Nissan Altima HL32 Hybrid. Manual - part 477

GI-48

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

Note in the illustration that there is an excessive 4.1 volt drop between the battery and the bulb.

Measuring Voltage Drop — Steb-by-Step

• The step-by-step method is most useful for isolating excessive drops in low voltage systems (such as those

in “Computer Controlled Systems”).

• Circuits in the “Computer Controlled System” operate on very low amperage.

• The (Computer Controlled) system operations can be adversely affected by any variation in resistance in the

system. Such resistance variation may be caused by poor connection, improper installation, improper wire

gauge or corrosion.

• The step by step voltage drop test can identify a component or wire with too much resistance.

CONTROL UNIT CIRCUIT TEST 

System Description

• When the switch is ON, the control unit lights up the lamp.

CASE 1

SGI974

SAIA0258E

MGI034A

SERVICE INFORMATION FOR ELECTRICAL INCIDENT

GI-49

< BASIC INSPECTION >

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INPUT-OUTPUT VOLTAGE CHART

• The voltage value is based on the body ground.
• *: If high resistance exists in the switch side circuit (caused by a single strand), terminal 1 does not detect battery voltage. Control unit

does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not supply power to light up the
lamp.

CASE 2

INPUT-OUTPUT VOLTAGE CHART

• The voltage value is based on the body ground.
• *: If high resistance exists in the switch side circuit (caused by a single strand), terminal 2 does not detect approx. 0V. Control unit

does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not control ground to light up the
lamp.

Terminal No.

Description

Condition

Value (Approx.)

In case of high resistance such as single 
strand (V) *

+

−

Signal name

Input/

Output

1

Body 
ground

Switch

Input

Switch ON

Battery voltage

Lower than battery voltage Approx. 8 (Ex-
ample)

Switch OFF

0 V

Approx. 0

2

Body 
ground

Lamp

Output

Switch ON

Battery voltage

Approx. 0 (Inoperative lamp)

Switch OFF

0 V

Approx. 0

Terminal No.

Description

Condition

Value (Approx.)

In case of high resistance such as single 
strand (V) *

+

−

Signal name

Input/

Output

1

Body 
ground

Lamp

Output

Switch ON

0V

Battery voltage (Inoperative lamp)

Switch OFF

Battery voltage

Battery voltage

2

Body 
ground

Switch

Input

Switch ON

0 V

Higher than 0 Approx. 4 (Example)

Switch OFF

5 V

Approx. 5

MGI035A

GI-50

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CONSULT-III CHECKING SYSTEM

CONSULT-III CHECKING SYSTEM

Description

INFOID:0000000004211216

• When CONSULT-III is connected with a data link connector

equipped on the vehicle side, it will communicate with the control

unit equipped in the vehicle and then enable various kinds of diag-

nostic tests.

• Refer to “CONSULT-III Operation Manual” for more information.

Function and System Application

INFOID:0000000004211217

x: Applicable

CONSULT-III Data Link Connector (DLC) Circuit

INFOID:0000000004211218

INSPECTION PROCEDURE

If the CONSULT-III cannot diagnose the system properly, check the following items.

1

: Hood release handle

2

: Data link connector

ALBIA0047ZZ

Diagnostic test mode

Function

ABS

IPDM E/R

HYBRID SY

STEM

MUL

T

I A

V

HV

AC

BC

M

R

E

AR

VI

EW CAMERA

AIR B

A

G

MET

E

R/M

&

A

ENGINE

ECU identification

ECU part number can be read.

x

x

x

x

x

x

x

x

-

x

Self-diagnostic results

Current and past self-diagnostic results can be read and erased 
quickly.

x

x

x

x

x

x

-

x

x

x

Data  monitor

Input/Output  data  in  the  ECU  can  be  read.

x

x

x

x

x

x

x

x

x

x

Active test

Diagnostic Test Mode in which CONSULT-III drives some actua-
tors apart from the ECUs and also shifts some parameters in a 
specified range.

x

x

x

-

x

x

-

-

-

x

Work support

This mode enables a technician to adjust some devices faster and 
more accurately by following the indications on CONSULT-III.

x

-

-

-

x

x

x

-

-

x

CAN diagnosis

The condition of CAN communication line can be indicated by a 
topology.

x

x

x

x

x

x

x

x

x

x

CAN diagnosis support 
monitor

The  condition  of  CAN  communication  line  can  be  read.

x

x

x

x

x

x

x

x

x

x

DTC work support

The operating condition to confirm Diagnosis Trouble Codes can 
be selected.

-

-

-

-

-

-

-

-

-

x

DTC & SRT confirmation

The results of SRT (System Readiness Test) and the self-diagno-
sis status/result can be confirmed.

-

-

-

-

-

-

-

-

-

x

Configuration

Function  to  READ/WRITE  vehicle  configuration  on  BCM.

-

-

-

-

-

x

-

-

-

-

CONSULT-III CHECKING SYSTEM

GI-51

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NOTE:

The CAN1 system (DDL1) from DLC pins 6 and 14, the HEV CAN2 system (DDL2) from DLC pins 12 and 13

as well as the DDL circuit from DLC pin 7 may be connected to more than one system. A short in any circuit

connected to a control unit in one system may affect CONSULT-III access to other systems.

Symptom

Check item

CONSULT-III cannot access 
any system.

• CONSULT-III DLC power supply circuit (Terminal 8) and ground circuit (Terminal 4) 

CONSULT-III cannot access in-
dividual system. (Other sys-
tems can be accessed.)

• Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring 

diagram for each system.)

• Open or short circuit between the system and CONSULT-III DLC (For detailed circuit, refer to wiring 

diagram for each system.)

• Open or short circuit CAN communication line. Refer to 

LAN-53, "Trouble Diagnosis Flow Chart"

.