Nissan X-Trail 32. Manual - part 1429

U1010 CONTROL UNIT (CAN)

HAC-191

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

U1010 CONTROL UNIT (CAN)

DTC Description

INFOID:0000000010939840

DTC DETECTION LOGIC

POSSIBLE CAUSE

A/C amp. (CAN communication function malfunction)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON and wait for 2 seconds or more. 

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-191, "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:0000000010939841

1.

REPLACE A/C AMP.

Replace A/C amp. Refer to 

HAC-222, "Removal and Installation"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U1010

CONTROL UNIT(CAN)
[CONTROL UNIT(CAN)]

When detecting error during the initial diagnosis of CAN controller of A/C amp.

HAC-192

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

B24A4 INTAKE SENSOR

B24A4 INTAKE SENSOR

DTC Description

INFOID:0000000010939842

DTC DETECTION LOGIC 

POSSIBLE CAUSE

[CIRCUIT SHORT TO GROUND]

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

[CIRC SHORT TO BATT OR OPEN]

• Intake sensor
• A/C 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-192, "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:0000000010939843

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 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)].

B24A4 INTAKE SENSOR

HAC-193

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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 amp. connector. 

3.

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

Connector

Terminal

M132

21

Ground

Sensor detection 
temperature

−

20

°

C (

−

4

°

F)

4.41 V

−

10

°

C (14

°

F)

4.09 V

0

°

C (32

°

F)

3.68 V

10

°

C (50

°

F)

3.21 V

20

°

C (68

°

F)

2.71 V

25

°

C (77

°

F)

2.47 V

30

°

C (86

°

F)

2.23 V

40

°

C (104

°

F)

1.80 V

Intake sensor

A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M175

1

M132

21

Existed

Intake sensor

A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M175

2

M132

18

Existed

Intake sensor

—

Continuity

Connector

Terminal

M175

1

Ground

Not existed

+

−

Voltage

Intake sensor

Connector

Terminal

M175

1

Ground

0 V

HAC-194

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

B24A4 INTAKE SENSOR

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-194, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C amp. Refer to 

HAC-222, "Removal and Installation"

.

NO

>> Replace intake sensor. Refer to 

HAC-224, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-44, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace A/C amp. Refer to 

HAC-222, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection

INFOID:0000000010939844

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

1.

CHECK INTAKE SENSOR

1.

Remove intake sensor. Refer to 

HAC-224, "Removal and Installation"

. 

2.

Check resistance between intake sensor harness connector terminals. Refer to applicable table for the
normal value. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake sensor. Refer to 

HAC-224, "Removal and Installation"

.

Intake sensor

Condition

Resistance: k

Ω

Con-

nector

Terminal

Temperature: 

°

C (

°

F) 

M175

1

2

−

20 (

−

4)

16.00

−

10 (14)

9.62

0 (32) 

6.00

10 (50)

3.87

20 (68)

2.57

25 (77)

2.12

30 (86)

1.76

40 (104)

1.23