Nissan Altima HL32 Hybrid. Manual - part 621

P0A78-121

HBC-233

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

OK

>> GO TO 12.

NG

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

.)

12.

CHECK INVERTER WITH CONVERTER ASSEMBLY (HIGH VOLTAGE CONNECTOR CONNECTION

CONDITION)

CAUTION:

Be sure to wear insulated gloves.

1. Check that the service plug grip is not installed.

NOTE:

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

vice manual because this may cause a malfunction.

2. Check the connection of the high voltage connector of the

inverter with converter assembly.

OK or NG

OK

>> GO TO 13.

NG

>> Connect securely.

13.

CHECK SERVICE PLUG GRIP

CAUTION:

Be sure to wear insulated gloves.

1. Check the connection of the service plug grip.

OK or NG

OK

>> GO TO 14.

NG

>> Replace service plug grip.

14.

CHECK SERVICE PLUG GRIP

The connector is connected securely and there are no 
contact problems.

AWCIA0027ZZ

Dirt or foreign objects have not entered the connection, 
or there is no evidence of contamination.

ALCIA0015ZZ

HBC-234

< COMPONENT DIAGNOSIS >

P0A78-121

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

below.

OK or NG

OK

>> GO TO 15.

NG

>> Replace service plug grip.

15.

CHECK CONDITION OF FRAME WIRE CONNECTIONS (HV RELAY ASSEMBLY SIDE)

See 

HBC-527, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 16.

NG

>> Tighten to specified torque.

16.

CHECK FRAME WIRE

CAUTION:

Be sure to wear insulated gloves and protective goggles.

1. Check that the service plug grip is not installed.

2. Disconnect the frame wire from the HV relay.

3. Disconnect the frame wire from the high voltage connector of

the inverter with converter assembly.

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

below.

Service plug grip

Resistance

Component

connector

Terminal

—

See figure

Below 1 

Ω

JMCIA0193GB

AWCIA0027ZZ

Frame wire (HV relay side)

Frame wire (Inverter with con-

verter assembly side)

Resistance

Harness

connector

Terminal

Harness

connector

Terminal

E308

1 (high volt-

age+)

E313

1 (high volt-

age+)

Below 1 

Ω

E309

1 (high volt-

age-)

2  (high volt-

age-)

Below 1 

Ω

JMCIA0146GB

P0A78-121

HBC-235

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

5. Using a megohmmeter (500 V range), measure the insulation

resistance according to the value(s) in the table below.

NOTE:

Be sure to set the megohmmeter to 500 V when performing this

test. Using a setting higher than 500 V can result in damage to

the component being inspected.

OK or NG

OK

>> GO TO 17.

NG

>> Replace frame wire.

17.

INSPECT HV RELAY ASSEMBLY (SMRB)

CAUTION:

Be sure to wear insulated gloves.

1. Check that the service plug grip is not installed.

2. Remove the HV relay assembly from the vehicle (See 

HBB-105,

"Removal and Installation"

).

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

below.

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

OK or NG

OK

>> GO TO 18.

NG

>> Replace HV relay assembly (See 

HBB-105, "Removal and Installation"

).

18.

INSPECT HV RELAY ASSEMBLY (SMRG)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

1. Check that the service plug grip is not installed.

Frame wire (HV relay side)

Ground

Resistance

Harness

connector

Terminal

E308

1 (high volt-

age+)

Body ground and shielded 
wire ground

10 M

Ω or higher

E309

1 (high volt-

age-)

Body ground and shielded 
wire ground

10 M

Ω or higher

Frame wire (HV relay side)

Frame wire (HV relay side)

Resistance

Harness 

connector

Terminal

Harness 

connector

Terminal

E308

1 (high voltage+)

E309

1 (high voltage-) 10 M

Ω or higher

JMCIA0194GB

HV relay assembly

HV relay assembly

Resistance

Component

connector

Terminal

Component

connector

Terminal

E308

1 (high 

volt-

age+)

s1

1

Below 1 

Ω

[When battery voltage (12 V) is 

applied to n3 terminals 2 

(GND) and 3 (CON2)]

Frame wire (HV relay side)

Frame wire (HV relay side)

Resistance

Harness 

connector

Terminal

Harness 

connector

Terminal

n3

3 (CON2)

n3

2 (GND)

18.8 to 32.1 

Ω at -35 to 80°C (-31 

to 176

°F)

JMCIA0196GB

HBC-236

< COMPONENT DIAGNOSIS >

P0A78-121

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

below.

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

below.

OK or NG

OK

>> Replace inverter with converter assembly (See 

HBC-638, "Removal and Installation"

).

NG

>> Replace HV relay assembly (See 

HBB-105, "Removal and Installation"

).

19.

CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

See 

HBC-171, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 20.

NG

>> Connect securely.

20.

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.

21.

CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

See 

HBC-164, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 22.

NG

>> Connect securely.

22.

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.

HV relay assembly

HV relay assembly

Resistance

Component

connector

Terminal

Component

connector

Terminal

E309

1 (high 

voltage-)

t1

1

Below 1 

Ω

[When battery voltage (12 V) is 

applied to n3 terminals 1 

(CON3) and 2 (GND)]

HV relay assembly

HV relay assembly

Resistance

Component

connector

Terminal

Component

connector

Terminal

n3

1 

(CON3)

n3

2 (GND)

18.8 to 32.1 

Ω at -35 to 80°C

(-31 to 176

°F)

JMCIA0197GB