Nissan Altima HL32 Hybrid. Manual — part 513
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P0AA6-611 ELECTRIC COMPRESSOR
HAC-73
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
CAUTION:
If the results are out of the specified range, replace the compressor without operating.
Is DTC detected?
YES
>> Replace electric compressor. Refer to
HA-31, "Removal and Installation"
.
NO
>> Replace air conditioning cycle.
Electric compressor
(—)
Resistance (
Ω)
Connector
Terminal
F252
7
Ground
Always
3 M
Ω or higher
8
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HAC-74
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
U0424 ELECTRIC COMPRESSOR
U0424 ELECTRIC COMPRESSOR
Description
INFOID:0000000004215362
The HV ECU and electric compressor transmit information to one another via a communication line. Compres-
sor control is stopped and the DTC is output if communication information is cut off or abnormal information
occurs.The DTC is also detected if high-voltage power supplied from the MG ECU to the compressor control
circuit is shut off.The output DTC is memorized as current trouble.
CAUTION:
• Wear electrically insulated gloves and pull out the service plug grip before inspection as procedures
may require disconnecting high-voltage connectors. Be sure to carry the removed service plug grip
because other workers may install it by mistake.
• Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is
removed.
DTC Logic
INFOID:0000000004215363
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON (READY) and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES
>> Go to Diagnosis Procedure.
NO
>> END.
Diagnosis Procedure
INFOID:0000000004215364
CAUTION:
• Wear electrically insulated gloves and pull out the service plug grip before inspection as procedures
may require disconnecting high-voltage connectors. Be sure to carry the removed service plug grip
because other workers may install it by mistake.
• Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is
removed.
1.
CHECK CAN COMMUNICATION
Use the CONSULT–III to check if the CAN Communication System is functioning normally.
Is DTC detected?
YES
>> Check CAN communication. Refer to
LAN-16, "Trouble Diagnosis Flow Chart"
NO
>> GO TO 2.
2.
CHECK DIAGNOSTIC TROUBLE CODE
DTC No.
Trouble Diagnosis Name
DTC Detecting Condition
Possible Cause
U0424
COMMUNICATION FAILU-
RA
• After READY and A/C ON
• Communication line error or open between
the HV ECU and the electric compressor.
• High-voltage power source is shut off.
• Harness or connector between HV ECU
and electric compressor and ground
• Electric compressor
• HV ECU
• MG ECU
• Electric vehicle fuse
• CAN communication system
• Hybrid control system
![](/vehicles/gon/sttello/nita/wouthou.png)
U0424 ELECTRIC COMPRESSOR
HAC-75
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check if DTCs for the hybrid control system are output using the CONSULT-III.
Is DTC detected?
YES-1 >> Only DTC P3108 is output: GO TO 3.
YES-2 >> DTCs other than P3108 are output: Refer to
NO
>> GO TO 3.
3.
INSPECT FUSE
1. Remove the 10A fuse [No. 3 located in the fuse block (J/B)]. Refer to
2. Measure the resistance according to the value(s) in the table below.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the 10A fuse [No. 3 located in the fuse block (J/B)]. Refer to
4.
CHECK ELECTRIC COMPRESSOR GROUND CIRCUIT
1. Disconnect the electric compressor connector.
CAUTION:
Do not disconnect the connector on the high-voltage side.
2. Measure the resistance according to the value(s) in the table below.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK HARNESS AND CONNECTOR
1. Turn ignition switch ON.
2. Measure the voltage according to the value(s) in the table below.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK HARNESS AND CONNECTOR (HV ECU -ELECTRIC COMPRESSOR)
1. Disconnect the HV ECU connector.
2. Measure the voltage according to the value(s) in the table below.
10A fuse (No. 3)
Condition
Resistance (
Ω)
A
B
Always
Below 1.0
Electric compressor
–
Condition
Resistance (
Ω)
Connector
Terminal
F251
5
Ground
Always
Below 1.0
(+)
(
−)
Condition
Voltage (V)
Electric compressor
Connector
Terminal
Connector
Terminal
F251
6
F251
5
IGN SW: ON (READY)
10 to 14
IGN SW: OFF
Below 1.0
Electric compressor
HV ECU
Condition
Resistance (
Ω)
Connector
Terminal
Connector
Terminal
F251
1
E65
55
Always
Below 1.0
2
54
3
53
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HAC-76
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
U0424 ELECTRIC COMPRESSOR
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
INSPECT ELECTRIC VEHICLE FUSE
1. Turn ignition switch OFF.
2. Remove the service plug grip.
CAUTION:
• Be sure to wear insulated gloves.
• Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip
is removed.
NOTE:
Do not start the engine with the service plug grip removed because it may cause a malfunction.
3. Remove the connector cover assembly.
CAUTION:
Be sure to wear insulated gloves.
NOTE:
Be sure to prevent foreign objects or water from entering the MG ECU.
4. Check that bolts A and B are tightened securely.
5. Measure the resistance according to the value(s) in the table below.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace electric vehicle fuse.
Electric compressor
–
Condition
Resistance (
Ω)
Connector
Terminal
F251
1
Ground
Always
10 k or higher
2
3
JPIIA0313GB
MG ECU
Condition
Resistance (
Ω)
Electric vehicle fuse
A
B
Always
Below 1.0
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