Infiniti QX56 (JA60). Manual — part 871
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REAR SONAR SYSTEM
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1. Push and hold sonar system OFF switch for three seconds to
reset time-out counter.
2. Push and hold sonar system OFF switch for three seconds to
clear codes.
LKIA0391E
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< FUNCTION DIAGNOSIS >
FRONT AND REAR SONAR SYSTEM
FRONT AND REAR SONAR SYSTEM
System Diagram
INFOID:0000000005146189
System Description
INFOID:0000000005146190
FUNCTION
With power and ground supplied, transmission gear selector lever in R position, and the sonar system OFF
switch ON, the sonar system will detect obstacles within 1.8 m (5.9 ft.) of the rear sonar sensors and the two
outer front sonar sensors. The vehicle operator is notified of obstacles by varied rate of tone from the rear
sonar buzzer depending on distance of obstacle being sensed. If the vehicle speed reaches 50 km/h (31
MPH) the sonar system will shut down.
With power and ground supplied, transmission gear selector lever in a forward drive gear, and the sonar sys-
tem OFF switch ON, the front sonar system will detect obstacles within 1.0 m (3 ft.) of the front sonar sensors.
The vehicle operator is notified of obstacles by varied rate of tone from the front sonar buzzer depending on
distance of obstacle being sensed. When the vehicle accelerates to 12 km/h (7.5 MPH) the sonar system will
shut down. When the vehicle decelerates to 8 km/h (5 MPH) the sonar system will turn back on.
SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in a position other
than P, the sonar system can be disabled and the sonar buzzers silenced by momentarily pressing the sonar
system OFF switch. The sonar system OFF indicator lamp will be illuminated in the sonar system OFF switch.
The sonar system and buzzers will be disabled and the sonar system OFF indicator will be illuminated until the
ignition switch is turned OFF. When the ignition switch is turned ON, the sonar system will be enabled.
Depressing the sonar system OFF switch again will enable the sonar system also. Enabling the sonar system
will cause the sonar system OFF indicator to go out. The indicator will flash if a malfunction exists in the sys-
tem.
SONAR BUZZERS
With power and ground supplied to the sonar control unit and the A/T selector lever in R position, a stationary
object that is at least 9.0 cm (3.5 in.) wide and that is closer than 1.8 m (5.9 ft.) will be detected by the rear
sonar sensors and the two outer front sonar sensors, causing the rear sonar buzzer to sound a tone. As the
vehicle moves closer to the object, the rate of the tone will increase. When the object is less than 25.0 cm (10
in.) from the rear bumper, the tone will sound continuously.
With power and ground supplied to the sonar control unit and the A/T selector lever in a forward drive gear, a
stationary object that is at least 9.0 cm (3.5 in.) wide and that is closer than 1.0 m (3 ft.) will be detected by the
front sonar sensors, causing the front sonar buzzer to sound a tone. As the vehicle moves closer to the object,
the rate of the tone will increase. When the object is less than 30 cm (12 in.) from the front bumper, the tone
will sound continuously.
REAR SONAR SENSORS
With power and ground supplied to the rear sonar sensors, the sonar sensors transmit an ultrasonic signal.
This signal is reflected back to the sensor by objects large enough and close enough to be detected. The rear
AWNIA0128GB
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FRONT AND REAR SONAR SYSTEM
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< FUNCTION DIAGNOSIS >
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sonar sensors measure the time from the transmitted signal to the time the signal is reflected back and send
this information to the sonar control unit.
FRONT SONAR SENSORS
With power and ground supplied to the front sonar sensors, the sonar sensors transmit an ultrasonic signal.
This signal is reflected back to the sensor by objects large enough and close enough to be detected. The front
sonar sensors measure the time from the transmitted signal to the time the signal is reflected back and send
this information to the sonar control unit.
COMBINATION METER
The combination meter provides the vehicle speed and park signals to the sonar control unit.
Component Parts Location
INFOID:0000000005146191
Front
1.
Sonar control unit B56, B57
(View with luggage side finisher LH removed)
2.
Back-up lamp relay M73
3.
A/T assembly F9
4.
Front sonar buzzer M118
5.
Sonar system OFF switch M116
(with sonar system OFF indicator)
6.
Rear sonar sensor LH outer C102
7.
Rear sonar sensor LH inner C103
8.
Rear sonar sensor RH inner C104 9.
Rear sonar sensor RH outer C105
10. Front sonar sensor RH outer E166
11. Front sonar sensor RH inner E163 12. Front sonar sensor LH inner E162
13. Front sonar sensor LH outer E158
14. Combination meter M23, M24
15. Rear sonar buzzer B166
(View with back door open)
AWNIA1853ZZ
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< FUNCTION DIAGNOSIS >
FRONT AND REAR SONAR SYSTEM
Component Description
INFOID:0000000005146192
CONSULT-III Function (SONAR)
INFOID:0000000005146193
SELF DIAGNOSTIC PROCEDURE
CONSULT-III can be used to read and clear DTCs. Refer to
.
SELF DIAGNOSTIC RESULTS
Component
Function
Sonar control unit
Controls sonar system and provides self-diagnosis
Back-up lamp relay
Provides reverse signal for sonar control unit
A/T assembly
Controls back-up lamp relay
Front sonar buzzer
Sounds a signal when objects are detected in the front of the vehicle
Rear sonar buzzer
Sounds a signal when objects are detected in the rear of the vehicle
Sonar system OFF switch
Enables the driver to turn the system off and signals a system malfunction
Front sonar sensors
Senses objects in the front of the vehicle
Rear sonar sensors
Senses objects in the rear of the vehicle
Combination meter
Provides Park and vehicle speed signals for sonar control unit
Diagnosis mode
Description
SELF-DIAG RESULTS
Displays sonar control unit self-diagnosis results.
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