577
• LH and RH driving wheel spin is always monitored. If necessary, appropriate brake force is independently
applied to LH or RH driving wheel so that one-sided wheel spin is avoided and traction is maintained. Mainly
starting ability is improved.
JPFIC0145GB
Component
Signal description
Yaw rate/side/decel G sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-
munication line *.
• Yaw rate signal
• Side G sensor signal
• Decel G sensor signal
ECM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Accelerator pedal position signal
• Engine speed signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• Target throttle position signal
TCM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Shift position signal
Combination meter
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• VDC warning lamp signal
• VDC OFF indicator lamp signal
BRC-38
< SYSTEM DESCRIPTION >
[WITH VDC]
SYSTEM
• Brake limited slip differential (BLSD) function operates while VDC function is in non-operational status (OFF)
by VDC OFF switch.
• VDC warning lamp blinking while brake limited slip differential (BLSD) function is in operation and indicates
to the driver that the function is in operation.
• Slight vibrations are felt on the brake pedal and the operation noises occur, when brake limited slip differen-
tial (BLSD) function operates. This is not a malfunction because it is caused by brake limited slip differential
(BLSD) function that is normally operated.
• Fail-safe function is adopted. When a malfunction occurs in brake limited slip differential (BLSD) function,
the control is suspended for VDC function, TCS function, hill start assist function and brake limited slip differ-
ential (BLSD) function. The vehicle status becomes the same as models without VDC function, TCS func-
tion, hill start assist function and brake limited slip differential (BLSD) function. However, ABS function and
EBD function are operated normally. Refer to
.
SYSTEM DIAGRAM
NOTE:
Transfer control unit is applied to models with 4WD system.
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JPFIC0183GB
Component
Signal description
Yaw rate/side/decel G sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-
munication line
*1
.
• Yaw rate signal
• Side G sensor signal
• Decel G sensor signal
ECM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Accelerator pedal position signal
• Engine speed signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• Target throttle position signal
TCM
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Shift position signal
SYSTEM
BRC-39
< SYSTEM DESCRIPTION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
*1: Communication line between yaw rate/side/decal G sensor and ABS actuator and electric unit (control unit)
*2: Models with 4WD system
Transfer control unit
*2
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Current 4WD mode signal
Steering angle sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Steering angle sensor signal
Combination meter
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• VDC warning lamp signal
• VDC OFF indicator lamp
Component
Signal description
BRC-40
< SYSTEM DESCRIPTION >
[WITH VDC]
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
CONSULT-III Function
INFOID:0000000006222578
APPLICATION ITEMS
CONSULT-III can display each diagnostic item using the diagnostic test modes as follows.
*
: The following diagnosis information is erased by erasing.
• DTC
• Freeze frame data (FFD)
ECU IDENTIFICATION
ABS actuator and electric unit (control unit) part number can be read.
SELF DIAGNOSTIC RESULT
.
When “CRNT” is displayed on self-diagnosis result,
• The system is presently malfunctioning.
When “PAST” is displayed on self-diagnosis result,
• System malfunction in the past is detected, but the system is presently normal.
Freeze frame data (FFD)
DATA MONITOR
×
: Applicable
Mode
Function description
ECU identification
Parts number of ABS actuator and electric unit (control unit) can be read.
Self Diagnostic Result
Self-diagnostic results and freeze frame data can be read and erased quickly.
*
DATA MONITOR
Input/Output data in the ABS actuator and electric unit (control unit) can be read.
ACTIVE TEST
Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ABS actuator and
electric unit (control unit) and also shifts some parameters in a specified range.
WORK SUPPORT
Components can be quickly and accurately adjusted.
Item name
Display item
IGN counter
(0
−
39)
The number of times that ignition switch is turned ON after the DTC is detected is displayed.
• When “0” is displayed: It indicates that the system is presently malfunctioning.
• When except “0” is displayed: It indicates that system malfunction in the past is detected, but the system is pres-
ently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1
→
2
→
3...38
→
39. When
the operation number of times exceeds 39, the number do not increase and “39” is displayed until self-diagnosis
is erased.
Item (Unit)
Monitor item selection
Note
INPUT SIGNALS
MAIN ITEMS
FR LH SENSOR
[km/h (MPH)]
×
×
Wheel speed calculated by front LH wheel sensor is dis-
played.
FR RH SENSOR
[km/h (MPH)]
×
×
Wheel speed calculated by front RH wheel sensor is dis-
played.
RR LH SENSOR
[km/h (MPH)]
×
×
Wheel speed calculated by rear LH wheel sensor is dis-
played.
RR RH SENSOR
[km/h (MPH)]
×
×
Wheel speed calculated by rear RH wheel sensor is dis-
played.
DECEL G-SEN
(G)
×
×
Decel G detected by decel G sensor is displayed.
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