Nissan Terrano model r20 series 2004. Instruction — part 371
YEL350D
STARTING SYSTEM
Construction (Cont’d)
SC-18
Magnetic Switch Check
Magnetic Switch Check
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Before starting to check, disconnect battery ground cable.
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Disconnect “M” terminal of starter motor.
1. Continuity test (between “S” terminal and switch body).
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No continuity ... Replace.
2. Continuity test (between “S” terminal and “M” terminal).
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No continuity ... Replace.
Pinion/Clutch Check
1. Check to see if pinion locks in one direction and rotates
smoothly in the opposite direction.
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If it does not lock (or locks) in either direction or unusual
resistance is evident ... Replace.
2. Check pinion movement
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If it is hard to move, apply grease or, if necessary, replace.
3. Check ball bearing.
Spin outer race of ball bearing to ensure that it turns smoothly
without binding.
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Abnormal resistance ... Replace.
SEL555E
SEL556E
YEL546D
YEL547D
YEL548D
STARTING SYSTEM
SC-19
4. Inspect pinion teeth.
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Replace pinion if teeth are worn or damaged. (Also check
condition of ring gear teeth.)
5. Inspect reduction gear teeth.
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Replace reduction gear if teeth are worn of damaged.
(Also check condition of armature shaft gear teeth.)
Brush Check
BRUSH
Check wear of brush.
Wear limit length:
Refer to SDS (SC-30).
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Excessive wear ... Replace.
BRUSH HOLDER
1. Perform insulation test between brush holder (positive side)
and its base (negative side).
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Continuity exists ... Replace.
2. Check brush to see if it moves smoothly.
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If brush holder is bent, replace it; if sliding surface is dirty,
clean.
Field Coil Check
1. Continuity test (between field coil positive terminal and positive
brushes).
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No continuity ... Replace field coil.
2. Insulation test (between field coil positive terminal and yoke).
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Continuity exists ... Replace field coil.
SEL014Z
YEL549D
YEL550D
SEL103E
STARTING SYSTEM
Pinion/Clutch Check (Cont’d)
SC-20
Armature Check
1. Continuity test (between two segments side by side).
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No continuity ... Replace.
2. Insulation test (between each commutator bar and shaft).
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Continuity exists ... Replace.
3. Check commutator surface.
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Rough ... Sand lightly with No. 500-600 emery paper.
4. Check diameter of commutator.
Commutator minimum diameter:
Refer to SDS (SC-30).
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Less than specified value ... Replace.
SEL625B
SEL104E
SEL020Z
SEL021Z
STARTING SYSTEM
SC-21
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