Infiniti G20 (P11). Manual - part 521

DIAGNOSTIC RESULT ITEM CHART

NCSC0020S01

Diagnostic item

Service procedure

CHARGING SYSTEM NORMAL

Charging system is normal and will also show DIODE RIPPLE test result.

NO CHARGING VOLTAGE

Go to “WORK FLOW”, SC-26.

LOW CHARGING VOLTAGE

Go to “WORK FLOW”, SC-26.

HIGH CHARGING VOLTAGE

Go to “WORK FLOW”, SC-26.

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 Battery/Starting/
Charging system tester to confirm repair.

DIODE RIPPLE NOT DETECTED

Go to “WORK FLOW”, SC-26.

GI

MA

EM

LC

EC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

EL

IDX

CHARGING SYSTEM

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

SC-25

WORK FLOW

NCSC0020S02

SEL423X

CHARGING SYSTEM

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

SC-26

DIAGNOSTIC PROCEDURE 1

NCSC0020S03

Check “L” Terminal Circuit

NCSC0020S0301

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 connector E106 terminal 3 (Y/R) with the ignition switch in the ON position.

SEL950X

OK or NG

OK

©

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

NG

©

Check the following.

I

10A fuse [No. 11, 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

GI

MA

EM

LC

EC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

EL

IDX

CHARGING SYSTEM

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

SC-27

DIAGNOSTIC PROCEDURE 2

=NCSC0020S04

Check “B” Terminal Circuit

NCSC0020S0401

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 connector E107 terminal B (W) and ground using a digital circuit tester.

SEL951X

OK or NG

OK

©

GO TO 3.

NG

©

Check the following.

I

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

I

Harness for open or short between alternator and fusible link

3

CHECK “B” TERMINAL CONNECTION QUALITY (VOLTAGE DROP TEST)

Check voltage between alternator connector E107 terminal B (W) and battery positive terminal using a digital tester.

SEL952X

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.

CHARGING SYSTEM

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

SC-28