Toyota 4Runner: Inspection

Toyota 4Runner Service Manual / Power Source / Network / 1gr-fe Battery / Charging / Generator / Inspection

INSPECTION

PROCEDURE

1. INSPECT GENERATOR WITH CLUTCH PULLEY

(a) Hold the center of the generator with clutch pulley and check that the outer ring turns counterclockwise and does not turn clockwise.

Text in Illustration

	Free
	Lock

If the result is not as specified, replace the generator with clutch pulley.

2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

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

Standard exposed length:

9.5 to 11.5 mm (0.374 to 0.453 in.)

Minimum exposed length:

4.5 mm (0.177 in.)

Text in Illustration

Length

If the brush length is less than the minimum, replace the generator brush holder assembly.

3. INSPECT GENERATOR ROTOR ASSEMBLY

(a) Check that the generator rotor bearing is not rough or worn.

If necessary, replace the generator rotor assembly.

(b) Check the generator rotor for an open circuit.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Slip ring - Slip ring	20°C (68°F)	2.3 to 2.7 Ω

Text in Illustration

Slip Ring

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Slip ring - Rotor core	Always	10 MΩ or higher

Text in Illustration

*1	Slip Ring
*2	Rotor Core

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

(d) Using a vernier caliper, measure the slip ring diameter.

Standard diameter:

14.2 to 14.4 mm (0.559 to 0.567 in.)

Minimum diameter:

14.0 mm (0.551 in.)

Text in Illustration

Diameter

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

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