Infiniti QX56 (Z62). Manual - part 788

 

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Infiniti QX56 (Z62). Manual - part 788

 

 

A/C AUTO AMP.

HAC-43

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

TERMINAL LAYOUT

PHYSICAL VALUES

RR XM

Ignition switch ON

Value according to target air 
flow temperature (rear side)

ENG COOL TEMP

Ignition switch ON

Equivalent to engine coolant 
temperature

VEHICLE SPEED

Driving

Equivalent to speedometer 
reading

Monitor item

Condition

Value/Status

JMIIA0787ZZ

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

Signal name

Input/

Output

1

(L)

CAN-H

Input/

Output

2

(B)

Ground

3

(Y/G)

Ground

Battery power supply

Input

Ignition switch OFF

Battery voltage

4

(V)

Ground

ACC power supply

Input

Ignition switch ACC

Battery voltage

5

*1

(W)

Ground

Ionizer (ON/OFF) control 
signal

Output

Ignition 
switch 
ON

Front blower 
motor: ON

0 V

Front blower 
motor: OFF

12 V

6

(V/W)

Ground

A/C auto amp. connection 
recognition signal

Output

Ignition switch ON

12 V

7

(W/R)

Ground

Ambient sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with ambient 

temperature

8

(GR/L)

Ground

Rear in-vehicle sensor sig-
nal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with in-vehi-

cle temperature (rear side)

9

(BR)

Ground

Sunload sensor (driver side) 
signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with sunload 

(driver side) amount

10

*1

(V/W)

Ground

Exhaust gas / outside odor 
detecting sensor signal

Input

Ignition switch ON
NOTE:
The signal is depending 
on measurement environ-
ment of the vehicle

ZJIA1163J

HAC-44

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

A/C AUTO AMP.

11

(W)

Ground

Communication signal
(A/C auto amp.

Rear A/C 

control)

Output

Ignition switch ON

14

(O/L)

Ground

Front blower motor control 
signal

Output

• Ignition switch ON
• Front fan speed: 1st 

speed (manual)

16

(R/G)

Ground

Each door motor LIN signal

Input/

Output

Ignition switch ON

17

(L/Y)

Ground

Each door motor power sup-
ply

Output

Ignition switch ON

12 V

21

(P)

CAN-L

Input/

Output

22

(B)

Ground

23

(GR/L)

Ground

Ignition power supply

Input

Ignition switch ON

Battery voltage

25

*1, *

(R)

26

(B)

Sensor ground

27

(GR)

Ground

Front in-vehicle sensor sig-
nal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with in-vehi-

cle temperature (front side)

28

(R)

Ground

Intake sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with front 

evaporator fin temperature

29

(O)

Ground

Sunload sensor (passenger 
side) signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with sunload 

(passenger side) amount

31

(O/L)

Ground

Communication signal
(Rear A/C control

A/C auto 

amp.)

Input

Ignition switch ON

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

Signal name

Input/

Output

SJIA1521J

JSIIA0096ZZ

SJIA1453J

SJIA1522J

A/C AUTO AMP.

HAC-45

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*1: With ACCS (advanced climate control system) 
*2: A/C auto amp. is not used for control.

Fail-safe

INFOID:0000000006275887

FAIL-SAFE FUNCTION

If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:

When ambient temperature is less than 3

°

C (37

°

F) and engine coolant temperature is less than 56

°

C (133

°

F)

When ambient temperature is 3

°

C (37

°

F) or more, or engine coolant temperature is 56

°

C (133

°

F) or more

DTC Index

INFOID:0000000006275888

34

(L/O)

Ground

Rear blower motor control 
signal

Output

• Ignition switch ON
• Rear fan speed: 1st 

speed (manual)

37

(B)

Ground

38

(G/W)

Ground

Rear A/C relay control signal

Output

Ignition 
switch 
ON

Rear blower 
motor: ON

0 V

Rear blower 
motor: OFF

12 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

Signal name

Input/

Output

JSIIA0096ZZ

Compressor

: ON

Air outlet

: DEF

Air inlet

: FRE (Fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

Compressor

: ON

Air outlet

: AUTO

Air inlet

: 20% FRE (20% fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

DTC

Items

(CONSULT-III screen terms)

Reference

U1000

CAN COMM CIRCUIT

HAC-72, "DTC Logic"

U1010

CONTROL UNIT (CAN)

HAC-73, "DTC Logic"

B2578

IN-VEHICLE SENSOR

HAC-74, "DTC Logic"

B2579

IN-VEHICLE SENSOR

HAC-74, "DTC Logic"

B257B

AMBIENT SENOR

HAC-77, "DTC Logic"

B257C

AMBIENT SENOR

HAC-77, "DTC Logic"

B2581

INTAKE SENSOR

HAC-80, "DTC Logic"

B2582

INTAKE SENSOR

HAC-80, "DTC Logic"

HAC-46

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

A/C AUTO AMP.

*1: With ACCS (advanced climate control system)
*2: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload
sensor, otherwise self-diagnosis indicates even though the sunload sensor is functioning normally.
NOTE:
If all of door motor DTCs (B2632, B2633, B2634, B2635, B2636, B2637, B2638, B2639, B263D, B263E,
B263F, B2654, B2655, B2661, B2662, B2663, B2664, B2665, B2666, B2669, and B266A) are detected, check
door motor communication circuit. Refer to 

HAC-120, "Diagnosis Procedure"

.

B262A

*1

GAS SENSOR

HAC-83, "DTC Logic"

B262B

*1

GAS SENSOR

HAC-83, "DTC Logic"

B2630

*2

SUNLOAD SENSOR

HAC-86, "DTC Logic"

B2631

*2

SUNLOAD SENSOR

HAC-86, "DTC Logic"

B2632

DR AIRMIX DOOR MOT

HAC-89, "DTC Logic"

B2633

DR AIRMIX DOOR MOT

HAC-89, "DTC Logic"

B2634

PASS AIR MIX DOOR MOT

HAC-91, "DTC Logic"

B2635

PASS AIR MIX DOOR MOT

HAC-91, "DTC Logic"

B2636

DR VENT DOOR FAIL

HAC-93, "DTC Logic"

B2637

DR B/L DOOR FAIL

HAC-93, "DTC Logic"

B2638

DR D/F1 DOOR FAIL

HAC-93, "DTC Logic"

B2639

DR DEF DOOR FAIL

HAC-93, "DTC Logic"

B263D

FRE DOOR FAIL

HAC-95, "DTC Logic"

B263E

20P FRE DOOR FAIL

HAC-95, "DTC Logic"

B263F

REC DOOR FAIL

HAC-95, "DTC Logic"

B2654

D/F2 DOOR FAIL

HAC-93, "DTC Logic"

B2655

B/L2 DOOR FAIL

HAC-93, "DTC Logic"

B2657

*1

GAS SENSOR CIRCUIT

HAC-83, "DTC Logic"

B2658

*1

GAS SENSOR CIRCUIT

HAC-83, "DTC Logic"

B2661

UPPER VENT DOOR MOT

HAC-97, "DTC Logic"

B2662

UPPER VENT DOOR MOT

HAC-97, "DTC Logic"

B2663

UPPER VENT DOOR MOT

HAC-97, "DTC Logic"

B2664

REAR AIR MIX DOOR MOT

HAC-99, "DTC Logic"

B2665

REAR AIR MIX DOOR MOT

HAC-99, "DTC Logic"

B2666

REAR MODE DOOR MOT

HAC-101, "DTC Logic"

B2667

*2

PASS SUNLOAD SENSOR

HAC-103, "DTC Logic"

B2668

*2

PASS SUNLOAD SENSOR

HAC-103, "DTC Logic"

B2669

REAR MODE DOOR MOT

HAC-101, "DTC Logic"

B266A

REAR MODE DOOR MOT

HAC-101, "DTC Logic"

B266B

REAR IN-VEHICLE SEN

HAC-106, "DTC Logic"

B266C

REAR IN-VEHICLE SEN

HAC-106, "DTC Logic"

B27B0

A/C AUTO AMP.

HAC-109, "DTC Logic"

DTC

Items

(CONSULT-III screen terms)

Reference

 

 

 

 

 

 

 

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