Infiniti EX35. Manual — part 416

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-22, "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.

CHG

DIAGNOSIS AND REPAIR WORKFLOW

CHG-5

< BASIC INSPECTION >

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8.

“S” TERMINAL CIRCUIT INSPECTION

Check “S” terminal circuit. Refer to

CHG-14, "Diagnosis Procedure"

.

Is the “S” terminal circuit normal?

YES

>> GO TO 10.

NO

>> Repair as needed.

9.

INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 3,000 RPM)

Increase and maintain the engine speed at 3,000 rpm.

Does the charge warning lamp remain off?

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

INSPECTION OF ALTERNATOR PULLEY

Check alternator pulley. Refer to

CHG-27, "2WD : Inspection"

(2WD) or

CHG-30, "AWD : Inspection"

(AWD).

Is alternator pulley normal?

YES

>> Replace alternator.

NO

>> Repair as needed.

11.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

CHG-10, "Diagnosis Procedure"

.

Is “B” terminal circuit normal?

YES

>> Replace alternator.

NO

>> Repair as needed.

12.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

CHG-10, "Diagnosis Procedure"

.

Is “B” terminal circuit normal?

YES

>> GO TO 13.

NO

>> Repair as needed.

13.

INSPECTION OF ALTERNATOR PULLEY

Check alternator pulley. Refer to

CHG-27, "2WD : Inspection"

(2WD) or

CHG-30, "AWD : Inspection"

(AWD).

Is alternator pulley normal?

YES

>> Replace alternator.

NO

>> Repair as needed.

14.

“S” TERMINAL CIRCUIT INSPECTION

Check “S” terminal circuit. Refer to

CHG-14, "Diagnosis Procedure"

.

Is the “S” terminal circuit normal?

YES

>> Replace alternator.

NO

>> Repair as needed.

CHG-6

< FUNCTION DIAGNOSIS >

CHARGING SYSTEM

FUNCTION DIAGNOSIS

CHARGING SYSTEM

System Diagram

INFOID:0000000003131872

System Description

INFOID:0000000003131873

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.

Component Parts Location

INFOID:0000000003131874

JPMIA0426GB

1.

Alternator

2.

Charge warning lamp

A.

Engine

B.

Combination meter

JSMIA0054ZZ

CHG

CHARGING SYSTEM

CHG-7

< FUNCTION DIAGNOSIS >

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Component Description

INFOID:0000000003131875

Component part

Description

Alternator

The alternator provides DC voltage to operate the vehicle electri-
cal system and to keep the battery charged.

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.