Infiniti F50. Manual — part 745
STARTING SYSTEM
SC-27
C
D
E
F
G
H
I
J
L
M
A
B
SC
DIAGNOSTIC PROCEDURE 2
Check “S” Connector Circuit
1.
CHECK POWER SUPPLY FOR STARTER MOTOR “S” CONNECTOR
1.
Remove the fuel pump fuse.
2.
Crank or start the engine (where possible) until the fuel pressure is released.
3.
Turn the ignition switch OFF.
4.
Disconnect starter motor connector.
5.
Check voltage between starter motor harness connector E312
terminal 1 (R) and ground using a digital circuit tester.
OK or NG
OK
>> GO TO 2.
NG
>> Check the following.
●
50A fusible link (letter G , located in fuse, fusible link
and relay box)
●
Park/neutral position relay
●
Harness for open or short
2.
CHECK “S” TERMINAL CONNECTION (VOLTAGE DROP TEST)
1.
Connect starter motor connector.
2.
Check voltage between starter motor harness connector E312
terminal 1 (R) and battery positive terminal using a digital circuit
tester.
OK or NG
OK
>> Starter motor “S” connector circuit is OK. Further inspec-
tion necessary. Refer to
NG
>> Check harness between the battery and the starter
motor “S” connector for poor continuity.
MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERA-
TURE
When the ignition switch is in START position,
Battery voltage should exist.
SKIA0400E
When the ignition switch is in START position,
Voltage: Less than 1V
SKIA0401E
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
SC-28
STARTING SYSTEM
Removal and Installation
EKS000AD
REMOVAL
1.
Remove negative battery terminal.
2.
Remove engine undercover.
3.
Disconnect S connector.
4.
Remove B terminal nut.
5.
Remove starter motor mounting bolt and nut.
6.
Remove engine mounting insulator (right side). Refer to
in “ENGINE MECHANICAL (EM)” sec-
tion.
7.
Remove starter motor from under the vehicle.
INSTALLATION
Install in the reverse order of removal.
PKIA0163E
B terminal nut:
: 9.81 - 12.7 N·m (1.0 - 1.2 kg-m, 87 - 112 in-lb)
Starter motor mounting nut:
: 41.2 - 52.0 N·m (4.2 - 5.3 kg-m, 31 - 38 ft-lb)
Starter motor mounting bolt:
: 41.2 - 52.0 N·m (4.2 - 5.3 kg-m, 31 - 38 ft-lb)
STARTING SYSTEM
SC-29
C
D
E
F
G
H
I
J
L
M
A
B
SC
Disassembly and Assembly
EKS000AE
Inspection After Disassembly
EKS000AF
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 to see 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.
Sleeve bearing
2.
Gear case
3.
Stopper clip
4.
Pinion stopper
5.
Pinion assembly
6.
Internal gear
7.
Plate
8.
Packing
9.
Adjusting plate
10. Magnetic switch assembly
11. Planetary gear
12. Ball
13. Packing
14. Yoke
15. Armature
16. Washer
17. Rear bearing
18. Brush holder assembly
19. Brush spring
20. Brush (-)
21. Rear cover
22. Cover
Through bolt:
: 5.6 - 10.4 N·m (0.57 - 1.06 kg-m, 49.5 - 92.0 in-lb)
PKIA0162E
SC-30
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
Battery
EKS0014C
Starter
EKS0014D
Alternator
EKS0014E
Type
80D23L
Capacity
12 V - 52 AH
Cold cranking current (For reference value)
582 A
Type
M2T85171
MITSUBISHI make
Reduction gear type
System voltage
12 V
No-load
Terminal voltage
11 V
Current
Less than 145 A
Revolution
More than 3,300 rpm
Minimum diameter of commutator
31.4 mm (1.236 in)
Minimum length of brush
11.0 mm (0.433 in)
Brush spring tension
30.9 - 37.7 N (3.15 - 3.85 kg, 6.95 - 8.47 lb)
Clearance between bearing metal and armature shaft
Less than 0.2 mm (0.008 in)
Clearance between pinion front edge and pinion stopper
0.5 - 2.0 mm (0.020 - 0.079 in)
Type
A3TG0391
MITSUBISHI make
Nominal rating
12 V - 110 A
Ground polarity
Negative
Minimum revolution under no-load (When 13.5 V is applied)
Less than 1,000 rpm
Hot output current (When 13.5 V is applied)
More than 31 A / 1,300 rpm
More than 90 A / 2,500 rpm
More than 102 A / 5,000 rpm
Regulated output voltage
14.1 - 14.7 V
Minimum length of brush
More than 5.00 mm (0.197 in)
Brush spring pressure
4.8 - 6.1 N (490 - 610 g, 17.28 - 21.51 oz)
Slip ring minimum outer diameter
More than 22.1 mm (0.870 in)
Rotor (Field coil) resistance
1.7 - 2.1
Ω
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