Nissan Altima HL32 Hybrid. Manual - part 649

P0A7A-809, P0A7A-811

HBC-345

< COMPONENT DIAGNOSIS >

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See 

HBC-109, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 4.

NG

>> Connect securely.

4.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLV-

ER)

See 

HBC-171, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness or connector.

5.

CHECK MOTOR RESOLVER

See 

HBC-171, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 12.

6.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RE-

SOLVER)

See 

HBC-164, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace harness or connector.

7.

CHECK GENERATOR RESOLVER

See 

HBC-164, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 13.

8.

CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)

See 

HBC-177, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 9.

NG

>> Tighten to specified torque.

9.

CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)

See 

HBC-177, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 10.

NG

>> Tighten to specified torque.

10.

INSPECT HYBRID TRANSAXLE (MG2)

See 

HBC-177, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 11.

NG

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

11.

INSPECT HYBRID TRANSAXLE (MG1)

See 

HBC-177, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace inverter with converter assembly (See 

HBC-638, "Removal and Installation"

).

NG

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

12.

CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

HBC-346

< COMPONENT DIAGNOSIS >

P0A7A-809, P0A7A-811

See 

HBC-171, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 14.

NG

>> Connect securely.

13.

CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

See 

HBC-164, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 15.

NG

>> Connect securely.

14.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RE-

SOLVER)
See 

HBC-171, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

NG

>> Repair or replace harness or connector.

15.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR

RESOLVER)
See 

HBC-164, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

NG

>> Repair or replace harness or connector.

P0A7A-810

HBC-347

< COMPONENT DIAGNOSIS >

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P0A7A-810

Description

INFOID:0000000004211984

The inverter converts high-voltage direct current from the HV battery and alternating current for MG2 and

MG1. The inverter contains a three-phase bridge circuit, which consists of six power transistors each for MG2

and MG1, that converts direct current to three-phase alternating current. The MG ECU controls the actuation

of the power transistors. The inverter transmits information that is necessary for effecting control, such as the

amperage and voltage, to the MG ECU.

The MG ECU uses a voltage sensor, which is built into the inverter, to detect boosted high voltage to allow

control of the voltage boost.

The inverter voltage sensor outputs voltage that varies between 0 and 5 V in accordance with the changes in

the high voltage. The higher the high voltage, the higher the output voltage, and the lower the high voltage, the

lower the output voltage.

HBC-348

< COMPONENT DIAGNOSIS >

P0A7A-810

The MG ECU monitors the inverter voltage and detects malfunctions.

DTC Logic

INFOID:0000000004211985

DTC DETECTION LOGIC

If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a sig-

nal to inform the hybrid vehicle control ECU of the malfunction.

If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the

hybrid vehicle control ECU will illuminate the MIL and set a DTC.

JMCIA0099GB

DTC No.

INF Code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0A7A

810

Generator Inverter Performance

Abnormal generator current value 
detection (inverter malfunction)

Inverter with converter assembly