Infiniti Q45. Manual — part 792
STARTING SYSTEM
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C
D
E
F
G
H
I
J
L
M
A
B
SC
DIAGNOSTIC PROCEDURE 1
Check “B” Terminal Circuit
1.
CHECK “B” TERMINAL CIRCUIT
1.
Remove fuel pump fuse.
2.
Crank or start the engine (where possible) until the fuel pressure is released.
3.
Turn ignition switch OFF.
4.
Make sure that starter motor “B” terminal E313 terminal 2 (B/R) connection is clean and tight.
5.
Check voltage between starter motor “B” terminal E313 terminal
2 (B/R) and ground.
OK or NG
OK
>> GO TO 2.
NG
>> Check harness between battery and starter motor for
open circuit.
2.
CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
Check voltage between starter motor B terminal E313 terminal 2 (B/
R) and battery positive terminal.
OK or NG
OK
>> GO TO 3.
NG
>> Check harness between the battery and the starter
motor for poor continuity.
3.
CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1.
Turn ignition switch OFF.
2.
Check voltage between starter motor case and battery negative
terminal.
OK or NG
OK
>> “B” terminal circuit is OK. Further inspection necessary.
Refer to
.
NG
>> Check the starter motor case and ground for poor conti-
nuity.
2 (B/R) – Ground
: Battery voltage
PKIA2842E
2 (B/R) – Battery positive terminal
When the ignition switch is
in START position
: Less than 0.5 V
PKIA2370E
Starter motor case – Battery negative terminal
When the ignition switch is
in START position
: Less than 0.2 V
PKIA2943E
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STARTING SYSTEM
DIAGNOSTIC PROCEDURE 2
Check “S” Connector Circuit
1.
CHECK “S” CONNECTOR CIRCUIT
1.
Remove fuel pump fuse.
2.
Crank or start the engine (where possible) until the fuel pressure is released.
3.
Turn ignition switch OFF.
4.
Disconnect starter motor connector.
5.
Check voltage between starter motor harness connector E312
terminal 1 (R) and ground.
OK or NG
OK
>> “S” connector circuit is OK. Further inspection neces-
NG
>> Check the following.
●
50 A fusible link (letter G , located in fuse, fusible link
and relay block)
●
Ignition switch
●
Park/neutral position relay
●
Harness for open or short
MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERA-
TURE
Removal and Installation
NKS0016Q
REMOVAL
1.
Disconnect the battery cable from the negative terminal.
2.
Remove engine undercover.
3.
Disconnect starter motor connector.
4.
Remove “B” terminal nut.
5.
Remove engine mounting insulator (right side). Refer to
6.
Remove starter motor mounting bolt and nut.
7.
Remove starter motor to the direction of under side the vehicle.
INSTALLATION
Installation is the reverse order of removal.
CAUTION:
Be sure to tighten B terminal nut carefully.
1 (R) – Ground
When the ignition switch is in
START position
: Battery voltage
PKIA2807E
Engine coolant temperature
Voltage [V]
−
30
°
C to
−
20
°
C (
−
22
°
F to
−
4
°
F)
8.6
−
19
°
C to
−
10
°
C (
−
2
°
F to 14
°
F)
9.1
−
9
°
C to 0
°
C (16
°
F to 32
°
F)
9.5
More than 1
°
C (More than 34
°
F)
9.9
PKIB0636E
STARTING SYSTEM
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C
D
E
F
G
H
I
J
L
M
A
B
SC
Disassembly and Assembly
NKS0016R
Inspection After Disassembly
NKS0016S
PINION/CLUTCH CHECK
1.
Inspect pinion teeth.
●
Replace pinion if teeth are worn or damaged. (Also check condition of ring gear teeth.)
2.
Inspect reduction gear teeth.
●
Replace reduction gear if teeth are worn or damaged. (Also check condition of armature shaft gear
teeth.)
3.
Check if pinion locks in one direction and rotates smoothly in the opposite direction.
●
If it locks or rotates in both directions, or unusual resistance is evident, replace.
1.
Magnetic switch assembly
2.
Adjusting plate
3.
Packing
4.
Plate
5.
Shift lever
6.
Sleeve bearing
7.
Gear case
8.
Yoke
9.
Armature
10. Washer
11.
Rear bearing
12. Brush holder assembly
13. Rear cover
14. Cover
15. Packing
16. Ball
17. Planetary gear
18. Pinion shaft
19. Thrust washer
20. Internal gear
21. Pinion assembly
22. Pinion stopper
23. Stopper clip
PKIB0269E
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CHARGING SYSTEM
CHARGING SYSTEM
PFP:00011
System Description
NKS0016T
DESCRIPTION
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times
●
through 15A fuse [No. 56, located in the fuse, fusible link and relay block (J/B)]
●
to alternator terminal 4 (“S” terminal).
“B” terminal supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is
controlled by the IC regulator at terminal 4 (“S” terminal) detecting the input voltage.
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied
●
through 10A fuse [No. 9, located in the fuse block (J/B) No.1]
●
to combination meter terminal 59 for the charge warning lamp.
Ground is supplied
●
to combination meter terminal 13
●
through alternator terminal 3 (“L” terminal)
●
to alternator terminal 2 (“E” terminal)
●
through ground E307.
The charge warning lamp will illuminate. When the alternator is providing sufficient voltage with the engine
running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
MALFUNCTION INDICATOR
The IC regulator warning function activates to illuminate the charge warning lamp, if any of the following symp-
toms occur while alternator is operating:
●
Excessive voltage is produced.
●
No voltage is produced.
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