Nissan Leaf. Manual — part 823
B2777, B2779, B277B PTC HEATER
HAC-295
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
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HAC
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B2777, B2779, B277B PTC HEATER
DTC Logic
INFOID:0000000010122002
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-295, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122003
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
HAC-296
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B2777, B2779, B277B PTC HEATER
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-347, "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-359, "Removal and Installation"
.
NO
>> Inspection End.
B2780 ELECTRIC COMPRESSOR
HAC-297
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
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HAC
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B2780 ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010122004
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 cold 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-297, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122005
1.
REPLACE ELECTRIC COMPRESSOR
Replace electric compressor. Refer to
HA-95, "Removal and Installation"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B2780
COMPRESSOR
ROM,RAM,AD
• When an error is detected in the ROM and
RAM area data.
• When an error is detected in the AD value
(circuit that converts the analog value to a
digital value).
Electric compressor
HAC-298
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B2781 ELECTRIC COMPRESSOR
B2781 ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010122006
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 cold 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-298, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122007
1.
REPLACE ELECTRIC COMPRESSOR
Replace electric compressor. Refer to
HA-95, "Removal and Installation"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B2781
COMP IPM TEMP SENSOR
IPM temp sensor is open or shorted.
Electric compressor
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