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

SN-30, "DTC Index"

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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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