Nissan Altima HL32 Hybrid. Manual - part 665

P0AA1-231

HBC-409

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

JMCIA0198GB

HBC-410

< COMPONENT DIAGNOSIS >

P0AA1-231

DTC Logic

INFOID:0000000004212042

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004212043

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.

• If P0AA1-231 is output, the vehicle is prevented from starting.

JMCIA0125GB

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0AA1

231

Hybrid Battery Positive Contac-
tor Circuit Stuck Closed

System main relay B on the HV 
battery positive side is stuck 
closed.

• HV relay assembly
• Inverter with converter assembly

P0AA1-231

HBC-411

< 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.

Is DTC detected?

YES

>> Go to Diagnosis Procedure relevant to output DTC.

NO

>> GO TO 3.

3.

CHECK FREEZE FRAME DATA

1. Turn ignition switch ON.

2. Read output DTCs.

3. Read the freeze frame data of P0AA1-231.

A or B

A

>> Replace inverter with converter assembly (See 

HBC-638, "Removal and Installation"

).

B

>> GO TO 4.

4.

CHECK HV RELAY ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.

1.  Turn ignition switch OFF and remove the service plug grip (See 

HBC-632, "Precautions for Inspecting the

Hybrid Control System"

).

NOTE:

• After removing the service plug grip, do not turn ignition switch ON (READY), unless instructed by the

service manual because this may cause a malfunction.

• For the removal and installation procedures related to inspection of the HV relay assembly, (See 

HBB-

105, "Removal and Installation"

).

2. Measure the resistance according to the value(s) in the table

below. 

NOTE:

• Leave the HV relay in the vehicle while testing to prevent the

movement that occurs during removal from causing a stuck

relay to return to normal.

• If the result of reading the freeze frame data is B, the HV relay assembly must be replaced. Measuring

resistance can determine that this is either a present or past malfunction.

OK or NG

OK

>> Replace inverter with converter assembly (See 

HBC-638, "Removal and Installation"

).

DTC No.

Relevant Part

P0AE2-773, 161

SMRP short

P0ADC-226 

SMRB control line

P0A1A-156, 658, 659, 151, 155, P0A1B-511, 164, 163, 512, 193, 
786, 788, 661,P0A78-266, 267, 523, 586, P0A94-442, P3004-132

VH sensor circuit

P0A1A-200, 791, 792, 793, P0A1B-192, 168, 794, 795, 796, 
P0A3F-243,P0A41-245, P0A40-500, P0A4B-253, P0A4C-513, 
P0A4D-255

MG1 and MG2 rotation speed circuit

Result

Proceed to

Boost converter voltage (VL) is less than 60 V.

A

Boost converter voltage (VL) is 60 V or more.

B

HV Relay Assembly

HV Relay Assembly

Resistance

Component 

connector

Terminal

Component 

connector

Terminal

E308

21

s1

1

10 k

Ω or higher

JMCIA0199GB

HBC-412

< COMPONENT DIAGNOSIS >

P0AA1-231

NG

>> Replace HV relay assembly (See 

HBB-105, "Removal and Installation"

).