Infiniti QX56 (JA60). Manual — part 870
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INSPECTION AND ADJUSTMENT
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< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
Preliminary Check
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DESCRIPTION
The purpose of the sonar sensor preliminary check is to confirm that there are no outside factors affecting the
sonar system.
CONDITIONS
• Ignition switch ON
• No obstructions within 3.0 m (10 ft.) of sonar sensors
SONAR SENSOR STATUS CHECK
• Check that the sonar sensors are properly aligned (no deformation in sensor mounting areas).
• Check that snow, mud or other foreign objects are not adhering to the sonar sensors.
• Check that there is no deformation, scratches or other damage to the sonar sensors.
• Check that water has not accumulated in the sonar sensors.
CAUTION:
Use water, cotton swab, or other soft material for cleaning the sensors.
1. Check that there are no obstacles within each sonar sensor's detection range.
2. Check that there are no nearby ultrasound sources such as the sounds of vehicle horns, motorcycle
engines or truck air brakes.
3. Check that the vehicle is on a level surface.
Sonar sensors
Detection range
Front
Approx. 1.0 m (3 ft.) maximum
Rear
Approx. 1.8 m (5.9 ft.) maximum
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< FUNCTION DIAGNOSIS >
REAR SONAR SYSTEM
FUNCTION DIAGNOSIS
REAR SONAR SYSTEM
System Diagram
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System Description
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FUNCTION
With power and ground supplied, transmission gear selector lever in R position, and the sonar system OFF
switch ON, the rear sonar system will detect obstacles within 1.8 m (5.9 ft.) of the rear sonar sensors. The
vehicle operator is notified of obstacles by varied rate of tone from the sonar buzzer depending on distance of
obstacle being sensed.
SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in R position, the
sonar system can be disabled and the sonar buzzer 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 rear sonar system and buzzer 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 rear sonar system will be
enabled. Depressing the sonar system OFF switch again will enable the rear sonar system also. Enabling the
rear sonar system will cause the rear sonar system OFF indicator to go out. If the indicator light is blinking
there is a malfunction in the system.
SONAR BUZZER
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 7.0 cm (2.8 in.) wide and 1.0 m (39.0 in.) tall and that is closer than 1.8 m (5.9 ft.) will be
detected by the rear sonar sensors, causing the 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.
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
sonar sensors measure the time from the transmitted signal to the time the signal is reflected back and sends
this information to the sonar control unit.
BACK-UP LAMP RELAY
The back-up lamp relay provides a reverse signal to the sonar control unit.
AWNIA1905GB
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REAR SONAR SYSTEM
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< FUNCTION DIAGNOSIS >
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Component Parts Location
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Component Description
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Self-Diagnosis Function
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There are four modes of self-diagnosis. These modes must be followed in the following order:
1. Entering diagnostics mode
2. Requesting number of fault codes mode
3. Requesting fault codes mode
4. Clearing fault codes mode
Self-diagnosis can be manually exited by turning the ignition OFF or selecting reverse gear. Self-diagnosis will
exit unless a fault code request occurs before a message is repeated five times without acknowledgement.
ENTERING DIAGNOSTICS MODE
1.
Sonar control unit B24
(view with luggage side finisher LH removed)
2.
Back-up lamp relay M73
3.
A/T assembly F9
4.
Sonar buzzer M47
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
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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
Sonar buzzer
Sounds a signal when objects are detected in the rear of the vehicle
Sonar system OFF switch
Enables the driver to turn system off and signals a system malfunction
Sonar sensor
Senses objects in the rear of the vehicle
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< FUNCTION DIAGNOSIS >
REAR SONAR SYSTEM
1. Turn ignition switch ON. Sonar system OFF switch indicator
lamp illuminates for three seconds and then turns off.
2. Immediately push sonar system OFF switch ten times within five
seconds.
3. The sonar buzzer will sound once and the sonar system OFF
indicator will flash once.
REQUESTING NUMBER OF FAULT CODES MODE
1. While in "entering diagnostic mode", push sonar system OFF
switch once within 30 seconds of entering diagnostic mode.
NOTE:
If the number of fault codes is not requested within 30 seconds
after entering diagnostic mode, the system will return to regular
operation mode.
2. The sonar buzzer will sound once.
3. Sonar system OFF indicator will flash once and sonar buzzer
will sound once for each fault code detected.
4. There will be a four second pause.
5. The number of fault codes will repeat five times then pause.
NOTE:
Self-diagnosis will exit unless "requesting fault codes mode" occurs before five repeats ends.
REQUESTING FAULT CODES MODE
1. While in "requesting number of fault codes" mode, push sonar
system OFF switch once.
2. The sonar buzzer will sound once.
3. Sonar system OFF indicator will flash and sonar buzzer will
sound the first digit of the fault code followed by a one second
pause.
4. Sonar system OFF indicator will flash and sonar buzzer will
sound the second digit of the fault code followed by a four sec-
ond pause.
5. Each fault code will repeat five times then pause.
6. Write down each fault code. Then, acknowledge the fault code
by pushing the sonar system OFF switch once (the sonar buzzer may sound).
NOTE:
"Requesting fault codes mode" will exit unless the fault code is acknowledged before it is repeated five
times. When all fault codes have been indicated, "clearing fault codes mode" will be entered. Refer to
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CLEARING FAULT CODES MODE
NOTE:
While in "clearing fault codes mode", self-diagnosis will automatically exit if no activity occurs for 30 seconds.
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