Nissan Altima HL32 Hybrid. Manual - part 514

U0424 ELECTRIC COMPRESSOR

HAC-77

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

8.

INSPECT MG ECU

CAUTION:

• Be sure to wear insulated gloves.

• Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is

removed.

1. Disconnect the MG ECU connector.

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

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace MG ECU.

9.

MG ECU CIRCUIT

1. Disconnect the electric compressor connector.

CAUTION:

Be sure to wear insulated gloves.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair harness or connector.

10.

INSPECT ELECTRIC COMPRESSOR

1. Reconnect the electric compressor connector.

2. Turn ignition switch ON.

3. Measure the waveform according to the following tables.

MG ECU

Condition

Resistance (

Ω)

 Connector

 Terminal

 Connector

 Terminal

F250

11

F225

1

Always

Below 1.0

12

2

Electric compressor

MG ECU

Condition

Resistance (

Ω)

 Connector

 Terminal

 Connector

 Terminal

F252

7

F250

12

Always

Below 1.0

8

11

HAC-78

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

U0424 ELECTRIC COMPRESSOR

Is the inspection result normal?

YES

>> Replace HV ECU. Refer to 

HBC-644, "Removal and Installation"

.

NO

>> Replace electric compressor. Refer to 

HA-31, "Removal and Installation"

.

HV ECU

–

Condition

Value

(Approx.)

 Connector

 Terminal

E65

54

Ground

• IGN SW: ON (READY)
• A/C system: Not operating

• IGN SW: ON (READY)
• A/C system: Operating

55

IGN SW: ON (READY)

JMCIA0001GB

JMCIA0002GB

JMCIA0005GB

U1000 CAN COMM CIRCUIT

HAC-79

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

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U1000 CAN COMM CIRCUIT

Description

INFOID:0000000004215365

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000004215366

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (READY) and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>>

HAC-79, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

INFOID:0000000004215367

Go to 

LAN-16, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

U1000

CAN communication 
line

When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission related diagno-
sis) for 2 seconds or more.

• Harness or connectors

(CAN communication line is open or 
shorted)

U1001

When ECM is not transmitting or receiving CAN com-
munication signal other than OBD (emission related 
diagnosis) for 2 seconds or more.

HAC-80

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000004215368

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000004215369

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (READY).

2. Check DTC.
Is DTC detected?

YES

>> Go to 

HAC-80, "Diagnosis Procedure"

.

NO

>> END.

Diagnosis Procedure

INFOID:0000000004215370

1.

INSPECTION START

1. Turn ignition switch ON (READY).

2. Select “SELF-DIAG RESULTS” mode with CONSULT-III.

3. Touch “ERASE”.

4. Perform DTC CONFIRMATION PROCEDURE.

See 

HAC-80, "DTC Logic"

.

5. Check DTC.
Is the DTC U1010 displayed again?

YES

>> Replace auto amp. Refer to 

VTL-8, "Removal and Installation"

.

NO

>> END.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1010

CAN controller

When detecting error during the initial diagno-
sis of CAN controller of ECM.

• Auto amp.