Nissan Altima HL32 Hybrid. Manual - part 556

U029A-123

HBB-81

< COMPONENT DIAGNOSIS >

D

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A

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HBB

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4. Turn ignition switch ON.

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

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness or connector.

4.

CHECK WAVEFORM

CAUTION:

Be sure to wear insulated gloves.

1. Turn ignition switch OFF.

2. Connect the hybrid vehicle control ECU harness connector B66.

3. Connect the battery smart unit harness connector B130.

4. Connect an oscilloscope between the battery smart unit termi-

nals specified in the table below, and measure the waveform.

Hybrid vehicle control ECU

Battery smart unit

Resistance

Connector

Terminal

Connector

Terminal

B66

133 (BTH+)

B130

13 (BTH+)

Below 1

Ω

B66

150 (BTH

−)

B130

12 (BTH

−)

Hybrid vehicle control ECU

Ground

Resistance

Connector

Terminal

B66

133 (BTH+)

Ground

10 k

Ω or higher

B66

150 (BTH

−)

Battery smart unit

Ground

Resistance

Connector

Terminal

B130

133 (BTH+)

Ground

10 k

Ω or higher

B130

150 (BTH

−)

Hybrid vehicle control ECU

Ground

Voltage

Connector

Terminal

B66

133 (BTH+)

Ground

Below 1V

B66

150 (BTH

−)

JMCIA0255ZZ

HBB-82

< COMPONENT DIAGNOSIS >

U029A-123

OK or NG

OK

>> Replace hybrid vehicle control ECU. (Refer to 

HBC-644,

"Removal and Installation"

).

NG

>> Replace battery smart unit. (Refer to 

HBB-101,

"Removal and Installation"

).

5.

CHECK FUSE

1. Turn ignition switch OFF.

2. Remove 10A fuse (No. 69) from the high voltage fuse and fusible link box.

3. Measure the resistance of the fuse.

OK or NG

OK

>> GO TO 6.

NG

>> Replace fuse.

6.

CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HIGH VOLTAGE FUSE AND FUSIBLE

LINK BOX)

CAUTION:

Be sure to wear insulated gloves.

1. Install the 10A fuse to the high voltage fuse and fusible link box.

2. Remove the IGCT relay from the high voltage fuse and fusible link box.

3. Disconnect the battery smart unit harness connector B130.

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

OK or NG

OK

>> Check and repair power source circuit.

NG

>> Repair or replace harness or connector.

Item

Contents

Battery smart unit terminal 
(A)

CH1: 13 (BTH+) - 10 (GND)
CH2: 12 (BTH–) - 10 (GND)

Equipment Setting

2 V/DIV., 500 

µs/DIV.

Condition

Ignition switch ON

JMCIA0091GB

Standard resistance: Below 1

Ω

Battery smart unit

High voltage fuse and fusible link box

Resistance

Connector

Terminal

Connector

Terminal

B130

1 (IGCT [LH6])

—

IGCT relay

Below 1 

Ω

BATTERY SMART UNIT

HBB-83

< ECU DIAGNOSIS >

D

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HBB

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ECU DIAGNOSIS

BATTERY SMART UNIT

Reference Value

INFOID:0000000004212300

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:

• Do not measure voltage or waveform directly at the sealed side of the inverter with converter assembly con-

nectors. Doing so may damage the connectors because these connectors are waterproof.

• Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering wave-

forms have been omitted.

JMCIA0169ZZ

Terminal No.

Wire 

color

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

1

10

R/W

Control signal

Input

[Ignition switch: 
READY]

9 - 14 V

9

10

B/Y

Cooling fan monitor 
signal

Input

[Ignition switch: ON]
• Cooling fan: Activat-

ed

0 - 5 V

10

Grou

nd

B

Battery smart unit 
battery 

—

[Ignition switch: ON]

0 V

HBB-84

< ECU DIAGNOSIS >

BATTERY SMART UNIT

12

10

B/R

Serial communica-
tion

Input/

Output

[Ignition switch: ON]

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

13

10

BR/W

Serial communica-
tion

Input/

Output

[Ignition switch: ON]

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

Terminal No.

Wire 

color

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

JMCIA0031GB

JMCIA0030GB