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GENERATOR INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]

GENERATOR INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]

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Caution
•  Do not apply direct battery positive voltage to generator terminal 2B, otherwise it could cause damage to the internal parts (power transistor) of the generator.

Charging System Warning Light

1.  Verify that the battery is fully charged. (See BATTERY INSPECTION [(E)].)

2.  Verify that the assembly condition of the drive belt is normal. (See DRIVE BELT INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

3.  Switch the ignition ON (engine off), verify that the charging system warning light illuminates.

•  If it does not illuminate, inspect the charging system warning light and the wiring harness.
―  If the charging system warning light and the wiring harness are normal, inspect the PCM. (See PCM INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

4.  Verify that the charging system warning light turns off after the engine is started.

•  If the charging system warning light does not turn off, perform the DTC inspection, then perform troubleshooting according to the corresponding diagnostic procedure. (See DTC INSPECTION.) (See DTC TABLE [PCM (SKYACTIV-G (E))].)


Generator


Generator voltage inspection

1.  Verify that the battery is fully charged. (See BATTERY INSPECTION [(E)].)

2.  Verify that the assembly condition of the drive belt is normal. (See DRIVE BELT INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

3.  Turn off all electrical loads.

4.  Start the engine.

5.  Verify that the generator rotates smoothly without any noise while the engine is running.

•  If there is any noise, find the cause and repair or replace the generator.

6.  Measure the voltage at each terminal using a tester.

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•  If not as specified, find the cause and repair or replace the applicable part.
Generator standard voltage [IG-ON]
Terminal 1A: B+
Terminal 2A: Approx. 1 V or less
Terminal 2B: Approx. 0 V
Generator standard voltage [Idle, 20 °C {68 °F}]
Terminal 1A: 13—15 V
Terminal 2A: Approx. 3—8 V
Terminal 2B: Turn the electrical loads (such as headlights, blower motor, rear window defogger, brake lights) on and verify that the voltage reading increases.


Generator current inspection

Note
•  Since the charging current decreases rapidly after starting the engine, carry out the following procedure quickly, and read the maximum current value.

1.  Verify that the battery is fully charged. (See BATTERY INSPECTION [(E)].)

2.  Verify that the assembly condition of the drive belt is normal. (See DRIVE BELT INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

3.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

4.  Connect a tester, which can read 120 A or more, between generator terminal B and generator terminal B cable.

5.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

6.  Turn off all electrical loads.

7.  Start the engine.

Note
•  When the electrical load on the vehicle is low, the specified current cannot be verified although the generator is normal. In this case, increase the electrical load (Leave the headlights turned on for a while, then discharge the battery, or use a similar method.) and recheck.
•  If the generator itself or the ambient temperature are too high, the specified current also cannot be verified. In this case, cool down the generator and recheck.

8.  With the electric loads such as headlights, blower motor, rear window defogger, brake lights turned on, verify that the current increases.

―  If not as specified, replace the generator. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

Generator generated current (reference value) [Ambient temperature: 20 °C {68 °F}, Engine hot]

Engine speed (rpm)

Terminal 1A voltage (V)

Generator output current (A)
1,000
13
83
1,000
15
83
2,000
13
98
2,000
15
105

* Field coil current control signal 100%


Generator Internal Parts


Rotor

1.  Measure the resistance between the slip rings using a ohmmeter.

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•  If not within specification, replace the generator.
Generator rotor resistance (between slip rings) [20 °C {68 °F}]
1.4—1.6 ohms


Stator coil

1.  Verify that the continuity is as indicated in the table.

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•  If there is any malfunction, replace the generator.
Generator stator coil resistance (between slip rings) [20 °C {68 °F}]
0.054—0.060 ohms


Brush

1.  Inspect brushes for wear.

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•  If any brush is worn almost to or beyond the limit, replace all of the brushes.
Generator brush length
Minimum: 10.0 mm {0.39 in}


Rectifier (Using an analog circuit tester)

1.  Inspect for continuity of the diodes using an analog circuit tester.

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•  If not as specified, replace the generator.

Specification

Positive

Negative

Continuity
P1, P2, P3, P4, P5, P6
B
Yes
B
P1, P2, P3, P4, P5, P6
No

2.  Inspect for continuity of the diodes using an analog circuit tester.

•  If not as specified, replace the generator.

Specification

Positive

Negative

Continuity
E
P1, P2, P3, P4, P5, P6
Yes
P1, P2, P3, P4, P5, P6
E
No


Rectifier (Using a digital circuit tester)

1.  Inspect for continuity of the diodes using a digital circuit tester.

•  If not as specified, replace the generator.

Specification

Positive

Negative

Continuity
P1, P2, P3, P4, P5, P6
B
No
B
P1, P2, P3, P4, P5, P6
Yes

2.  Inspect for continuity of the diodes using a digital circuit tester.

•  If not as specified, replace the generator.

Specification

Positive

Negative

Continuity
E
P1, P2, P3, P4, P5, P6
No
P1, P2, P3, P4, P5, P6
E
Yes