DESCRIPTION
Mitsuba and Nippondenso starters are 12-volt, 4-brush, solenoid-actuated, gear reduction-type, equipped with an overrunning clutch. The brush holder assembly retains brushes and springs in the starter housing.
No Load Test
- Remove starter. Connect ammeter in series with starter motor and 12-volt battery. (Scheme 1) Connect voltmeter in parallel with battery and observe readings.
- Starter should spin smoothly at 3000 RPM or more with current draw less than 90 amps at 11.5 volts.
Ammeter & Voltmeter Hook-Up for No Load Test. Scheme 1
Brushes & Springs
- Check brush length. If less than specification, replace brushes. See «MINIMUM BRUSH LENGTH SPECIFICATIONS»(/toyota/mr2/w10-1984-1990/remont/starter/#starter-reduction-gear) table.
- Check condition of brush holders, springs, spring clip and insulation between positive and negative holders and repair or replace as needed.
| Application | In. (mm) |
|---|---|
| Camry & Celica | .33 (8.5) |
| Toyota Diesel Engine | .47 (12.0) |
| All Others | .39 (10.0) |
MINIMUM BRUSH LENGTH SPECIFICATIONS
Commutator
- If out-of-round is more than .002" (.05 mm), turn the commutator on a lathe until out-of-round is within specification.
- Wear or cutting limit of commutator is 1.22" (31.0 mm) for Cressida and Supra, 1.08" (27.5 mm) on Mitsuba starters or 1.14" (29.0 mm) for all others.
- If worn less than .008" (.20 mm), insulating mica should be undercut to a depth of approximately .028-.035" (.71-.89 mm) on Toyota diesel models, or .015-.031" (.40-.80 mm) on all other models.
Armature Coil
- Check commutator and armature coil core for continuity. If continuity exists, replace armature. Check armature with a growler for shorts. Replace if shorted.
- Check for continuity between segments on commutator. If no continuity exists, replace armature.
Field Coil
Check field coil for open circuits. There should be continuity between lead wire and field coil brush lead. If not, replace field coil. Check for continuity between field coils and end frame. If continuity exists, replace field coil.
Solenoid Pull-In Coil Test
Connect 2 battery negative leads to main terminal ("C") and ground. Connect a 12-volt battery positive lead to solenoid "ST" terminal (terminal "50"). (Scheme 2) Plunger should extend firmly. If not, replace solenoid.
Solenoid Pull-In Coil Test Connect battery positive to "ST" terminal (terminal "50"). Scheme 2
Solenoid Hold-In Coil Test
After pull-in testing, disconnect battery negative lead from main terminal ("C"). Plunger should remain extended. If not, replace solenoid. (Scheme 2)
TROUBLE SHOOTING
Note. See TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.
OVERHAUL
Note. No overhaul proceedures are given. For overhaul reference (Scheme 3)and (Scheme 4).
