CX-9 AWD V6-3.7L (2008)
Alternator: Testing and Inspection
GENERATOR INSPECTION [MZI-3.7]
Generator Warning Light
1. Verify that the battery is fully charged.
2. Verify that the generator and A/C drive belt deflection/tension is correct.
3. With the ignition switch turned to the ON position, verify that the generator warning light illuminates.
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If it does not illuminate, inspect the generator warning light and the wiring harness.
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If the generator warning light and the wiring harness are normal, inspect the PCM.
4. Verify that the generator warning light goes out after the engine is started.
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If it does not go out, inspect if any DTCs are displayed.
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If any DTCs are displayed, carry out troubleshooting according to the corresponding DTC inspection.
Generator
Voltage
1. Verify that the battery is fully charged.
2. Verify that the generator and A/C drive belt deflection/tension is correct.
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.
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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 it is not as specified, find the cause and repair or replace the applicable part.
Generator standard voltage [IG-ON]
Terminal B: B+
Terminal A: B+
Terminal RC: Approx. 1 V or less
Terminal LI: Approx. 1 V
Generator standard voltage [Idle, 20 °C {68 °F}]
Terminal B: 12 - 16 V
Terminal A: 12 - 16 V
Terminal RC: 0 - 16 V
Terminal LI: 1 - 16 V
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 generator and A/C drive belt deflection/tension is correct.
3. Disconnect the negative battery cable.
4. Connect a tester, which can read 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.