Infiniti Q45 (FY33). Manual — part 266

SEL070Y

DIAGNOSTIC PROCEDURE 1

(“L” terminal circuit check)

CHECK “L” TERMINAL CONNECTION.
Check to see if “L” terminal is clean and
tight.

OK

E

NG

Repair “L” terminal connec-
tion. Confirm repair by per-
forming complete Battery/
Starting/Charging system
test.

CHECK “L” TERMINAL CIRCUIT.
1. Disconnect

E108

connector.

2. Apply ground to harness connector

E108

terminal

q

3

(W/R) with the ignition

switch in the ON position.

CHARGE lamp should light up.

OK

E

NG

Check the following.

I

7.5A fuse [No.

4

, located

in fuse block (J/B)]

I

CHARGE lamp

I

Harness for open or short
between combination
meter and fuse

I

Harness for open or short
between combination
meter and alternator

Replace the alternator.
Confirm repair by performing complete
Battery/Starting/Charging system test.

SEL071Y

DIAGNOSTIC PROCEDURE 2

(“B” terminal circuit check)

SEL072Y

CHECK “B” TERMINAL CONNECTION.
Check to see if “B” terminal is clean and
connected tightly.

OK

E

NG

Repair “B” terminal connec-
tion.

CHECK ALTERNATOR “B” TERMINAL
CIRCUIT.
Check voltage between alternator harness
connector

E107

terminal

q

1

(B/R) and

ground using a digital circuit tester.
Battery voltage should exist.

OK

E

NG

Check the following.

I

120A fusible link (letter a ,
located in fuse and fus-
ible link box)

I

Harness for open or short
between alternator and
fusible link

CHECK “B” TERMINAL CONNECTION
QUALITY (VOLTAGE DROP TEST).
Check voltage between alternator harness
connector

E107

terminal

q

1

(B/R) and bat-

tery positive terminal using a digital tester.
When the engine running at idle and warm:
Voltage: Less than 0.2V

OK

E

NG

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

Replace the alternator.
Confirm repair by performing complete
Battery/Starting/Charging system test.

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

IDX

CHARGING SYSTEM

Trouble Diagnoses with
Battery/Starting/Charging System Tester
(Cont’d)

H

H

H

H

H

EL-55

SEL073Y

DIAGNOSTIC PROCEDURE 3

(“S” terminal circuit check)

SEL074Y

CHECK “S” TERMINAL CONNECTION.
Check to see if “S” terminal is clean and
tight.

OK

E

NG

Repair “S” terminal connec-
tion.
Confirm repair by perform-
ing complete Battery/
Starting/Charging system
test.

CHECK ALTERNATOR “S” TERMINAL
CIRCUIT.
Check voltage between alternator harness
connector

E108

terminal

q

4

(Y/R) and

ground using a digital circuit tester.
Battery voltage should exist.

OK

E

NG

Check the following.

I

7.5A fuse (No.

62

,

located in fuse and fus-
ible link box)

I

Harness for open or short
between alternator and
fuse

CHECK “S” TERMINAL CONNECTION
QUALITY (VOLTAGE DROP TEST).
Check voltage between alternator harness
connector

E108

terminal

q

4

(Y/R) and bat-

tery positive terminal using a digital tester.
When the engine running at idle and warm:
Voltage: Less than 0.2V

OK

E

NG

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

Replace the alternator.
Confirm repair by performing complete
Battery/Starting/Charging system test.

MALFUNCTION INDICATOR

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.

I

No voltage is produced.

MEL585G

Removal and Installation

REMOVAL

1.

Remove engine upper cover.

2.

Remove drive belt from alternator.

3.

Disconnect harness connector.

4.

Remove alternator.

INSTALLATION

To install, reverse the removal procedure.

CHARGING SYSTEM

Trouble Diagnoses with
Battery/Starting/Charging System Tester
(Cont’d)

H

H

H

EL-56

Construction

SEL276VG

Service Data and Specifications (SDS)

ALTERNATOR

Type

LR1110-707J

HITACHI make

Nominal rating

V-A

12-110

Ground polarity

Negative

Minimum revolution under no-load

(When 13.5 volts is applied)

rpm

Less than 950

Hot output current

(When 13.5 volts is applied)

A/rpm

More than 34/1,300

More than 82/2,500

More than 105/5,000

Regulated output voltage

V

14.1 - 14.7

Minimum length of brush

mm (in)

6.0 (0.236)

Brush spring pressure

N (g, oz)

1.000 - 3.432

(102 - 350, 3.60 - 12.34)

Slip ring minimum outer diameter

mm (in)

26.0 (1.024)

Rotor (Field coil) resistance

Ω

2.31

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

IDX

CHARGING SYSTEM

EL-57

Check

CEL994

COMBINATION SWITCH

EL-58