Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Isuzu Trooper LS, RWDFACTORY OEM SERVICE PROCEDURE
Armature Test
- Measure the outer diameter of commutator, and replace with a new one if it is out of limit. See Fig 1 . See STARTER SPECIFICATIONS .
- Check for continuity between segment and segment. Replace commutator if there is no continuity. See Fig 2 .
- Check for continuity between commutator and shaft. Also, check for continuity between commutator and armature core, armature core and shaft. Replace commutator if there is continuity. See Fig 3 .
- Measure runout of armature core and commutator with a dial gauge. SeeFig 4 . Repair or replace, if it exceeds the limit. See STARTER SPECIFICATIONS .
- Polish commutator surface with sandpaper #500 to #600 if it is rough. See Fig 5 .
- Measure the depth of insulator in commutator. Replace, if it is below the limit. See Fig 6 . See STARTER SPECIFICATIONS .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.