Infiniti G35 (V35) Sedan. Manual - part 302

CHG

CHARGING SYSTEM

CHG-7

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Component Description

INFOID:0000000000964267

Component part

Description

Alternator

“B” terminal

Refer to 

CHG-10, "Description"

.

“S” terminal

Refer to 

CHG-14, "Description"

.

“L” terminal

Refer to 

CHG-11, "Description"

.

“C” terminal

Used for the power generation voltage variable control system. 
Refer to 

CHG-8, "System Description"

.

Combination meter (Charge warning lamp)

The IC 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.

IPDM E/R

Used for the power generation voltage variable control system. 
Refer to 

CHG-8, "System Description"

.

CHG-8

< FUNCTION DIAGNOSIS >

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

System Diagram

INFOID:0000000000964268

System Description

INFOID:0000000000964269

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 regulator of the alternator.

Component Parts Location

INFOID:0000000000964270

Component Description

INFOID:0000000000964271

SKIB5009E

1.

Battery

2.

IPDM E/R

3.

Battery current sensor

4.

ECM

5.

Alternator

A.

Engine room dash panel (RH)

B.

Behind glove box

C.

Engine

JSMIA0011ZZ

CHG

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

CHG-9

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Component part

Description

Battery current sensor

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

ECM

Battery current sensor detects the charging/discharging current of 
the battery. ECM judges 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 target 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 val-
ue into the power generation command signal (PWM signal) and 
sends it to the IC regulator.

Alternator (IC regulator)

IC regulator controls the power generation voltage by the target 
power generation voltage based on the received power generation 
command signal.
When there is no power generation command signal, the alterna-
tor performs the normal power generation according to the char-
acteristic of the IC regulator.

CHG-10

< COMPONENT DIAGNOSIS >

B TERMINAL CIRCUIT

COMPONENT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000000964272

“B” terminal circuit supplies power to charge the battery and operate the vehicle’s electrical system.

Diagnosis Procedure

INFOID:0000000000964273

1.

CHECK “B” TERMINAL CONNECTION

1.

Turn ignition switch OFF.

2.

Check if “B” terminal is clean and tight.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair “B” terminal connection. Confirm repair by performing complete Starting/Charging system

test. Refer to Technical Service Bulletin.

2.

CHECK “B” TERMINAL CIRCUIT

Check voltage between alternator “B” terminal and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness for open between alternator and fusible link.

3.

CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)

1.

Start engine, then engine running at idle and warm.

2.

Check voltage between battery positive terminal and alternator “B” terminal.

Is the inspection result normal?

YES

>> “B” terminal circuit is normal. Refer to 

CHG-3, "Work Flow"

.

NO

>> Check harness between battery and alternator for poor continuity.

Terminals

Voltage (Approx.)

(+)

(–)

Alternator “B” terminal

Terminal

E203

1

Ground

Battery voltage

Terminals

Voltage (Approx.)

(+)

(–)

Alternator “B” terminal

Terminal

Battery positive terminal

E203

1 

Less than 0.2 V