Nissan Altima HL32 Hybrid. Manual - part 720

 

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Nissan Altima HL32 Hybrid. Manual - part 720

 

 

MG ECU

HBC-629

< ECU DIAGNOSIS >

D

E

F

G

H

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J

K

L

M

A

B

HBC

N

O

P

27

3

BR - B

Communication 
request signal

Input/

Output

[Ignition switch: ON]

Refer to CH2 signal.

26

3

LG - B

Communication 
signal from hy-
brid vehicle con-
trol ECU to MG 
ECU

Input

[Ignition switch: ON]

Refer to CH2 signal.
The waveform will vary depending on the content 
of the digital communication (digital signal).

24

3

L/O - B

Communication 
clock signal

Input/

Output

[Ignition switch: ON] 10 - 14V

19

3

R/W - B

Communication 
signal from MG 
ECU to hybrid 
vehicle control 
ECU

Output [Ignition switch: ON]

Refer to CH1 signal.
The waveform will vary depending on the content 
of the digital communication (digital signal).

18

3

Y - B

Communication 
request signal

Input/

Output

[Ignition switch: ON]

Refer to CH1 signal.

Terminal No.

Wire color

Description

Condition

Value

(Approx.)

+

Signal name

Input/

Output

JMCIA0025GB

JMCIA0029GB

JMCIA0026GB

JMCIA0025GB

HBC-630

< ECU DIAGNOSIS >

MG ECU

17

3

V - B

Communication 
signal from hy-
brid vehicle con-
trol ECU to MG 
ECU

Input

[Ignition switch: ON]

Refer to CH1 signal.
The waveform will vary depending on the content 
of the digital communication (digital signal).

15

3

BR/W - B

Communication 
clock signal

Input/

Output

[Ignition switch: ON] 10 - 14V

2

3

L/W  -  B

MG ECU power 
source

Input/

Output

[Ignition switch: ON] 10 - 14V

1

3

L/W  -  B

MG ECU power 
source

Input/

Output

[Ignition switch: ON] 10 - 14V

13

3

R - B

Interlock switch 
signal

Input

[Ignition switch: ON]
• Compressor fuse 

cover and service 
plug grip: Installed 
correctly

Below 1V

[Ignition switch: ON]
• Compressor fuse 

cover and service 
plug grip: Detached

10 - 14V

12

3

GR/R - B

Interlock switch 
signal

Output

[Ignition switch: ON]
• Compressor fuse 

cover and service 
plug grip: Installed 
correctly

Below 1V

[Ignition switch: ON]
• Compressor fuse 

cover and service 
plug grip: Detached

10 - 14V

Terminal No.

Wire color

Description

Condition

Value

(Approx.)

+

Signal name

Input/

Output

JMCIA0029GB

PRECAUTIONS

HBC-631

< PRECAUTION >

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G

H

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J

K

L

M

A

B

HBC

N

O

P

PRECAUTION

PRECAUTIONS

General Precautions

INFOID:0000000004212203

• Always use a 12 volt battery as power source.

• Do not attempt to disconnect battery cables while engine is

running.

• Do not disassemble ECUs.

• If the battery is disconnected, the following emission-related

diagnostic information will be lost within 3 minutes.

Diagnostic trouble codes

Freeze frame data

• When connecting the hybrid vehicle control ECU harness

connector, fasten it securely with a lever as far as it will go as

shown in the figure.

• When connecting or disconnecting pin connectors into or

from the hybrid vehicle control ECU, take care not to damage

pin terminals (bend or break).

Make sure that there are not any bends or breaks on the

hybrid vehicle control ECU pin terminal, when connecting pin

connectors.

• Securely connect the hybrid vehicle control ECU harness

connectors.

A poor connection can cause an extremely high (surge) volt-

age to develop in coil and condenser, thus resulting in dam-

age to ICs.

• Keep hybrid vehicle control system harness at least 10 cm (4

in) away from adjacent harness, to prevent hybrid vehicle control system malfunctions due to

receiving external noise, degraded operation of ICs, etc.

• Keep hybrid vehicle control system parts and harness dry.

SEF289H

ALCIA0011ZZ

PBIB0090E

HBC-632

< PRECAUTION >

PRECAUTIONS

• When measuring ECU signals with a circuit tester, never allow

the two tester probes to contact.

Accidental contact of probes will cause a short circuit and

damage the ECU power transistor.

• When installing C.B. ham radio or a mobile phone, be sure to

observe the following as it may adversely affect electronic

control systems depending on installation location.

Keep the antenna as far as possible from the electronic con-

trol units.

Keep the antenna feeder line more than 20 cm (8 in) away

from the harness of electronic controls.

Do not let them run parallel for a long distance.

Adjust the antenna and feeder line so that the standing-wave

radio can be kept smaller.

Be sure to ground the radio to vehicle body.

Precautions For High-Voltage System

INFOID:0000000004212204

Refer to 

GI-24, "Precautions For High-Voltage System"

.

Precautions for Inspecting the Hybrid Control System

INFOID:0000000004212205

• 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. Make sure to turn ignition switch OFF before removing the service

JMCIA0152GB

SEF708Y

 

 

 

 

 

 

 

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