Nissan Silvia. Manual — part 333

System Description

NMSC0009

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 regulator.
Power is supplied at all times to alternator terminal 4 (S) through:

I

100A fusible link (letter A, located in the fuse and fusible link box), and

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10A fuse (No. 40, located in the fuse and fusible link box).

Terminal B supplies power to charge the battery and operate the vehicle’s electrical system. Output voltage
is controlled by the IC regulator at terminal 4 (S) detecting the input voltage. The charging circuit is protected
by the 100A fusible link.
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied

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through 10A fuse [No. 11, located in the fuse block (J/B)]

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to combination meter terminal 12 for the charge warning lamp.

Ground is supplied to terminal 61 of the combination meter through terminal 3 (L) of the alternator. With power
and ground supplied, the charge warning lamp will illuminate. When the alternator is providing sufficient volt-
age with the engine running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a fault is indicated.

GI

MA

EM

LC

EC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

EL

IDX

CHARGING SYSTEM

System Description

SC-19

Wiring Diagram — CHARGE —

NMSC0010

TSC008

CHARGING SYSTEM

Wiring Diagram — CHARGE —

SC-20

Trouble Diagnoses

NMSC0011

Before conducting an alternator test, make sure that the battery is fully charged. A 30-volt voltmeter and suit-
able test probes are necessary for the test. The alternator can be checked easily by referring to the Inspec-
tion Table.

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Before starting, inspect the fusible link.

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Use fully charged battery.

WITH IC REGULATOR

NMSC0011S01

SEL338V

NOTE:

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If the inspection result is OK even though the charging system is malfunctioning, check the B terminal
connection. (Check the tightening torque.)

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When field circuit is open, check condition of rotor coil, rotor slip ring and brush. If necessary, replace faulty
parts with new ones.

MALFUNCTION INDICATOR

NMSC0011S02

The IC regulator warning function activates to illuminate “CHARGE” warning lamp, if any of the following
symptoms occur while alternator is operating:

I

Excessive voltage is produced.

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No voltage is produced.

GI

MA

EM

LC

EC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

EL

IDX

CHARGING SYSTEM

Trouble Diagnoses

SC-21

Construction

NMSC0012

MEL466N

MEL467N

Removal and Installation

NMSC0013

REMOVAL

NMSC0013S01

1.

Remove alternator harness.

2.

Loosen alternator upper nut and lower nut.

3.

Loosen drive belt.

4.

Remove alternator upper nut and lower bolt.

5.

Remove alternator.

MEL468N

INSTALLATION

NMSC0013S02

To install, reverse the removal procedure.

CHARGING SYSTEM

Construction

SC-22