Nissan Altima HL32 Hybrid. Manual - part 650

P0A7A-810

HBC-349

< COMPONENT DIAGNOSIS >

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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)

See 

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

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

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)

See 

HBC-109, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 5.

NG

>> Connect securely.

5.

CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)

See 

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.