Nissan Leaf. Manual — part 775
B2772 PTC HEATER
HAC-103
< 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
B2772 PTC HEATER
DTC Logic
INFOID:0000000010121813
DTC DETECTION LOGIC
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-103, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121814
1.
REPLACE PTC HEATER
Replace PTC heater. Refer to
HAC-201, "Removal and Installation"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B2772
PTC HEATER VOLTAGE
When the supply voltage input to the PTC heat-
er is the specified voltage value or less.
• PTC heater
• High voltage harness or connectors
(PTC heater high voltage circuit is
open or shorted.)
HAC-104
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B2777, B2779, B277B PTC HEATER
B2777, B2779, B277B PTC HEATER
DTC Logic
INFOID:0000000010121815
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch OFF.
2. Set the vehicle to READY.
3. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
4. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-104, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121816
Regarding Wiring Diagram information, refer to
1.
CHECK PTC HEATER COMMUNICATION LINE FOR OPEN
1. Turn power switch OFF.
2. Disconnect PTC heater and A/C auto amp. connector.
3. Check continuity between PTC heater harness connector and A/C auto amp harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK PTC HEATER COMMUNICATION LINE FOR SHORT
Check continuity between PTC heater harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B2777
PTC HEATER LIN COMMU-
NICATION
When there is an error in the signal sent from
the PTC heater.
• PTC heater
• A/C auto amp.
• Harness or connectors
(PTC heater circuit is open or short-
ed.)
B2779
PTC HEATER COMMUNI-
CATION
When there is an error in the signal sent from
the A/C auto amp. or there is an error in the sig-
nal received by the PTC heater.
B277B
HVAC LIN COMMUNICA-
TION
When there is an error in the signal send from
the A/C auto amp.
PTC heater
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M145
4
M55
40
Yes
PTC heater
−
Continuity
Connector
Terminal
M145
4
Ground
No
B2777, B2779, B277B PTC HEATER
HAC-105
< 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
3.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning components.
4.
CHECK A/C AUTO AMP.
With CONSULT
1. Set the vehicle to READY.
2. Using CONSULT, perform “MODE6” of “HVAC TEST” in “Active Test” of HVAC”. Refer to
.
3. Check that the PTC heater operates normally.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace A/C auto amp. (Refer to
HAC-187, "Removal and Installation"
). Then GO TO 5.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC confirmation procedure. Refer to
.
Is DTC B2777, B2779 or B277B detected?
YES
>> Replace PTC heater. Refer to
HAC-201, "Removal and Installation"
.
NO
>> Inspection End.
HAC-106
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27A0, B27A1 INTAKE DOOR MOTOR
B27A0, B27A1 INTAKE DOOR MOTOR
DTC Logic
INFOID:0000000010121817
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.
.
*: A/C auto amp. operates intake door motor according to target value of PBR opening angle at 40% when per-
forming self-diagnosis.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Set the vehicle to READY.
2. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
3. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-106, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121818
Regarding Wiring Diagram information, refer to
1.
CHECK INTAKE DOOR MOTOR OPERATION
1. Turn power switch ON.
2. Operate intake switch and check by operation sound that intake door motor operates.
Does the intake door motor operate?
YES
>> GO TO 2.
NO
>> GO TO 8.
2.
CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY
1. Disconnect intake door motor connector.
2. Turn power switch ON.
3. Check voltage between intake door motor harness connector and ground.
Is the inspection result normal?
DTC
Items
(CONSULT screen terms)
DTC detection condition
*
Possible cause
B27A0
INTAKE DOOR MOTOR
PBR opening angle of intake door motor is 50%
or more. (PBR feedback signal voltage of intake
door motor is 2.5 V or more).
• Intake door motor
• Intake door motor system installa-
tion condition
• A/C auto amp.
• Harness or connectors
(The motor circuit is open or short-
ed.)
B27A1
PBR opening angle of intake door motor is 30%
or less. (PBR feedback signal voltage of intake
door motor is 1.5 V or less).
+
−
Voltage
(Approx.)
Intake door motor
Connector
Terminal
M54
1
Ground
5 V
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