GENERATOR INSPECTION[MZ-CD 1.6 (Y6)]

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Caution

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

Generator Warning Light

1.  Verify that the battery is fully charged.

2.  Verify that the drive belt deflection/tension is correct. (See DRIVE BELT INSPECTION[MZ-CD 1.6 (Y6)].)

3.  With the engine switch at ON, verify that the generator warning light illuminates.

•  If it does not illuminate, inspect the generator warning light and the wiring harness.

―  If the generator warning light and the wiring harness are normal, inspect the PCM.

4.  Verify that the generator warning light goes off after the engine is started.

•  If it does not go out, inspect the DTCs in the on-board diagnostic system.

Generator

Voltage

1.  Verify that the battery is fully charged.

2.  Verify that the drive belt deflection/tension is correct. (See DRIVE BELT INSPECTION[MZ-CD 1.6 (Y6)].)

3.  Turn off all electrical loads.

4.  Start the engine and verify that the generator rotates smoothly without any noise while the engine is running.

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

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Current

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.

2.  Verify that the drive belt deflection/tension is correct. (See DRIVE BELT INSPECTION[MZ-CD 1.6 (Y6)].)

3.  Disconnect the negative battery cable.

4.  Connect a tester capable of reading 120 A or more between generator terminal B and the wiring harness.

5.  Connect the negative battery cable.

6.  Turn off all electrical loads.

7.  Start the engine.

8.  Increase engine speed to 2,500 rpm.

Note

•  When the electrical load of the vehicle is low, specified current will not be verified although the generator is normal. In this case, increase the electrical load (by turning on the headlight and leave it for a while, then discharge the battery or by similar methods) and recheck.

•  When the generator itself or the ambient temperature are too high, specified current will also not be verified. In this case, cool down the generator and recheck.

9.  Turn the following electrical loads on and verify that the current reading increases more than the minimum value indicated below.

•  Headlights (high-beam)

•  Blower motor (high)

•  Rear window defroster

•  Stop lamp