Nissan Leaf. Manual — part 776
B27A0, B27A1 INTAKE DOOR MOTOR
HAC-107
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> GO TO 3.
NO
>> GO TO 7.
3.
CHECK INTAKE DOOR MOTOR PBR GROUND CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between intake door motor 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 DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN
Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTAKE DOOR MOTOR PBR
Check intake door motor PBR. Refer to
HAC-108, "Component Inspection (PBR)"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
NO
>> Replace intake door motor. Refer to
HAC-204, "INTAKE DOOR MOTOR : Removal and Installa-
.
7.
CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
NO
>> Repair harness or connector.
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M54
3
M55
30
Yes
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M54
2
M55
38
Yes
Intake door motor
—
Continuity
Connector
Terminal
M54
2
Ground
No
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M54
1
M55
27
Yes
HAC-108
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27A0, B27A1 INTAKE DOOR MOTOR
8.
CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Disconnect intake door motor connector, and A/C auto amp. connector.
3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair harness or connector.
9.
CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
10.
CHECK INTAKE DOOR MOTOR
1. Turn power switch OFF.
2. Check intake door motor. Refer to
HAC-109, "Component Inspection (Motor)"
.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace intake door motor. Refer to
HAC-204, "INTAKE DOOR MOTOR : Removal and Installa-
.
11.
CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM
Check intake door motor system is properly installed. Refer to
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning components.
Component Inspection (PBR)
INFOID:0000000010121819
1.
CHECK INTAKE DOOR MOTOR PBR
Check resistance between intake door motor terminals.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake door motor. Refer to
HAC-204, "INTAKE DOOR MOTOR : Removal and Installa-
.
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M54
5
M55
21
Yes
6
1
Intake door motor
—
Continuity
Connector
Terminal
M54
5
Ground
No
6
Terminal
Resistance (
Ω)
1
2
Except 0 or
∞
3
B27A0, B27A1 INTAKE DOOR MOTOR
HAC-109
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Component Inspection (Motor)
INFOID:0000000010121820
1.
CHECK INTAKE DOOR MOTOR
Supply intake door motor terminals with battery voltage and check by visually and operation sound that intake
door motor operates.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake door motor. Refer to
HAC-204, "INTAKE DOOR MOTOR : Removal and Installa-
.
Terminal
Operation direction
+
−
5
6
REC
6
5
FRE
HAC-110
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
DTC Logic
INFOID:0000000010121821
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010.
.
• If air mix door motors DTC (B27A2 – B27A5) are detected, there is probably a disconnected connector or an
open circuit in air mix door motor drive power supply harness.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch ON.
2. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
3. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-110, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121822
Regarding Wiring Diagram information, refer to
1.
CHECK AIR MIX DOOR MOTOR POWER SUPPLY
1. Turn power switch OFF.
2. Disconnect air mix door motor connector.
3. Turn power switch ON.
4. Check voltage between air mix door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK A/C RELAY CIRCUIT
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27A2
AIR MIX DOOR MOTOR
Short or open circuit of air mix door motor drive
signal terminal 1.
• Air mix door motor
• A/C auto amp.
• Harness or connectors
(The motor circuit is open or short-
ed.)
B27A3
Short or open circuit of air mix door motor drive
signal terminal 2.
B27A4
Short or open circuit of air mix door motor drive
signal terminal 3.
B27A5
Short or open circuit of air mix door motor drive
signal terminal 4.
+
−
Voltage
(Approx.)
Air mix door motor
Connector
Terminal
M146
4
Ground
Battery voltage
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