SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 103 (GENERATORS & REGULATORS)BENCH TESTINGROTOR
1999 Mazda 626 ES, 2.5 D, Standard

Bench Testing: Rotor

1999 Mazda 626 ES, 2.5 D, StandardSECTION Rotor
WARNING: This page is about a different car, the 2004 Mazda 6 and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using DVOM, measure the resistance between the slip rings. See Fig 1. On 2.3L models, if resistance is 1.6-2.0 ohms at 68°F (20°C), go to next step. If resistance is not 1.6-2.0 ohms at 68°F (20°C), replace rotor. On 3.0L models, if resistance is 2.4-2.9 ohms at 68°F (20°C), go to next step. If resistance is not 2.4-2.9 ohms at 68°F (20°C), replace rotor.
  2. Using DVOM, verify there is no continuity between the slip ring and core. See Fig 2. If continuity does not exist, go to next step. If continuity exists, replace the rotor.
  3. Inspect the slip ring surface condition. If slip ring surface is rough, use a lathe or fine sandpaper to repair.
Fig 1: Measuring Resistance Between Slip Rings (Typical)
G00211654Courtesy of SUBARU OF AMERICA, INC.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.