Infiniti F50. Manual - part 742

CHARGING SYSTEM

SC-15

C

D

E

F

G

H

I

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L

M

A

B

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DIAGNOSTIC PROCEDURE 2
Check “B” Terminal Circuit

1. 

CHECK “B” TERMINAL CONNECTION

Check to see if “B” terminal is clean and tight.

OK or NG

OK

>> GO TO 2. Confirm repair by performing complete Battery/Starting/Charging system test.

NG

>> Repair “B” terminal connection.

2. 

CHECK ALTERNATOR “B” TERMINAL CIRCUIT

Check voltage between alternator B terminal E309 terminal 1 (B/R)
and ground using a digital circuit tester.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between alternator and

battery.

3. 

CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)

1.

Start the engine.

2.

When the engine running at idle and warm, check voltage
between alternator B terminal E309 terminal 1 (B/R) and battery
positive terminal using a digital circuit tester.

OK or NG

OK

>> Replace the alternator. Confirm repair by performing

complete Battery/Starting/Charging system test.

NG

>> Check harness between the battery and the alternator

for poor continuity.

Battery voltage should exist.

PKIA2367E

Voltage: Less than 0.2 V

PKIA2366E

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CHARGING SYSTEM

DIAGNOSTIC PROCEDURE 3
Check “L” Terminal Circuit

1. 

CHECK “L” TERMINAL CONNECTION

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

OK or NG

OK

>> GO TO 2.

NG

>> Repair “L” terminal connection. Confirm repair by performing complete Battery/Starting/Charging

system test.

2. 

CHECK “L” TERMINAL CIRCUIT

1.

Disconnect alternator connector.

2.

Apply ground to alternator harness connector E310 terminal 3
(W/R) with the ignition switch in the ON position.

OK or NG

OK

>> Replace the alternator. Confirm repair by performing

complete Battery/Starting/Charging system test.

NG

>> Check the following.

●

10A fuse [No. 9, located in fuse block (J/B) NO.1]

●

CHARGE lamp

●

Harness for open or short between combination meter and fuse

●

Harness for open or short between combination meter and alternator

CHARGE lamp should light up.

SKIA0392E

CHARGING SYSTEM

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C

D

E

F

G

H

I

J

L

M

A

B

SC

DIAGNOSTIC PROCEDURE 4
Check “B” Terminal Circuit

1. 

CHECK “B” TERMINAL CONNECTION

Check to see if “B” terminal is clean and tight.

OK or NG

OK

>> GO TO 2. Confirm repair by performing complete Battery/Starting/Charging system test.

NG

>> Repair “B” terminal connection.

2. 

CHECK ALTERNATOR “B” TERMINAL CIRCUIT

Check voltage between alternator B terminal E309 terminal 1 (B/R)
and ground using a digital circuit tester.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between alternator and

battery.

3. 

CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)

1.

Start the engine.

2.

When the engine running at idle and warm, check voltage
between alternator B terminal E309 terminal 1 (B/R) and battery
positive terminal using a digital circuit tester.

OK or NG

OK

>> Go to 4.

NG

>> Check harness between the battery and the alternator

for poor continuity.

4. 

CHECK ALTERNATOR DRIVE BELT TENSION

1.

Turn ignition switch OFF.

2.

Check alternator drive belt tension. Refer to 

EM-12, "Checking Drive Belts"

  in “ENGINE MECHANI-

CAL(EM)” section.

YES or NO

YES

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

test.

NO

>> Readjust belt tension.

Battery voltage should exist.

PKIA2367E

Voltage: Less than 0.2 V

PKIA2366E

Does drive belt tension normal?

SC-18

CHARGING SYSTEM

DIAGNOSTIC PROCEDURE 5
Check “S” Terminal Circuit

1. 

CHECK “S” TERMINAL CONNECTION

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

OK or NG

OK

>> GO TO 2.

NG

>> Repair “S” terminal connection. Confirm repair by performing complete Battery/Starting/Charging

system test.

2. 

CHECK ALTERNATOR “S” TERMINAL CIRCUIT

Check voltage between alternator harness connector E310 terminal
4 (Y/B) and ground using a digital circuit tester.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

15A fuse [No. 56, located in fuse, fusible link and
relay block (J/B)]

●

Harness for open or short between alternator and
fuse

3. 

CHECK “S” TERMINAL CONNECTION (VOLTAGE DROP TEST)

1.

Start the engine.

2.

When the engine running at idle and warm, check voltage
between alternator harness connector E310 terminal 4 (Y/B)
and battery positive terminal using a digital circuit tester.

OK or NG

OK

>> Replace the alternator. Confirm repair by performing

complete Battery/Starting/Charging system test.

NG

>> Check harness between the battery and the alternator

for poor continuity.

MALFUNCTION INDICATOR

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

●

Excessive voltage is produced.

●

No voltage is produced.

Battery voltage should exist.

PKIA2582E

Voltage: Less than 0.2 V

SKIA0396E