Infiniti G20 (P11). Manual — part 518
Trouble Diagnoses with
Battery/Starting/Charging System Tester
NCSC0019
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.
SEL408X
1.
Turn off all loads on the vehicle electrical system.
2.
Perform battery test with Battery/Starting/Charging system
tester. Refer to SC-7.
3.
Press “ENTER” to begin the starting system test.
SEL409X
4.
Start the engine.
SEL410X
5.
Diagnosis result is displayed on the tester. Refer to “DIAG-
NOSTIC RESULT ITEM CHART”, SC-14.
NOTE:
I
If the starter performs normally but the engine does not start,
perform engine diagnosis.
I
For intermittent “NO CRANK” or “NO STARTER OPERATION”
incidents, go to DIAGNOSTIC PROCEDURE 2.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
EL
IDX
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester
SC-13
DIAGNOSTIC RESULT ITEM CHART
NCSC0019S01
Diagnostic item
Service procedure
CRANKING VOLTAGE NORMAL
Go to “WORK FLOW”, SC-15.
CRANKING VOLTAGE LOW
Go to “WORK FLOW”, SC-15.
CHARGE BATTERY
Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours.)
Perform battery test again with Battery/Starting/Charging system tester. Refer to SC-7.
REPLACE BATTERY
Before replacing battery, clean the battery cable clamps and battery posts. Perform battery
test again with Battery/Starting/Charging system tester. Refer to SC-7. If second test result
is “REPLACE BATTERY”, then do so. Perform battery test again to confirm repair.
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-14
WORK FLOW
NCSC0019S02
SEL411X
*1
*2
*3
*4
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
EL
IDX
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-15
DIAGNOSTIC PROCEDURE 1
NCSC0019S03
Check “B” Terminal Circuit
NCSC0019S0301
1
CHECK POWER SUPPLY FOR STARTER MOTOR “B” TERMINAL
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition OFF.
4. Check that the starter motor connector E117 terminal 1 (B/R) connection is clean and tight.
5. Check voltage between starter motor connector E117 terminal 1 (B/R) and ground using a digital circuit tester.
SEL945X
OK or NG
OK
©
GO TO 2.
NG
©
Check harness between the battery and the starter motor for open circuit.
2
CHECK BATTERY CABLE CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Check voltage between starter motor connector E117 terminal 1 (B/R) and battery positive terminal using a digital cir-
cuit tester.
SEL946X
OK or NG
OK
©
GO TO 3.
NG
©
Check harness between the battery and the starter motor for poor continuity.
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-16
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