Home ReviewsRefund
Home/Infiniti/FX50/Infiniti FX50 II (2008-2012)/Repair manual/Starter/Starting System: Other
Contents Wiring diagrams Section: Starter All sections

Starting System: Other Infiniti FX50 II

Starter 8 illustrations ~752 words

DETAILED FLOW

Note. To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be done as a set from start to finish.

  1. DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER Perform the starting system test with Starting/Charging System Tester (SST: J-44373). For details and operating instructions, refer to Technical Service Bulletin. Test result CRANKING VOLTAGE NORMAL: GO TO 2 . CRANKING VOLTAGE LOW: GO TO 5 . CHARGE BATTERY: Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours). Perform battery test again. Refer to Technical Service Bulletin. REPLACE BATTERY: Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test again. Refer to Technical Service Bulletin. If second test result is "REPLACE BATTERY", then do so. Perform battery test again to confirm repair.
  2. CRANKING CHECK Check that the starter motor operates correctly. Does the engine crank normally? YES: GO TO 3 . NO: GO TO 4 .
  3. ENGINE START CHECK Check that the engine starts. Does the engine start? YES: Starter motor is OK. INSPECTION END NO: Perform further diagnosis of engine mechanical or engine control system. Refer to «ENGINE MECHANICAL (VK50VE)»(ref-368868) or «ENGINE MECHANICAL (VQ35HR)»(ref-368853) and «ENGINE CONTROL SYSTEM (VK50VE)»(ref-368885) or «ENGINE CONTROL SYSTEM (VQ35HR)»(ref-368856) . Once resolved, perform battery test again.
  4. STARTER MOTOR ACTIVATION Check that the starter motor operates. Does the starter motor turn? YES: Check ring gear and starter motor drive pinion. Once resolved, perform battery test again. NO: GO TO 7 .
  5. COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE Compare the engine coolant temperature and the cranking voltage with the specifications. Minimum Specification of Cranking Voltage Referencing Coolant Temperature ENGINE COOLANT TEMPERATURE TABLE Engine coolant temperature [°C (°F)] Voltage [V] -30 to -20 (-22 to -4) 8.6 -19 to -10 (-2 to 14) 9.1 -9 to 0 (16 to 32) 9.5 More than 1 (More than 34) 9.9 Is the voltage less than the specified value? YES: GO TO 7 . NO: GO TO 6 .
  6. STARTER OPERATION Check the starter operation status. Does the starter motor turn smoothly? YES: Starter motor is OK. INSPECTION END NO: GO TO 7 .
  7. "B" TERMINAL CIRCUIT INSPECTION Check "B" terminal circuit. Refer to «DIAGNOSIS PROCEDURE»(ref-368869-S38049732482010081300000) . Is "B" terminal circuit normal? YES: GO TO 8 . NO: Repair as needed.
  8. "S" CONNECTOR CIRCUIT INSPECTION Check "S" connector circuit. Refer to «DIAGNOSIS PROCEDURE»(ref-368869-S22695249202010081300000) . Is "S" connector circuit normal? YES: GO TO 9 . NO: Repair as needed.
  9. ENGINE ROTATION STATUS Check that the engine can be rotated by hand. Does the engine turn freely by hand? YES: Replace starter motor. NO: Perform further diagnosis of engine mechanical or powertrain mechanism. Once resolved, perform battery test again. Refer to Technical Service Bulletin.

Scheme 11

Scheme 11: System Diagram
Scheme 11: System Diagram

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SRS AIRBAG - FX35_FX50 and SEAT BELTS - FX35_FX50 articles.

WARNINGTo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS AIRBAG . Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Information. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Special Service Tools

SPECIAL SERVICE TOOLS REFERENCE Tool number (Kent-Moore No.) Tool name Description - (J-44373 Model MCR620) Starting/Charging System Tester Tests starting and charging systems. For operating instructions, refer to Technical Service Bulletin

Scheme 12

Scheme 12: Special Service Tools
Scheme 12: Special Service Tools

Commercial Service Tools

COMMERCIAL SERVICE TOOLS REFERENCE Tool name Description Power tool Loosening bolts, nuts and screws

Scheme 13

Scheme 13: REMOVAL
Scheme 13: REMOVAL

Refer to COMPONENTS for symbols in the graphic.

Scheme 14

Scheme 14
Scheme 14

Refer to COMPONENTS for symbols not described on the above.

Scheme 15

Scheme 15: Removal
Scheme 15: Removal

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18
Scheme 18
  1. Disconnect the battery cable from the negative terminal.
  2. Remove engine undercover using power tools.
  3. Remove "B" terminal nut (1).
  4. Disconnect "S" connector (1).
  5. Remove starter motor mounting bolts (A) and harness bracket (2), using power tools.
  6. Remove compressor bracket bolts (A).
  7. Remove compressor bracket (1).
  8. Remove A/T fluid cooler tube clip bolts and bracket. Refer to «2WD: EXPLODED VIEW»(ref-368864-S01897933672010081300000) .
  9. Move A/T fluid cooler tube (1) downward.
  10. Remove starter motor (2) forward from the vehicle.

Starter Motor

Applied modelVQ35HRVK50VE
TypeS114-927M001T30671
HITACHI makeMITSUBISHI make
Reduction gear type
System voltage[V]12
No-loadTerminal voltage[V]11
Current[A]Less than 110Less than 120
Revolution[RPM]More than 2,700More than 3,220
Minimum diameter of commutator[mm. (in)]28.0 (1.102)28.8 (1.134)
Minimum length of brush[mm. (in)]10.5 (0.413)10.0 (0.394)
Brush spring tension[N (kg, lb.)]16.2 (1.65, 3.6)23.4 - 31.6 (2.4, 5.3 - 3.2, 7.1)
Clearance between bearing metal and armature shaft[mm. (in)]Less than 0.2 (0.008)Less than 0.2 (0.008)
Clearance between pinion front edge and pinion stopper[mm. (in)]0.3 - 2.5 (0.012 - 0.098)0.5 - 2.0 (0.02 - 0.079)

STARTER MOTOR SPECIFICATION AND SERVICE DATA

More articles — Starting System