Nissan Altima HL32 Hybrid. Manual — part 650
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P0A7A-810
HBC-349
< COMPONENT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
HBC
N
O
P
Diagnosis Procedure
INFOID:0000000004211986
1.
PRECONDITIONING
• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with
converter assembly, take safety precautions such as wearing insulated gloves and removing the service
plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent
other technicians from accidentally reconnecting it while you are working on the high-voltage system.
• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage
connectors or terminals.
• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with
converter assembly.
>> GO TO 2.
2.
CHECK DTC OUTPUT (HYBRID SYSTEM)
1. Turn ignition switch ON.
2. Check DTC.
NOTE:
P0A7A-810 may be set due to a malfunction which also causes DTCs in the table above to be set. In this
case, first troubleshoot the output DTCs in the table above.
Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
Is DTC detected?
YES
>> Go to Diagnosis Procedure relevant to output DTC.
NO
>> GO TO 3.
3.
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CON-
NECTOR)
HBC-109, "Diagnosis Procedure"
OK or NG
OK
>> Replace inverter with converter assembly (See
HBC-638, "Removal and Installation"
).
NG
>> Connect securely.
DTC No.
Relevant Diagnosis
P0A1D (Except INF code 390)
Hybrid Powertrain Control Module
P0A1A (all INF codes)
Generator Control Module
P0A1B (all INF codes)
Drive Motor “A” Control Module
P0A72 (all INF codes)
Generator Phase V Current
P0A75 (all INF codes)
Generator Phase W Current
P0A60 (all INF codes)
Drive Motor “A” Phase V Current
P0A63 (all INF codes)
Drive Motor “A” Phase W Current
P0A4B-253
Generator Position Sensor Circuit
P0A4D-255
Generator Position Sensor Circuit Low
P0A4C-513
Generator Position Sensor Circuit Range/Performance
P0A3F-243
Drive Motor “A” Position Sensor Circuit
P0A41-245
Drive Motor “A” Position Sensor Circuit Low
P0A40-500
Drive Motor “A” Position Sensor Circuit Range/Perfor-
mance
P0A78-266, 267, 523, 586
Drive Motor “A” Inverter Performance
P0A94-585, 587, 589, 590
DC/DC Converter Performance
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HBC-350
< COMPONENT DIAGNOSIS >
P0A90-251
P0A90-251
Description
INFOID:0000000004211987
When three-phase alternating current flows through the three-phase windings of the stator coil, a rotating
magnetic field is generated in MG2. The system controls the rotation of the magnetic field in accordance with
the rotating position and speed of the rotor. As a result, the permanent magnets provided in the rotor are
pulled in the direction of rotation, generating torque. The generated torque is almost proportional to the
amount of current. The system controls MG2 speed by regulating the frequency of the alternating current. Fur-
thermore, the system properly controls the rotating magnetic field and the angle of the rotor magnets in order
to generate high torque in an efficient manner, even at high speeds.
DTC Logic
INFOID:0000000004211988
DTC DETECTION LOGIC
The MG ECU monitors MG2. If the MG ECU detects a reduction in the magnetic force of MG2 or an inphase
short, it interprets this as an MG2 failure. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.
Diagnosis Procedure
INFOID:0000000004211989
1.
PRECONDITIONING
• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with
converter assembly, take safety precautions such as wearing insulated gloves and removing the service
plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent
other technicians from accidentally reconnecting it while you are working on the high-voltage system.
• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage
connectors or terminals.
• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with
converter assembly.
JMCIA0101GB
DTC No.
INF code
Trouble diagnosis name
DTC detecting condition
Possible cause
P0A90
251
Drive Motor “A” Performance
Motor magnetic force deterioration
or same phase short circuit
Hybrid transaxle
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P0A90-251
HBC-351
< COMPONENT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
HBC
N
O
P
>> GO TO 2.
2.
CHECK DTC OUTPUT (HYBRID SYSTEM)
1. Turn ignition switch ON.
2. Check DTC.
NOTE:
P0A90-251 may be set due to a malfunction which also causes DTCs in the table above to be set. In this
case, first troubleshoot the output DTCs in the table above.
Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
Is DTC detected?
YES
>> Go to Diagnosis Procedure relevant to output DTC.
NO
>> GO TO 3.
3.
SIMULATION TEST
1. Test-drive the vehicle at a speed of 40 km/h for approximately 1 minute.
2. Check DTC.
A or B
A
>> Go to Diagnosis Procedure relevant to output DTC.
B
>> GO TO 4.
4.
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CON-
NECTOR)
HBC-109, "Diagnosis Procedure"
OK or NG
OK
>> GO TO 5.
NG
>> Connect securely.
5.
CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
HBC-177, "Diagnosis Procedure"
OK or NG
OK
>> Replace hybrid transaxle (See
TM-36, "Removal and Installation"
DTC No.
Relevant Diagnosis
P0A1A (all INF codes), P0A1B (all INF codes)
MG ECU circuit malfunction
P0A1D (Except INF code 390)
Hybrid Powertrain Control Module
P0A3F-243, P0A40-500, P0A41-245
Motor resolver circuit malfunction
P0A4B-253, P0A4C-513, P0A4D-255
Generator resolver circuit malfunction
P0A51-174
MG ECU circuit malfunction
P0A60 (all INF codes), P0A63 (all INF codes)
Motor current sensor circuit
P0A72 (all INF codes), P0A75 (all INF codes)
Generator current sensor circuit
P0A78-306, 510, 586, 266, 267, 523
Motor inverter malfunction
P0A7A-344, 522
Generator inverter malfunction
P0A90-509
MG2 malfunction
P0A92-521
MG1 malfunction
P0A94-585, 587, 589, 590
Boost converter circuit
P0AA6 (all INF codes)
Hybrid Battery Voltage System Isolation Fault
P3004-132
Power Cable Malfunction
P3233-750
HV gate shutdown wiring malfunction
DTC output
Proceed to
P0A78-306 or P0A90-509 is output
A
P0A90-251 is output or no DTC is output
B
HBC-352
< COMPONENT DIAGNOSIS >
P0A90-251
NG
>> Tighten to specified torque.
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