Infiniti QX56 (Z62). Manual - part 229

 

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Infiniti QX56 (Z62). Manual - part 229

 

 

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PREPARATION

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< PREPARATION >

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PREPARATION

PREPARATION

Special Service Tools

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Commercial Service Tools

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Tool number

(Kent-Moore No.)

Tool name

Description

(J-44373 Model MCR620)
Starting/Charging System Tester

Tests starting and charging systems.
For operating instructions, refer to Technical 
Service Bulletin.

SEL403X

Tool name

Description

Power tool

Loosening bolts, nuts and screws

PIIB1407E

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< SYSTEM DESCRIPTION >

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

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Component Description

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1.

IPDM E/R
Refer to 

PCS-4, "Component Parts 

Location"

.

2.

ECM
Refer to 

EC-16, "Component Parts 

Location"

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3.

Battery current sensor
Refer to 

EC-16, "Component Parts 

Location"

.

4.

Alternator

5.

Combination meter (charge warning 
lamp)
Refer to 

MWI-6, "METER SYSTEM : 

Component Parts Location"

.

A.

Engine room (RH)

JMMIA0411ZZ

Component part

Description

Alternator (IC voltage regulator)

IC voltage regulator controls the power generation voltage by the target power genera-
tion voltage based on the received power generation command signal.
When there is no power generation command signal, the alternator performs the normal 
power generation according to the characteristic of the IC voltage regulator.

Battery current sensor

Battery current sensor is installed to the battery cable at the negative terminal, and it de-
tects the charging/discharging current of the battery and sends the voltage signal to ECM 
according to the current value.

Combination meter (Charge warning lamp)

The IC voltage regulator warning function activates to illuminate the charge warning 
lamp, if any of the following symptoms occur while alternator is operating:
• Excessive voltage is produced.
• No voltage is produced.

ECM

Battery current sensor detects the charging/discharging current of the battery. ECM judg-
es the battery condition based on this signal.
ECM judges whether to perform the power generation voltage variable control according 
to the battery condition.
When performing the power generation voltage variable control, ECM calculates the tar-
get power generation voltage according to the battery condition and sends the calculated 
value as the power generation command value to IPDM E/R.

IPDM E/R

IPDM E/R converts the received power generation command value into the power gen-
eration command signal (PWM signal) and sends it to the IC voltage regulator.

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SYSTEM

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< SYSTEM DESCRIPTION >

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SYSTEM

CHARGING SYSTEM

CHARGING SYSTEM : System Diagram

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CHARGING SYSTEM : System Description

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The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC voltage regulator.

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System Dia-
gram

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POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System De-

JPMIA0633GB

JPMIA0632GB

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< SYSTEM DESCRIPTION >

SYSTEM

scription

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By performing the power generation voltage variable control, the engine load due to the power generation of
the alternator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generation voltage variable control system, the power genera-
tion is performed according to the characteristic of the IC voltage regulator of the alternator.

 

 

 

 

 

 

 

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