Nissan Altima HL32 Hybrid. Manual - part 659

 

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Nissan Altima HL32 Hybrid. Manual - part 659

 

 

P0A94-550

HBC-385

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

• 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 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.

HBC-386

< COMPONENT DIAGNOSIS >

P0A94-553

P0A94-553

Description

INFOID:0000000004212020

The boost converter boosts the 244.8 V DC from the HV battery to a maximum of approximately 650 V DC.

The inverter converts the voltage that has been boosted by the boost converter into alternating current, which

is used for driving MG2 and MG1. When MG1 and MG2 operate as a generator, the alternating-current voltage

from MG1 and MG2 is converted into direct-current voltage by the inverter.

Then the boost converter drops this voltage to a direct-current voltage rating of 244.8 V in order to charge the

HV battery.

The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before

it is boosted. It also uses a voltage sensor (VH) that is built into the inverter to detect the high voltage after it is

boosted. Based on the voltage before and after it is boosted, the hybrid vehicle control ECU controls the oper-

ation of the boost converter to boost the voltage to the target voltage.

DTC Logic

INFOID:0000000004212021

DTC DETECTION LOGIC

If the boost converter (inverter with converter assembly) overheats, it will transmit a boost converter fail signal

to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU will illuminate the MIL and set a

DTC.

JMCIA0102GB

DTC No.

INF code

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0A94

553

DC/DC Converter 
Performance

Boost converter fail signal detection 
(boost converter overheating)

• Wire harness or connector
• Inverter cooling system
• Water pump with motor & bracket assembly
• Hybrid transaxle
• Inverter with converter assembly
• Fuel  level
• Engine assembly
• Cooling fan system

P0A94-553

HBC-387

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

Diagnosis Procedure

INFOID:0000000004212022

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:

P0A94-553 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 AMOUNT OF GASOLINE

See 

HBC-303, "Diagnosis Procedure"

.

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/Performance

P0A78-266, 267, 523, 586, 284, 505, 287, 506, 113, 
286, 503, 279, 504, 306, 806, 807, 808, 128

Drive Motor “A” Inverter Performance

P0A94-585, 587, 589, 590, 554, 555, 556, 547, 548, 
549, 442

DC/DC Converter Performance

P0A7A-322, 517, 325, 518, 122, 324, 344, 809, 810, 
811, 130

Generator Inverter Performance

P0A92-521

Hybrid Generator Performance

P0A90-509

Drive Motor “A” Performance

P0AA6-526

Hybrid Battery Voltage System Isolation Fault

P0AA6-613

Hybrid Battery Voltage Isolation Sensor Circuit

HBC-388

< COMPONENT DIAGNOSIS >

P0A94-553

OK or NG

OK

>> GO TO 4.

NG

>> Refuel vehicle.

4.

CHECK ENGINE START

See 

HBC-303, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 5.

5.

INSPECT CRANKSHAFT PULLEY REVOLUTION (P POSITION)

See 

HBC-303, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

INSPECT CRANKSHAFT PULLEY REVOLUTION (N POSITION)

See 

HBC-303, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

NG

>> Repair or replace engine assembly.

7.

CHECK QUANTITY OF INVERTER COOLANT

See 

HBC-362, "Diagnosis Procedure"

.

A or B or C

A

>> GO  TO  8.

B

>> Add coolant.

C

>> Check for coolant leaks and add coolant.

8.

CHECK COOLANT HOSE

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 9.

NG

>> Correct the problem.

9.

CHECK FUSE (NO. 67)

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace fuse.

10.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

See 

HBC-109, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 11.

NG

>> Connect securely.

11.

CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR & BRACKET AS-

SEMBLY CONNECTOR)
See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 12.

NG

>> Connect securely.

12.

PERFORM ACTIVE TEST BY CONSULT-III (INV WATER PUMP)

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

 

 

 

 

 

 

 

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