Infiniti QX56 (Z62). Manual — part 140
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
BRC-45
< ECU DIAGNOSIS INFORMATION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
ECU DIAGNOSIS INFORMATION
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Reference Value
INFOID:0000000006222579
CONSULT-III DATA MONITOR STANDARD VALUE
Monitor item
Condition
Reference values in normal operation
FR LH SENSOR
Vehicle stopped
0.00 km/h (MPH)
When driving
(Note 1)
Nearly matches the speedometer dis-
play (within
±
10%)
FR RH SENSOR
Vehicle stopped
0.00 km/h (MPH)
When driving
(Note 1)
Nearly matches the speedometer dis-
play (within
±
10%)
RR LH SENSOR
Vehicle stopped
0.00 km/h (MPH)
When driving
(Note 1)
Nearly matches the speedometer dis-
play (within
±
10%)
RR RH SENSOR
Vehicle stopped
0.00 km/h (MPH)
When driving
(Note 1)
Nearly matches the speedometer dis-
play (within
±
10%)
DECEL G-SEN
When stopped
Approx. 0 G
During acceleration
Positive value
During deceleration
Negative value
FR RH IN SOL
Active
On
Inactive
Off
FR RH OUT SOL
Active
On
Inactive
Off
FR LH IN SOL
Active
On
Inactive
Off
FR LH OUT SOL
Active
On
Inactive
Off
RR RH IN SOL
Active
On
Inactive
Off
RR RH OUT SOL
Active
On
Inactive
Off
RR LH IN SOL
Active
On
Inactive
Off
RR LH OUT SOL
Active
On
Inactive
Off
EBD WARN LAMP
When brake warning lamp is ON
(Note 2)
On
When brake warning lamp is OFF
(Note 2)
Off
STOP LAMP SW
Brake pedal depressed
On
Brake pedal not depressed
Off
MOTOR RELAY
Active
On
Inactive
Off
ACTUATOR RLY
Active
On
Inactive (in fail-safe mode)
Off
BRC-46
< ECU DIAGNOSIS INFORMATION >
[WITH VDC]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
ABS WARN LAMP
When ABS warning lamp is ON
(Note 2)
On
When ABS warning lamp is OFF
(Note 2)
Off
OFF LAMP
When VDC OFF indicator lamp is ON
(Note 2)
On
When VDC OFF indicator lamp is OFF
(Note 2)
Off
OFF SW
VDC OFF switch ON
On
VDC OFF switch OFF
Off
SLIP/VDC LAMP
When VDC warning lamp is ON or Blinking
(Note 2)
On
When VDC warning lamp is OFF
(Note 2)
Off
BATTERY VOLT
Ignition switch ON
10 – 16 V
GEAR
Driving
1 – 7
Depending on shift status
ENGINE SPEED
Engine stopped
0 tr/min
Engine running
Almost same reading as tachometer
YAW RATE SEN
Vehicle stopped
Approx. 0 d/s
Turning right
Negative value
Turning left
Positive value
R POSI SIG
When selector lever is in the R position
On
When selector lever is in the other position than R
Off
4WD MODE MON
(Note 3)
When 4WD sift switch is AUTO position
AUTO
When 4WD sift switch is 4H position
LOCK
When 4WD sift switch is 4L position
##
N POSI SIG
When selector lever is in the N position
On
When selector lever is in the other position than N
Off
CV1
Active
On
Inactive
Off
CV2
Active
On
Inactive
Off
SV1
Active
On
Inactive
Off
SV2
Active
On
Inactive
Off
STOP LAMP SW2
Brake pedal depressed
On
Brake pedal not depressed
Off
ACCEL POS SIG
Never depress accelerator pedal
(with ignition switch ON)
0%
Depress accelerator pedal
(with ignition switch ON)
0 – 100%
SIDE G-SENSOR
Vehicle stopped
Approx. 0 m/s
2
Right turn
Negative value
Left turn
Positive value
STR ANGLE SIG
When driving straight
0
±
2.5
°
When steering wheel is steered to LH by 90
°
Approx. +90
°
When steering wheel is steered to RH by 90
°
Approx. –90
°
Monitor item
Condition
Reference values in normal operation
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
BRC-47
< ECU DIAGNOSIS INFORMATION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Note 1: Confirm tire pressure is standard value.
Note 2: Refer to
for ON/Blinking/OFF conditions of each warning lamp and indi-
cator lamp.
Note 3: Models with 4WD System
Note 4: Models with Advanced Driver Assistance System
Note 5: USS means “hill start assist”.
Fail-safe
INFOID:0000000006222580
VDC FUNCTION, TCS FUNCTION, hill start assist FUNCTION AND BRAKE LIMITED SLIP DIFFER-
ENTIAL (BLSD) FUNCTION
VDC warning lamp in combination meter turn ON when a malfunction occurs in system [ABS actuator and
electric unit (control unit)]. The control is suspended for VDC function, TCS function, hill start assist function
and brake limited slip differential (BLSD) function. The Vehicle status becomes the same as models without
PRESS SENSOR
Brake pedal not depressed
Approx. 0 bar
Brake pedal depressed
(
−
40) – (+300) bar
ACCUM PRESS SEN
With ignition switch ON
Approx. 0 – 210 bar (Proportional to the
amount of accumulated pressure in the
accumulator)
CONT PRESS SEN
(Note 4)
Brake pedal not depressed
Approx. 0 bar
Brake pedal depressed
(
−
40) – (+300) bar
EBD SIGNAL
EBD is active
On
EBD is inactive
Off
ABS SIGNAL
ABS is active
On
ABS is inactive
Off
TCS SIGNAL
TCS is active
On
TCS is inactive
Off
VDC SIGNAL
VDC is active
On
VDC is inactive
Off
EBD FAIL SIG
In EBD fail-safe
On
EBD is normal
Off
ABS FAIL SIG
In ABS fail-safe
On
ABS is normal
Off
TCS FAIL SIG
In TCS fail-safe
On
TCS is normal
Off
VDC FAIL SIG
In VDC fail-safe
On
VDC is normal
Off
CRANKING SIG
At cranking
On
Other than at cranking
Off
FLUID LEV SW
When brake fluid level switch is ON (brake fluid level
is less than the specified level)
On
When brake fluid level switch is OFF
Off
PARK BRAKE SW
When parking brake is active
On
Parking brake is released
Off
STP ON RLY
Stop lamp relay is active
On
Stop lamp relay is inactive
Off
USS SIG
(Note 5)
hill start assist is active
On
hill start assist is inactive
Off
Monitor item
Condition
Reference values in normal operation
BRC-48
< ECU DIAGNOSIS INFORMATION >
[WITH VDC]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
VDC function, TCS function, hill start assist function and brake limited slip differential (BLSD) function. How-
ever, ABS function and EBD function are operated normally.
ABS FUNCTION
ABS warning lamp and VDC warning lamp in combination meter turn ON when a malfunction occurs in system
[ABS actuator and electric unit (control unit)]. The control is suspended for VDC function, TCS function, ABS
function, hill start assist function and brake limited slip differential (BLSD) function. The vehicle status
becomes the same as models without VDC function, TCS function, ABS function, hill start assist function and
brake limited slip differential (BLSD) function. However, EBD function is operated normally.
NOTE:
ABS self-diagnosis sound may be heard the same as in the normal condition, because self-diagnosis is per-
formed when ignition switch turns ON and when vehicle initially starts.
EBD FUNCTION
ABS warning lamp, brake warning lamp and VDC warning lamp in combination meter turn ON when a mal-
function occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC
function, TCS function, ABS function, EBD function, hill start assist function and brake limited slip differential
(BLSD) function. The vehicle status becomes the same as models without VDC function, TCS function, ABS
function, EBD function, hill start assist function and brake limited slip differential (BLSD) function.
DTC
Malfunction detected condition
Fail-safe condition
C1101
When an open circuit is detected in rear RH wheel sensor circuit.
The following functions are sus-
pended.
• VDC function
• TCS function
• ABS function
• EBD function (only when both 2
rear wheels are malfunctioning)
• hill start assist function
• Brake limited slip differential
(BLSD) function
C1102
When an open circuit is detected in rear LH wheel sensor circuit.
C1103
When an open circuit is detected in front RH wheel sensor circuit.
C1104
When an open circuit is detected in front LH wheel sensor circuit.
C1105
• When power supply voltage of rear RH wheel sensor is low.
• When distance between rear RH wheel sensor and rear RH wheel sensor rotor is
large.
• When installation of rear RH wheel sensor or rear RH wheel sensor rotor is not
normal.
C1106
• When power supply voltage of rear LH wheel sensor is low.
• When distance between rear LH wheel sensor and rear LH wheel sensor rotor is
large.
• When installation of rear LH wheel sensor or rear LH wheel sensor rotor is not nor-
mal.
C1107
• When power supply voltage of front RH wheel sensor is low.
• When distance between front RH wheel sensor and front RH wheel sensor rotor
is large.
• When installation of front RH wheel sensor or front RH wheel sensor rotor is not
normal.
C1108
• When power supply voltage of front LH wheel sensor is low.
• When distance between front LH wheel sensor and front LH wheel sensor rotor is
large.
• When installation of front LH wheel sensor or front LH wheel sensor rotor is not
normal.
C1109
• When ignition voltage is 10 V or less.
• When ignition voltage is 16 V or more.
The following functions are sus-
pended.
• VDC function
• TCS function
• ABS function
• EBD function
• hill start assist function
• Brake limited slip differential
(BLSD) function
C1111
• When a malfunction is detected in motor or motor relay.
• When a low pressure malfunction is detected in accumulator.
• When a malfunction is detected in accumulator pressure sensor.
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