Nissan X-Trail 32. Manual - part 1401

B24A0 A/C AUTO AMP.

HAC-79

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B24A0 A/C AUTO AMP.

DTC Description

INFOID:0000000010939734

DTC DETECTION LOGIC

POSSIBLE CAUSE

A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON. 

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT. 

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-79, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010939735

1.

REPLACE A/C AUTO AMP.

Replace A/C auto amp. Refer to 

HAC-126, "Removal and Installation"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A0

A/C AUTO AMP.
(Air conditioning automatic amplifier)

[INTERNAL ELECTRONIC ERROR]

A malfunction is detected in A/C auto amp. 
internal EEPROM memory functions.

HAC-80

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B24A1 A/C AUTO AMP. POWER SUPPLY

B24A1 A/C AUTO AMP. POWER SUPPLY

DTC Description

INFOID:0000000010939736

DTC DETECTION LOGIC

POSSIBLE CAUSE

• A/C auto amp.
• Harness or connector (Accessory power supply circuits is open or shorted.)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON. 

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT. 

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-80, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010939737

1.

CHECK A/C AUTO AMP. POWER SUPPLY AND GROUND CIRCUITS

Check A/C auto amp. power supply and ground circuits. Refer to 

HAC-105, "A/C AUTO AMP. : Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-126, "Removal and Installation"

.

YES

>> Repair or replace malfunctioning parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A1

A/C AUTO AMP. POWER SUPPLY
(Air conditioning automatic amplifier 
power supply)

[CIRC VOLT BELOW THRESHOLD]

The accessory power voltage that is trans-
mitted to A/C auto amp. is 10.5 V or less for 
30 seconds or more.

B24A4 INTAKE SENSOR

HAC-81

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B24A4 INTAKE SENSOR

DTC Description

INFOID:0000000010939738

DTC DETECTION LOGIC 

POSSIBLE CAUSE

[CIRCUIT SHORT TO GROUND]

• Intake sensor
• A/C auto amp.
• Harness or connectors (The sensor circuit is shorted to ground.)

[CIRC SHORT TO BATT OR OPEN]

• Intake sensor
• A/C auto amp.
• Harness or connectors (The sensor circuit is open or shorted to battery.)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-81, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010939739

NOTE:
The intake sensor cannot be reused. If the intake sensor harness connector is disconnected, sensor must be
replaced.

1.

CHECK INTAKE SENSOR SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between A/C auto amp. harness connector and ground

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A4

INTAKE SENSOR
(Intake sensor)

[CIRCUIT SHORT TO GROUND]

The intake sensor recognition temperature is 
too low [less than 

−

44

°

C (

−

47

°

F)].

[CIRC SHORT TO BATT OR OPEN]

The intake sensor recognition temperature is 
too high [more than 100

°

C (212

°

F)].

HAC-82

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B24A4 INTAKE SENSOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

Check continuity between intake sensor harness connector and A/C auto amp. harness connector. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR GROUND CIRCUIT FOR OPEN

1.

Check continuity between intake sensor harness connector and A/C auto amp harness connector. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

1.

Check continuity between intake sensor harness connector and ground. 

2.

Check voltage between intake harness connector and ground

+

−

Condition

Voltage

A/C auto amp.

Connector

Terminal

M173

38

Ground

Sensor detection 
temperature

−

20

°

C (

−

4

°

F)

3.62 V

−

10

°

C (14

°

F)

3.05 V

0

°

C (32

°

F)

2.46 V

10

°

C (50

°

F)

1.92 V

20

°

C (68

°

F)

1.46 V

25

°

C (77

°

F)

1.26 V

30

°

C (86

°

F)

1.09 V

40

°

C (104

°

F)

0.82 V

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M175

1

M173

38

Existed

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M175

2

M173

35

Existed

Intake sensor

—

Continuity

Connector

Terminal

M175

1

Ground

Not existed

+

−

Voltage

Intake sensor

Connector

Terminal

M175

1

Ground

0 V