Infiniti QX4 (R50). Manual — part 544
SEL420X
9.
Press “ENTER” to continue.
SEL421X
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 con-
tinue.
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.
SEL422X
11. Diagnostic result is displayed on the tester. Refer to “DIAG-
NOSTIC RESULT ITEM CHART”, SC-23.
SEL577X
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.
CHARGING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-22
DIAGNOSTIC RESULT ITEM CHART
NBSC0020S01
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-24.
LOW CHARGING VOLTAGE
Go to “WORK FLOW”, SC-24.
HIGH CHARGING VOLTAGE
Go to “WORK FLOW”, SC-24.
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-24.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL
IDX
CHARGING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-23
WORK FLOW
NBSC0020S02
SEL423X
CHARGING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-24
DIAGNOSTIC PROCEDURE 1
NBSC0020S03
Check “L” Terminal Circuit
NBSC0020S0301
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 E106 connector from alternator.
2. Apply ground to E106 connector terminal 1 with the ignition switch in the ON position.
SEL424X
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. 8, 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
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL
IDX
CHARGING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-25
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