Generator Inspection: Generator: Current

WARNING: This page is about a different car, the 2005 Mazda 6. 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, perform the following procedure quickly, and read the maximum current value.

Verify that the battery is fully charged.
- Charge if necessary.
Verify that the drive belt deflection/tension is within the specification. (L3) (See DRIVE BELT INSPECTION [L3] .)
Disconnect the negative battery cable.
Connect a tester cable of reading 120 A or more between generator terminal B and the wiring harness.
Turn off all electrical loads.
Start the engine and increase the engine speed to 2,000-2,500 rpm.

Turn the following electrical loads on and verify that the current reading increases.

Headlights
Blower motor
Rear window defroster
- If generator terminal B current does not increase, repair or replace the generator if necessary.

NOTE:

Current required for generating power varies with electrical loads applied.

Standard current (Reference)

Measuring conditions:

Room temperature: 20 °C {68 °F}

Voltage: 13.5 V

Engine hot

ENGINE SPEED SPECIFICATION

Engine speed (rpm)

Terminal B current (A)⁽¹⁾

1,000

0⁽¹⁾-80

0⁽¹⁾-90

2,000

0⁽¹⁾-100

0⁽¹⁾-105

⁽¹⁾	Lower limit of current must be more than 0 A.