Nissan Leaf. Manual — part 830
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
HAC-323
< 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
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
DTC Logic
INFOID:0000000010122033
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 mode door motors DTC (B27A6 – B27A9) are detected, there is probably a disconnected connector or an
open circuit in mode 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-323, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122034
Regarding Wiring Diagram information, refer to
1.
CHECK MODE DOOR MOTOR POWER SUPPLY
1. Turn power switch OFF.
2. Disconnect mode door motor connector.
3. Turn power switch ON.
4. Check voltage between mode 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
B27A6
MODE DOOR MOTOR
Short or open circuit of mode door motor drive
signal terminal 1.
• Mode door motor
• A/C auto amp.
• Harness or connectors
(The motor circuit is open or short-
ed.)
B27A7
Short or open circuit of mode door motor drive
signal terminal 2.
B27A8
Short or open circuit of mode door motor drive
signal terminal 3.
B27A9
Short or open circuit of mode door motor drive
signal terminal 4.
+
−
Voltage
(Approx.)
Mode door motor
Connector
Terminal
M142
4
Ground
Battery voltage
HAC-324
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
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 mode door motor.
NO
>> Repair or replace malfunctioning components.
3.
CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between mode 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 MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between mode 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 MODE DOOR MOTOR
Check mode door motor. Refer to
HAC-324, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-347, "Removal and Installation"
.
NO
>> Replace mode door motor. Refer to
HAC-363, "MODE DOOR MOTOR : Removal and Installa-
.
Component Inspection
INFOID:0000000010122035
1.
CHECK MODE DOOR MOTOR
1. Remove mode door motor. Refer to
HAC-363, "MODE DOOR MOTOR : Removal and Installation"
2. Check resistance between mode door motor terminals. Refer to applicable table for the normal value.
Mode door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M142
6
M55
2
Yes
5
3
2
4
1
5
Mode door motor
—
Continuity
Connector
Terminal
M142
6
Ground
No
5
2
1
Terminal
Resistance (
Ω)
(Approx.)
4
1
90
2
5
6
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
HAC-325
< 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
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace mode door motor. Refer to
HAC-363, "MODE DOOR MOTOR : Removal and Installa-
.
HAC-326
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B27C2, B27C3 PTC HEATER OUTLET AIR TEMPERATURE SENSOR
B27C2, B27C3 PTC HEATER OUTLET AIR TEMPERATURE SENSOR
DTC Logic
INFOID:0000000010122036
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.
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch OFF.
2. Set the vehicle to READY.
3. Operate the automatic air conditioning system.
4. Set the temperature to full hot and wait at least 2 seconds.
5. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
6. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-148, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122037
Regarding Wiring Diagram information, refer to
1.
CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR VOLTAGE SIGNAL
1. Turn power switch ON.
2. Operate the automatic air conditioning system.
3. Check voltage between A/C auto amp. harness connector terminals.
Is the inspection result normal?
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27C2
PTC OUT AIR TEMP SENS
The PTC heater outlet air temperature sensor
recognition temperature is too low [less than
−
42
°C (−44°F)].
• PTC heater outlet air temperature
sensor
• A/C auto amp.
• Harness or connectors
(The sensor circuit is open or short-
ed.)
B27C3
The PTC heater outlet air temperature sensor
recognition temperature is too high [more than
200
°C (392°F)].
A/C auto amp.
Test condition
Voltage signal
connector
+
−
Terminal
M55
17
10
• Power switch ON
• When air conditioner is op-
erating
JSIIA1778ZZ
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