Nissan Pathfinder. Manual - part 696

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 heated steering wheel

23

(LG)

Ground

Ignition power supply

Input

Ignition switch ON

Battery voltage

24

(G)

Ground

Communication signal
(A/C switch assembly

→A/C 

auto amp.)

Input

Ignition switch ON

25

(W)

Ground

Communication signal
(Rear air control

→A/C auto 

amp.)

Input

Ignition switch ON

26

(G)

—

Sensor ground

—

—

—

27

(W)

Ground

In-vehicle sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with in-vehi-

cle temperature

28

(W)

Ground

Intake sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with front 

evaporator fin temperature

32

(L)

Ground

Blower motor feedback

Input

• Ignition switch ON
• Blower speed: OFF

Battery voltage

• Ignition switch ON
• Blower speed: 1st

10 V

• Ignition switch ON
• Blower speed: 25th

0 V

34

(L)

Ground

Blower motor feedback

Input

• Ignition switch ON
• Blower speed: OFF

Battery voltage

• Ignition switch ON
• Blower speed: 1st

10 V

• Ignition switch ON
• Blower speed: 25th

0 V

35

(LG)

Ground

Rear window defogger feed-
back

Input

Ignition 
switch 
ON

Rear defog-
ger: ON

Battery voltage

Rear defog-
ger: OFF

0 V

37

(BR)

—

Ground

—

—

—

39

(L)

Ground

PTC2 relay output signal

Input

Ignition 
switch 
ON

PTC heater: 
ON

0 V

PTC heater: 
OFF

Battery voltage

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

−

Signal name

Input/

Output

SJIA1522J

SJIA1522J

HAC-46

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

A/C AUTO AMP.

Fail-safe

INFOID:0000000009176803

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:0000000009176804

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 screen terms)

Reference

U1000

CAN COMM CIRCUIT

HAC-81, "DTC Logic"

U1010

CONTROL UNIT (CAN)

HAC-82, "DTC Logic"

B2578

IN-VEHICLE SENSOR

HAC-83, "DTC Logic"

B2579

IN-VEHICLE SENSOR

HAC-83, "DTC Logic"

B257B

AMBIENT SENSOR

HAC-86, "DTC Logic"

B257C

AMBIENT SENSOR

HAC-86, "DTC Logic"

B2581

INTAKE SENSOR

HAC-89, "DTC Logic"

B2582

INTAKE SENSOR

HAC-89, "DTC Logic"

B2630

*1

SUNLOAD SENSOR

HAC-92, "DTC Logic"

B2631

*1

SUNLOAD SENSOR

HAC-92, "DTC Logic"

B2632

DR AIR MIX DOOR MOT

HAC-95, "DTC Logic"

B2633

DR AIR MIX DOOR MOT

HAC-95, "DTC Logic"

B2634

PASS AIR MIX DOOR MOT

HAC-97, "DTC Logic"

B2635

PASS AIR MIX DOOR MOT

HAC-97, "DTC Logic"

B2636

DR VENT DOOR FAIL

HAC-99, "DTC Logic"

B2637

DR B/L DOOR FAIL

HAC-99, "DTC Logic"

B2638

DR D/F1 DOOR FAIL

HAC-99, "DTC Logic"

B2639

DR DEF DOOR FAIL

HAC-99, "DTC Logic"

B263D

FRE DOOR FAIL

HAC-101, "DTC Logic"

B263E

20P FRE DOOR FAIL

HAC-101, "DTC Logic"

B263F

REC DOOR FAIL

HAC-101, "DTC Logic"

B2654

D/F2 DOOR FAIL

HAC-99, "DTC Logic"

B2796

COMMUNICATION ERROR

HAC-103, "DTC Logic"

B2797

COMMUNICATION ERROR

HAC-103, "DTC Logic"

B2798

COMMUNICATION ERROR

HAC-103, "DTC Logic"

A/C AUTO AMP.

HAC-47

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*1: 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, B2799, B279A, B279B, B279C, B279D, and B279E) are detected, check door motor communi-

cation circuit. Refer to 

HAC-128, "Diagnosis Procedure"

.

B2799

REAR AIR MIX DOOR MOT

HAC-103, "DTC Logic"

B279A

REAR AIR MIX DOOR MOT

HAC-103, "DTC Logic"

B279B

REAR MODE DOOR MOT

HAC-105, "DTC Logic"

B279C

REAR MODE DOOR MOT

HAC-105, "DTC Logic"

B279D

REAR SHUT-OFF DOOR MOT

HAC-105, "DTC Logic"

B279E

REAR SHUT-OFF DOOR MOT

HAC-105, "DTC Logic"

B27B0

A/C AUTO AMP.

HAC-111, "DTC Logic"

DTC

Items

(CONSULT screen terms)

Reference

HAC-48

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONING]

ECM, IPDM E/R, BCM

ECM, IPDM E/R, BCM

List of ECU Reference

INFOID:0000000009176805

ECU

Reference

ECM

EC-73, "Reference Value"

EC-87, "Fail-safe"

EC-89, "DTC Inspection Priority Chart"

EC-91, "DTC Index"

IPDM E/R

PCS-12, "Reference Value"

PCS-19, "Fail Safe"

PCS-20, "DTC Index"

BCM

BCS-30, "Reference Value"

BCS-50, "Fail Safe"

BCS-50, "DTC Inspection Priority Chart"

BCS-52, "DTC Index"