Generator Current

WARNING: This page is about a different car, the 2004 Mazda MPV, 2003 Mazda MPV, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

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

Verify that the battery is fully charged.
Verify that the drive belt deflection/tension is correct.
Disconnect the negative battery cable.
Connect a tester capable of reading 120 amps or above, between generator terminal "B" and the wiring harness connector.
Connect the negative battery cable.
Turn off all electrical loads. Start the engine. Increase engine speed to 2000-2500 RPM.

NOTE: Current required for generating power varies with electrical loads applied.

Turn headlights (high-beam), blower motor (high), rear window defroster and brake lights on and verify that the current reading increases. If generator terminal "B" current does not increase, repair or replace the generator if necessary.
Standard current (reference) See GENERATOR AMPERAGE table.
Measuring conditions:
- Room temperature: 68°F (20°C).
- Voltage: 13.5 volts.
- Engine hot.

GENERATOR AMPERAGE

Terminal "B" @ 1000 RPM - Amps

Terminal "B" @ 2000 RPM - Amps

⁽¹⁾ 0-90

⁽¹⁾ 0-105

⁽¹⁾	Lower limit of current must be more than zero amps.