Nissan Altima HL32 Hybrid. Manual - part 553

 

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Nissan Altima HL32 Hybrid. Manual - part 553

 

 

P0ABF-123, P0AC1-123, P0AC2-123

HBB-69

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBB

N

O

P

1. Connect the HV relay assembly (battery current sensor) connector.

2. Turn ignition switch ON.

3. Measure the voltage according to the value(s) in the table below.

NOTE:

If igniting switch is turned ON with the service plug grip

removed, DTC P0A0D-350 for the interlock switch system will

be set.

OK or NG

OK

>> Replace battery smart unit. (Refer to 

HBB-101, "Removal and Installation"

).

NG

>> Replace HV relay assembly. (Refer to 

HBB-105, "Removal and Installation"

).

Battery smart unit

Battery smart unit

Voltage

Connector

Terminal

Connector

Terminal

IB

GIB

2.46 to 2.54V

JMCIA0118GB

HBB-70

< COMPONENT DIAGNOSIS >

P0AC0-123

P0AC0-123

Description

INFOID:0000000004212282

The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amper-

age that flows to and from the HV battery. The battery smart unit receives a voltage of between 0 and 5 V that

is in proportion to the amperage flowing in the cable. This voltage goes into the IB terminal from the battery

current sensor. A battery current sensor output voltage below 2.5 V indicates that the HV battery is being

charged, and a voltage above 2.5 V indicates that the HV battery is being discharged. The hybrid vehicle con-

trol ECU determines the amount of either charge or discharge amperage that is being received by the HV bat-

tery based on the signals that are input to terminal IB of the battery smart unit from the battery current sensor.

The hybrid vehicle control ECU also calculates the SOC (state of charge) of the HV battery based on the accu-

mulated amperage.

DTC Logic

INFOID:0000000004212283

DTC DETECTION LOGIC

If the battery smart unit detects malfunction in the battery current sensor, the hybrid vehicle control ECU will

illuminate the MIL and set a DTC.

JMCIA0090GB

JMCIA0112GB

P0AC0-123

HBB-71

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBB

N

O

P

Diagnosis Procedure

INFOID:0000000004212284

1.

CHECK FOR DTC (DTC P0A1F-123 IS OUTPUT)

1. Turn ignition switch ON.

2. Check DTC.
Is DTC P0A1F-123 detected?

YES

>> Go to Diagnosis Procedure relevant to output DTC.

NO

>> GO TO 2.

2.

REPLACE HV RELAY ASSEMBLY

Refer to 

HBB-105, "Removal and Installation"

.

>> GO TO 3.

3.

CLEAR DTC

1. Turn ignition switch ON.

2. Clear DTC.

3. Perform a road test.

NOTE:

Turn ignition switch OFF and perform a road test again after the first road test for 2 trip detection.

>> GO TO 4.

4.

RECONFIRM DTC OUTPUT

1. Turn ignition switch ON.

2. Check DTC.
Is DTC P0AC0-123 detected?

YES

>> Replace battery smart unit. (Refer to 

HBB-101, "Removal and Installation"

).

NO

>> Completed.

DTC No. INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0AC0

123

Hybrid battery pack current sensor 
circuit range/performance

The battery current sensor output 
characteristic is abnormal (offset / 
constant output) (1 trip detection/2 
trip detection)

• HV relay assembly (battery current 

sensor)

• Battery smart unit

HBB-72

< COMPONENT DIAGNOSIS >

P0AFA-123

P0AFA-123

Description

INFOID:0000000004212285

The hybrid vehicle control ECU controls the SOC (state of charge) of the HV battery at a constant level while

driving. The HV battery is composed of 34 modules, and each module consists of six 1.2 V cells in series. The

battery smart unit monitors battery block voltage at 17 locations. Each battery block is composed of 2 modules

in a set.

DTC Logic

INFOID:0000000004212286

DTC DETECTION LOGIC

The battery smart unit monitors a voltage of the battery blocks to detect an open malfunction in internal battery

voltage sensor circuits of the battery smart unit and the wire harness between each battery block and battery

smart unit. If a voltage at one of the battery blocks is below a standard level or of all the battery blocks is within

a specified range, the battery smart unit judges that there is an open in the internal sensor circuit(s) or wire

harness. The hybrid vehicle control ECU then illuminates the MIL and sets a DTC.

Diagnosis Procedure

INFOID:0000000004212287

1.

PRECONDITIONING

• Before inspecting the high-voltage system, 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-volt-

age 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 FOR DTC (DTC P0A1F-123 IS OUTPUT)

1. Turn ignition switch ON.

2. Check DTC.
Is DTC P0A1F-123 detected?

YES

>> Go to Diagnosis Procedure relevant to output DTC.

NO

>> GO TO 3.

JMCIA0086GB

DTC No. INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0AFA

123

Hybrid battery system voltage 
low

Any of the battery block voltages become 
less than 2.0 V (open).
(1 trip detection)

• Battery smart unit
• HV  battery

 

 

 

 

 

 

 

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