Infiniti FX35, FX50 (S51). Manual - part 430

 

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Infiniti FX35, FX50 (S51). Manual - part 430

 

 

CHG

CHG-1

ELECTRICAL & POWER CONTROL

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SECTION 

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CONTENTS

CHARGING SYSTEM

BASIC INSPECTION  ....................................

3

DIAGNOSIS AND REPAIR WORKFLOW  ..........

3

Work Flow  .................................................................

3

SYSTEM DESCRIPTION  ..............................

6

CHARGING SYSTEM ..........................................

6

System Diagram ........................................................

6

System Description  ...................................................

6

VQ35HR .......................................................................

6

VQ35HR : Component Parts Location  ......................

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VK50VE .......................................................................

7

VK50VE : Component Parts Location  .......................

7

Component Description ............................................

7

POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM .................................

8

System Diagram ........................................................

8

System Description  ...................................................

8

VQ35HR .......................................................................

8

VQ35HR : Component Parts Location  ......................

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VK50VE .......................................................................

8

VK50VE : Component Parts Location  .......................

9

Component Description .............................................

9

DTC/CIRCUIT DIAGNOSIS  .........................

10

B TERMINAL CIRCUIT  ......................................

10

Description ..............................................................

10

Diagnosis Procedure ...............................................

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L TERMINAL CIRCUIT (OPEN)  .........................

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Description ..............................................................

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Diagnosis Procedure ...............................................

11

L TERMINAL CIRCUIT (SHORT) .......................

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Description ..............................................................

13

Diagnosis Procedure ...............................................

13

S TERMINAL CIRCUIT  .....................................

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Description ...............................................................

14

Diagnosis Procedure  ...............................................

14

CHARGING SYSTEM  .......................................

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Wiring Diagram - CHARGING SYSTEM -  ...............

15

SYMPTOM DIAGNOSIS  ..............................

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CHARGING SYSTEM  .......................................

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Symptom Table  .......................................................

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PRECAUTION ..............................................

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PRECAUTIONS .................................................

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Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................

24

Precaution for Power Generation Voltage Variable 
Control System  ........................................................

24

PREPARATION ...........................................

25

PREPARATION .................................................

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Special Service Tools  ..............................................

25

Commercial Service Tools .......................................

25

PERIODIC MAINTENANCE  ........................

26

CHARGING SYSTEM PRELIMINARY IN-
SPECTION ........................................................

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Inspection Procedure ...............................................

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POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM OPERATION IN-
SPECTION ........................................................

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Inspection Procedure ...............................................

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REMOVAL AND INSTALLATION  ...............

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ALTERNATOR ..................................................

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VQ35HR .....................................................................

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CHG

DIAGNOSIS AND REPAIR WORKFLOW

CHG-3

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005242953

OVERALL SEQUENCE

DETAILED FLOW

JSMIA0009GB

CHG-4

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

NOTE:
To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be done
as a set from start to finish.

1.

PRELIMINARY INSPECTION

Perform the preliminary inspection. Refer to 

CHG-26, "Inspection Procedure"

.

>> GO TO 2.

2.

STOP POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

Stop the operation of the power generation voltage variable control in either of the following procedures.
• After selecting “ENGINE” of “SELECT SYSTEM” using CONSULT-III, set the DUTY value of “ALTERNATOR

DUTY” to 0 % by selecting “ALTERNATOR DUTY” of “Active Test”. Continue “Active Test” until the end of
inspection. (When the DUTY value is 0 or 100 %, the normal power generation is performed according to the
characteristic of the IC voltage regulator of the alternator.)

• Turn the ignition switch OFF, and disconnect the battery current sensor connector. [However, DTC (P1550 -

P1554) of the engine might remain. After finishing the inspection, connect the battery current sensor connec-
tor and erase the self-diagnosis results history of the engine using CONSULT-III.]

>> GO TO 3.

3.

DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER

Perform the charging system test using Starting/Charging System Tester (SST: J-44373). For details and oper-
ating instructions, refer to Technical Service Bulletin.

Test result

CHARGING SYSTEM NORMAL>>Charging system is normal and will also show “DIODE RIPPLE” test

result.

NO CHARGING VOLTAGE>>GO TO 4.
LOW CHARGING VOLTAGE>>GO TO 12.
HIGH CHARGING VOLTAGE>>GO TO 14.
DIODE RIPPLE NORMAL>>Diode ripple is OK and will also show “CHARGING VOLTAGE” test result.
EXCESS RIPPLE DETECTED>>Replace the alternator. Perform “DIODE RIPPLE” test again using Starting/

Charging System Tester (SST: J-44373) to confirm repair.

DIODE RIPPLE NOT DETECTED>>GO TO 4.

4.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)

Turn the ignition switch ON.

Does the charge warning lamp illuminate?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

“L” TERMINAL CIRCUIT (OPEN) INSPECTION

Check “L” terminal circuit (open). Refer to 

CHG-11, "Diagnosis Procedure"

.

Is the “L” terminal circuit normal?

YES

>> Replace alternator.

NO

>> Repair as needed.

6.

INSPECTION WITH CHARGE WARNING LAMP (IDLING)

Start the engine and run it at idle.

Does the charge warning lamp turn OFF?

YES

>> GO TO 9.

NO

>> GO TO 7.

7.

“L” TERMINAL CIRCUIT (SHORT) INSPECTION

Check “L” terminal circuit (short). Refer to 

CHG-13, "Diagnosis Procedure"

.

Is the “L” terminal circuit normal?

YES

>> GO TO 8.

NO

>> Repair as needed.

 

 

 

 

 

 

 

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