To test rotor for an open circuit, use ohmmeter to check for continuity between slip rings on end of rotor. See Fig 1 .
Continuity should exist and resistance should be within specification. See ROTOR SPECIFICATIONS table. Replace rotor if no continuity exists or resistance is not within specification. See OVERHAUL .
To test rotor for a grounded circuit, use an ohmmeter to check for no continuity between each slip ring and rotor. See Fig 1 . Replace rotor if continuity exists. See OVERHAUL .
Using caliper, measure outside diameter of each slip ring. See ROTOR SPECIFICATIONS table. Replace rotor if outside diameter is not within specification. See OVERHAUL .

ROTOR SPECIFICATIONS

Application

Specification

Rotor Resistance

Esteem, Grand Vitara & Vitara (85-Amp Generator)

2.9 Ohms

Swift

3.1-3.5 Ohms

Vitara (60- & 70-Amp Generator)

2.5-2.9 Ohms

Slip Ring Outside Diameter

Esteem

Standard

.567" (14.40 mm)

Wear Limit

.551" (14.00 mm)

Grand Vitara & Vitara (85-Amp Generator)

Standard

.557"-.567" (14.20-14.40 mm)

Wear Limit

.504" (12.80 mm)

Swift & Vitara (Except 85-Amp Generator)

⁽¹⁾

⁽¹⁾	Information is not available from manufacturer.

Fig 1: Testing Rotor For Open Or Grounded Circuits (Typical)

Courtesy of SUZUKI OF AMERICA CORP.

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.

Safety Warning

Bench Testing: Rotor