Infiniti Q45. Manual — part 794
CHARGING SYSTEM
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C
D
E
F
G
H
I
J
L
M
A
B
SC
PRELIMINARY INSPECTION
1.
CHECK BATTERY TERMINALS CONNECTION
Check if battery terminals is clean and tight.
OK or NG
OK
>> GO TO 2.
NG
>> Repair battery terminals connection.
2.
CHECK FUSE AND FUSIBLE LINK
Check for blown fuse and fusible link.
OK or NG
OK
>> GO TO 3.
NG
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
3.
CHECK “E” TERMINAL CONNECTION
Check if “E” terminal is clean and tight.
OK or NG
OK
>> GO TO 4.
NG
>> Repair “E” terminal connection.
4.
CHECK ALTERNATOR DRIVE BELT TENSION
Check alternator drive belt tension. Refer to
OK or NG
OK
>> INSPECTION END
NG
>> Repair as needed.
Unit
Power source (Power supply terminals)
Fuse and fusible link No.
Alternator
Battery (“S” terminal)
56
Combination meter
Ignition switch ON (“L” terminal)
9
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CHARGING SYSTEM
DIAGNOSTIC PROCEDURE 1
Check “L” Terminal Circuit (Open)
1.
CHECK “L” TERMINAL CONNECTION
1.
Turn ignition switch OFF.
2.
Check 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 (OPEN)
1.
Disconnect alternator connector.
2.
Apply ground to alternator harness connector E310 terminal 3
(G) with the ignition switch in the ON position.
OK or NG
OK
>> Go to
.
NG
>> Check the following.
●
Harness for open between combination meter and
alternator
●
Harness for open between combination meter and
fuse
●
Charge warning lamp (Combination meter)
DIAGNOSTIC PROCEDURE 2
Check “L” Terminal Circuit (Short)
1.
CHECK “L” TERMINAL CIRCUIT (SHORT)
1.
Turn ignition switch OFF.
2.
Disconnect alternator connector.
3.
Turn ignition switch ON.
CHARGE lamp should light up?
YES
>> Check the following.
●
Harness for short between combination meter and alternator
●
Charge warning lamp (Combination meter)
NO
>> Go to
.
3 (G) – Ground
: CHARGE lamp should light up.
SKIB0656E
CHARGING SYSTEM
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C
D
E
F
G
H
I
J
L
M
A
B
SC
DIAGNOSTIC PROCEDURE 3
Check “S” Terminal Circuit
1.
CHECK “S” TERMINAL CONNECTION
1.
Turn ignition switch OFF.
2.
Check 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 “S” TERMINAL CIRCUIT
Check voltage between alternator harness connector E310 terminal
4 (P) and ground.
OK or NG
OK
NG
>> Check harness for open between alternator and fuse.
4 (P) – Ground
: Battery voltage
SKIB0657E
SC-24
CHARGING SYSTEM
DIAGNOSTIC PROCEDURE 4
Check “B” Terminal Circuit
1.
CHECK “B” TERMINAL CONNECTION
1.
Turn ignition switch OFF.
2.
Check if “B” terminal is clean and tight.
OK or NG
OK
>> GO TO 2.
NG
>> Repair “B” terminal connection. Confirm repair by performing complete Battery/Starting/Charging
system test.
2.
CHECK “B” TERMINAL CIRCUIT
Check voltage between alternator “B” terminal E309 terminal 1 (B/R)
and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Check harness for open between alternator and fusible
link.
3.
CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)
1.
Start engine.
2.
When engine running at idle and warm, check voltage between
alternator “B” terminal E309 terminal 1 (B/R) and battery positive
terminal.
OK or NG
OK
>> Go to
.
NG
>> Check harness between battery and alternator for poor
continuity.
1 (B/R) – Ground
: Battery voltage
PKIA2944E
1 (B/R) – Battery positive terminal
: Less than 0.2 V
PKIA2366E
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