Nissan Leaf. Manual — part 829
B27A0, B27A1 INTAKE DOOR MOTOR
HAC-319
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Component Inspection (Motor)
INFOID:0000000010122029
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-362, "INTAKE DOOR MOTOR : Removal and Installa-
.
Terminal
Operation direction
+
−
5
6
REC
6
5
FRE
HAC-320
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
DTC Logic
INFOID:0000000010122030
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-320, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122031
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
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
HAC-321
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check A/C relay circuit. Refer to
EVC-385, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> Repair harness or connector between A/C relay and air mix door motor.
NO
>> Repair or replace malfunctioning components.
3.
CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between air mix 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 AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between air mix 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 AIR MIX DOOR MOTOR
Check air mix door motor. Refer to
HAC-321, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-347, "Removal and Installation"
.
NO
>> Replace air mix door motor. Refer to
HAC-363, "AIR MIX DOOR MOTOR : Removal and Installa-
.
Component Inspection
INFOID:0000000010122032
1.
CHECK AIR MIX DOOR MOTOR
1. Remove air mix door motor. Refer to
HAC-363, "AIR MIX DOOR MOTOR : Removal and Installation"
.
2. Check resistance between air mix door motor terminals. Refer to applicable table for the normal value.
Air mix door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M146
6
M55
6
Yes
5
7
2
8
1
9
Air mix door motor
—
Continuity
Connector
Terminal
M146
6
Ground
No
5
2
1
Terminal
Resistance (
Ω)
(Approx.)
4
1
90
2
5
6
HAC-322
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace air mix door motor. Refer to
HAC-363, "AIR MIX DOOR MOTOR : Removal and Installa-
.
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