Nissan Rogue. Instruction — 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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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 (instruction)
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
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
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000011276634
Regarding Wiring Diagram information, refer to
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
(U1010).
Is any DTC No. displayed?
YES
>> Perform diagnosis for the applicable DTC. Refer to
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
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