Generator Inner Parts - Mazda CX-7 2007 Workshop Manual

Step
5 Monitor the ALTF PID using the M-MDS, or calculate the
duty value of the PCM terminal 2AI using an oscilloscope.
Is the duty value 0 % ?
0V
*1
: Headlights, blower motor, rear window defroster, and brake lights.
*2
: If the generator field coil duty value does not change when electrical loads (such as headlights, blower motor,
rear window defroster, brake lights) are on or off, inspection with discharged battery is needed.

Generator Inner Parts

Rotor
1. Measure the resistance between the slip rings
using a tester.
• If not within the specification, replace the
rotor.
Generator rotor resistance (between slip
rings) [20 °C {68 °F}]
1.8— 2.2 ohm
2. Verify that there is no continuity between the slip
ring and core using a tester.
• If there is continuity, replace the rotor.
3. Inspect the slip ring surface condition.
• If the slip ring surface is rough, use a lathe or
fine sandpaper to smooth it.
01-17–8
CHARGING SYSTEM [L3 WITH TC]
Inspection
A
B
A
x 100 (%) = DUTY (%)
B
Yes PCM input error.
No PCM, generator, or
both are not
normal.
Action
acxuuw00002021
acxuuw00002022