Nissan Rogue. Manual - part 766

HAC-86

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B24C6 BLOWER MOTOR CONTROL

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK FRONT BLOWER RELAY

1. Turn ignition switch OFF.

2. Check front blower relay. Refer to 

HAC-88, "Component Inspection (Front Blower Relay)"

.

Is the inspection result normal?

YES

>> Repair harness or connector between variable blower control and fuse.

NO

>> Replace front blower relay.

4.

CHECK FRONT BLOWER MOTOR POWER SUPPLY

1. Connect variable blower control connector. 

2. Disconnect front blower motor connector. 

3. Turn ignition switch ON.

4. Check voltage between front blower motor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace variable blower control. Refer to 

HAC-112, "Removal and Installation"

.

5.

CHECK FRONT BLOWER MOTOR CONTROL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect variable blower control connector.

3. Check continuity between variable blower control harness connector and front blower motor harness con-

nector. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK FRONT BLOWER MOTOR OPERATION

Check front blower motor operation. Refer to 

HAC-88, "Component Inspection (Front Blower Motor)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace front blower motor. Refer to 

VTL-16, "Removal and Installation"

.

7.

CHECK VARIABLE BLOWER CONTROL GROUND CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Check continuity between variable blower control harness connector and ground. 

+

−

Voltage

(Approx.)

Variable blower control

Connector

Terminal

M133

4

Ground

Battery voltage

+

−

Voltage

(Approx.)

Front blower motor

Connector

Terminal

M144

1

Ground

Battery voltage

Variable blower control

Front blower motor

Continuity

Connector

Terminal

Connector

Terminal

M134

6

M144

2

Yes

B24C6 BLOWER MOTOR CONTROL

HAC-87

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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HAC

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

CHECK VARIABLE BLOWER CONTROL SIGNAL

1. Connect variable blower control connector and A/C auto amp. connector. 

2. Turn ignition switch ON.

3. Set air outlet to VENT. 

4. Change fan speed from 1st – 7th, and check duty ratios between variable blower control harness connec-

tor and ground by using an oscilloscope. 

NOTE:

Calculate the drive signal duty ratio as shown in the figure.

T2 = Approx. 1.6 ms

Is the inspection result normal?

YES

>> Replace variable blower control. Refer to 

HAC-112, "Removal and Installation"

.

NO

>> GO TO 9.

9.

CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect variable blower control connector and A/C auto amp. connector.

3. Check continuity between variable blower control harness connector and A/C auto amp. harness connec-

tor. 

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair harness or connector.

10.

CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT FOR SHORT

Check continuity between variable blower control harness connector and ground. 

Variable blower control

—

Continuity

Connector

Terminal

M133

2

Ground

Yes

+

−

Condition

Duty ratio

(Approx.)

Output waveform

Variable blower control

Connector

Terminal

Fan speed (manual) 

Air outlet: VENT

M133

3

Ground

1st

25%

2nd

35%

3rd

47%

4th

57%

5th

69%

6th

79%

7th

91%

JPIIA1646GB

Variable blower control

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M133

3

M55

74

Yes

Variable blower control

—

Continuity

Connector

Terminal

M133

3

Ground

No

HAC-88

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B24C6 BLOWER MOTOR CONTROL

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-103, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection (Front Blower Motor)

INFOID:0000000011276631

1.

CHECK BLOWER MOTOR

1. Connect battery voltage to terminal 1 of blower motor.

2. Connect ground to terminal 2 of blower motor.
Does the blower fan operate?

YES

>> Intermittent incident. Refer to 

GI-44, "Intermittent Incident"

.

NO

>> Replace blower motor. Refer to 

VTL-16, "Removal and Installation"

.

Component Inspection (Front Blower Relay)

INFOID:0000000011276632

1.

CHECK FRONT BLOWER RELAY

1. Remove front blower relay. Refer to 

PG-64, "Terminal Arrangement"

. 

2. Check continuity between blower relay terminal 3 and 5 when

the voltage is supplied between terminal 1 and 2. 

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace front blower relay.

Terminal

Voltage

Continuity

3

5

ON

Yes

OFF

No

JSIIA1551ZZ

B24D4 A/C CONTROL COMMUNICATION

HAC-89

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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B24D4 A/C CONTROL COMMUNICATION

DTC Logic

INFOID:0000000011276633

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Perform “Self Diagnostic Result” of “HVAC”. 

3. Check if any DTC No. is displayed in the self-diagnosis results. 
Is DTC detected?

YES

>> Refer to 

HAC-89, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000011276634

Regarding Wiring Diagram information, refer to 

HAC-35, "Wiring Diagram"

.

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

1. Using CONSULT, perform “Self Diagnostic Result” of “HVAC”. 

2. Check if any DTC No. is displayed in the self-diagnosis results. 

NOTE:

If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

53, "DTC Logic"

 (U1000) or 

HAC-54, "DTC Logic"

 (U1010). 

Is any DTC No. displayed?

YES

>> Perform diagnosis for the applicable DTC. Refer to 

HAC-33, "DTC Index"

. 

NO

>> GO TO 2.

2.

CHECK A/C SWITCH COMMUNICATION CIRCUIT CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect the A/C switch and the A/C auto amp. connectors.

3. Check continuity between A/C switch harness connector and A/C auto amp. harness connector. 

4. Check continuity between A/C switch harness connector and ground. 

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B24D4

A/C CONTROL COMM

When A/C auto amp. is not transmitting 
or receiving communication signal for 2 
or more seconds.

• A/C switch
• A/C auto amp.
• Harness and connector

(Communication line is open or short-
ed)

A/C switch

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M51

8

M54

33

Yes

A/C switch

—

Continuity

Connector

Terminal

M51

8

Ground

No