Alternator: Testing and Inspection

FA20 BATTERY / CHARGING: GENERATOR: INSPECTION; 2013 MY FR-S [03/2012 -]

1. INSPECT BRUSH

(a) Using a vernier caliper, measure the brush length.









Standard length:

22.5 mm (0.885 in)

Minimum length:

5.0 mm (0.196 in)

If the brush length is less than the minimum, replace the brush.

2. INSPECT GENERATOR COIL ASSEMBLY

(a) Check the resistance.









(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the generator coil assembly.

(b) Check the resistance.









(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the generator coil assembly.

3. INSPECT GENERATOR ROTOR ASSEMBLY

(a) Check the generator rotor assembly for open circuits.









(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the generator rotor assembly.

(b) Check if the generator rotor assembly is grounded.









(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the generator rotor assembly.

(c) Check the slip ring diameter.

(1) Using a vernier caliper, measure the diameter of each slip ring.









Standard diameter:

22.7 mm (0.893 in.)

Minimum diameter:

22.1 mm (0.870 in.)

If the diameter is less than the minimum, replace the generator rotor assembly.

4. INSPECT GENERATOR HOLDER WITH RECTIFIER

(a) Check the resistance.





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the generator holder with rectifier.