Infiniti F50. Manual — part 741
CHARGING SYSTEM
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Trouble Diagnosis with Battery/Starting/Charging System Tester
EKS00148
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.
Turn off all loads on the vehicle electrical system.
2.
Perform battery and starting system test with Battery/Starting/
Charging system tester.
3.
Press “ENTER” to begin the charging system test.
4.
Start engine.
5.
Press “ENTER” until “LOADS OFF REV ENGINE 5 SEC” is dis-
played.
6.
Raise and hold the engine speed at 1,500 to 2,000 rpm for about
5 seconds, then return to the engine to idle.
Once the increase in engine rpm is detected, press “ENTER” to
continue.
NOTE:
●
If after 30 seconds an increase in engine idle speed is not
detected, “RPM NOT DETECTED” will display.
●
Some engines may have a higher idle initially after starting, par-
ticularly when the engine is cold. The tester may detect this with-
out any other action being taken. If this occurs, continue on with
the testing process. The final results will not be affected.
7.
The tester now checks the engine at idle and performs the
DIODE/RIPPLE check.
8.
When complete, the tester will prompt you to turn on the follow-
ing electrical loads.
●
Heater fan set to highest. Do not run the A/C or windshield
defroster.
●
Headlamp high beam
●
Rear window defogger
NOTE:
Do not run the windshield wipers or any other cyclical loads.
9.
Press “ENTER” to continue.
SEL417X
SEL418X
SEL419X
SEL420X
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CHARGING SYSTEM
10. Raise and hold the engine speed at 1,500 to 2,000 rpm for about
5 seconds, then return the engine to idle. Once the increase in
engine rpm is detected, press “ENTER” to continue.
NOTE:
If after 30 seconds an increase in engine idle speed is not detected,
“RPM NOT DETECTED” will be displayed. Press “ENTER” to restart
the test.
11. Diagnostic result is displayed on the tester. Refer to
"DIAGNOSTIC RESULT ITEM CHART"
.
12. Press “ENTER” then test output code is displayed. Record the
test output code on the repair order.
13. Toggle back to the “DIAGNOSTIC SCREEN” for test results.
DIAGNOSTIC RESULT ITEM CHART
SEL421X
SEL422X
SEL577X
Diagnostic item
Service procedure
CHARGING SYSTEM NORMAL
Charging system is normal and will also show DIODE RIPPLE test result.
NO CHARGING VOLTAGE
Go to
.
LOW CHARGING VOLTAGE
Go to
.
HIGH CHARGING VOLTAGE
Go to
.
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
.
CHARGING SYSTEM
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WORK FLOW
PKIA2226E
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CHARGING SYSTEM
DIAGNOSTIC PROCEDURE 1
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
>> Go to
.
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
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