Infiniti QX56 (JA60). Manual - part 591

DIAGNOSIS SYSTEM (BCM)

HAC-21

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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DIAGNOSIS SYSTEM (BCM)

CONSULT-III Function (BCM - COMMON ITEM)

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APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.

NOTE:

It can perform the diagnosis modes except the following for all sub system selection items.

CONSULT-III Function (BCM - AIR CONDITIONER)

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DATA MONITOR

Diagnosis mode

Function Description

WORK SUPPORT

Changes the setting for each system function.

SELF-DIAG RESULTS

Displays the diagnosis results judged by BCM. Refer to 

BCS-54, "DTC Index"

.

CAN DIAG SUPPORT MNTR

Monitors the reception status of CAN communication viewed from BCM.

DATA MONITOR

The BCM input/output signals are displayed.

ACTIVE TEST

The signals used to activate each device are forcibly supplied from BCM.

ECU IDENTIFICATION

The BCM part number is displayed.

CONFIGURATION

• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

WORK SUPPORT

DATA MONITOR

ACTIVE TEST

BCM

BCM

×

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

Air conditioner

AIR CONDITONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

Immobilizer

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

×

RAP (retained accessory power)

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS (tire pressure monitoring sys-
tem)

AIR PRESSURE MONITOR

×

×

×

Panic alarm system

PANIC ALARM

×

HAC-22

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

DIAGNOSIS SYSTEM (BCM)

Monitor Item

[Unit]

Contents

IGN ON SW [ON/OFF]

Display [ignition switch position (On)/(Off), ACC position (Off)] status as judged from ignition 
switch signal

FAN ON SIG [ON/OFF]

Display [FAN (On)/FAN (Off)] status as judged form blower fan motor switch signal

AIR COND SW [ON/OFF]

Display [COMP (On)/COMP (Off)] status as judged form air conditioner switch signal

SELF-DIAGNOSIS FUNCTION

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< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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SELF-DIAGNOSIS FUNCTION

A/C Auto Amp. Self-Diagnosis

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A/C SYSTEM SELF-DIAGNOSIS FUNCTION

The self-diagnosis function is built into the A/C auto amp. to quickly locate the cause of malfunctions.

DESCRIPTION

The self-diagnostic system diagnoses sensors, CAN system, and battery voltage on A/C auto amp. Refer to

applicable sections (items) for details. Fault codes (if any are present) will be displayed in the ambient temper-

ature display area. Refer to 

HAC-24, "A/C System Self-Diagnosis Code Chart"

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SELF-DIAGNOSTIC MODE

NOTE:

Radio must be off.

1. On the A/C and AV switch assembly, press the "SETTING" but-

ton and twist the volume knob clockwise and counterclockwise

until the Self-Diagnosis screen shows on the display. 

2. Scroll down to "Confirmation/Adjustment" and press the

"ENTER" button.

3. Scroll down to "Climate Control" and press the "ENTER" button.

4. The fan bars will flash on the display during the self-test, and

then the fault codes will display in the ambient temperature area.

They will continue scrolling until diagnostic mode is exited.

5. Exit by pressing the "BACK" button on A/C and AV switch

assembly until display returns to its normal operation screen.

HVAC system will be OFF.

The self-diagnostic system diagnoses sensors, CAN system, and battery voltage on A/C auto amp. Refer to

applicable sections (items) for details. Fault codes (if any are present) will be displayed in the ambient temper-

ature display area. Refer to 

HAC-24, "A/C System Self-Diagnosis Code Chart"

.

A/C and AV Switch Assembly Self-Diagnosis

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A/C and AV switch assembly self-diagnosis function

The ON/OFF operation (continuity) of each switch in the A/C and AV switch assembly can be checked.

Self-diagnosis mode

AWNIA0098ZZ

AWIIA0081ZZ

HAC-24

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

SELF-DIAGNOSIS FUNCTION

• Press the “BACK” switch and the “UP” switch within 10 seconds

after turning the ignition switch from OFF to ACC and hold them for

3 seconds or more. Then the buzzer sounds, all indicators of the

preset switch illuminate, and the self-diagnosis mode starts.

• The continuity of each switch and control dials (A/C and AV switch

assembly only) at the ON position can be checked by pressing

each switch and turning each control dial. The buzzer sounds and

LED’s will illuminate if the switch is normal.

Finishing self-diagnosis mode

Self-diagnosis mode is canceled when turning the ignition switch OFF.

A/C System Self-Diagnosis Code Chart

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SELF-DIAGNOSTIC CODE CHART

AWIIA0171GB

Code No.

Reference page

03

Battery voltage out of range

CHG-9, "Diagnosis Procedure"

30

In-vehicle sensor circuit out of range (low)

HAC-78, "In-Vehicle Sensor Diagnosis Procedure"

31

In-vehicle sensor circuit out of range (high)

40

Ambient sensor circuit short

HAC-75, "Ambient Sensor Diagnosis Procedure"

41

Ambient sensor circuit open

50

Optical sensor (Driver) circuit open or short

HAC-81, "Optical Sensor Diagnosis Procedure"

52

Optical sensor (Passenger) circuit open or short

56

Intake sensor circuit short

HAC-83, "Intake Sensor Diagnosis Procedure"

57

Intake sensor circuit open

80

CAN bus fault

LAN-14, "Trouble Diagnosis Flow Chart"