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Starters: Other Nissan Sentra B15

Starter 1 illustration ~656 words

M/T MODEL

Power is supplied at all times through 40-amp fusible link (letter "C", located in the fuse and fusible link box) to ignition switch terminal "B".

With the ignition switch in the "START" position, power is supplied from ignition switch terminal "ST" to clutch interlock relay terminal No. 5.

With the ignition switch in the "ON" or "START" position, power is supplied through 10-amp fuse [No. 20, located in the fuse block (J/B)], to clutch interlock relay terminal No. 1.

When the clutch pedal is depressed, ground is supplied to clutch interlock relay terminal No. 2 through the clutch interlock switch and body grounds E7 and E37.

The clutch interlock relay is energized and power is supplied from terminal No. 3 of the clutch interlock relay to terminal "S" of the starter motor windings.

The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.

A/T MODEL

Power is supplied at all times through 40-amp fusible link (letter "C", located in the fuse and fusible link box) to ignition switch terminal "B".

With the ignition switch in the "START" position, power is supplied from ignition switch terminal "ST" to park/neutral position relay terminal No. 5.

With the ignition switch in the "ON" or "START" position, power is supplied through 10-amp fuse [No. 20, located in the fuse block (J/B)], to park/neutral position relay terminal No. 1.

With the selector lever in the "P" or "N" position, ground is supplied to park/neutral position relay terminal No. 2 through park/neutral position switch.

The park/neutral position relay is energized and power is supplied from ignition switch terminal "ST" through park/neutral position relay terminals No. 3 and 5 to terminal "S" of the starter motor windings.

The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.

2003

For 2003 component locations, see ELECTRICAL COMPONENT LOCATOR article in ELECTRICAL.

2004

For 2004 component locations, see ELECTRICAL COMPONENT LOCATOR article in ELECTRICAL.

WORK FLOW

Note. For minimum specification of cranking voltage referencing coolant temperature, see MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERATURE .

Scheme 6

Scheme 6: WORK FLOW
Scheme 6: WORK FLOW

PINION/CLUTCH CHECK

  1. Inspect pinion assembly teeth. Replace pinion assembly if teeth are worn or damaged. Also check condition of ring gear teeth.
  2. Inspect planetary gears/planetary gear teeth. Replace planetary gears/planet gears if teeth are worn or damaged. Also check condition of pinion shaft/drive shaft gear teeth.
  3. Check to see if pinion assembly locks in one direction and rotates smoothly in the opposite direction. If it locks or rotates in both directions, or if unusual resistance is evident, replace.

BRUSHES & SPRINGS

Check brush spring tension, contact surface condition and brush length. Check lead clip and wire connections. Check condition of brush holders. See STARTER SPECIFICATIONS .

COMMUTATOR

Inspect commutator for roughness, grooves, burns, pitting and out-of-round. If necessary, sand lightly with 500-600 grit sandpaper. If mica insulator undercut is less than .008 in. (.20 mm), undercut to .020-.031 in. (.50-.80 mm). Replace armature if commutator diameter is less than specified. See STARTER SPECIFICATIONS .

1.8L (QG18DE)

  1. Disconnect the negative battery terminal.
  2. Remove the upper starter mounting bolt.
  3. Remove the harness protector from the starter engine room harness. Disconnect the starter harness connectors.
  4. Remove the lower starter mounting bolt. Remove the starter.
  5. To install, reverse the removal procedure. Tighten bolt/nuts to specification. See «TORQUE SPECIFICATIONS»(ref-166421-S10109505902004092000000) .

2.5L (QR25DE)

  1. Disconnect the negative and positive battery cables.
  2. Remove the engine undercover (M/T) or the air duct, fresh air intake hose, and air cleaner lid (A/T). See «COMPONENT LOCATIONS»(ref-166421-S21021219642004092000000) .
  3. Disconnect the starter harness connectors.
  4. Remove the two starter mounting bolts. Remove the starter.
  5. To install, reverse the removal procedure. Tighten bolt/nuts to specification. See «TORQUE SPECIFICATIONS»(ref-166421-S10109505902004092000000) .

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