Diagnosis; Operational Flow Chart - Pioneer DEH-2050MPA Service Manual

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5. DIAGNOSIS

5.1 OPERATIONAL FLOW CHART

A
Power ON
VDD
Pin 8
B
bsens
Pin 36
bsens = L
asens
Pin 35
asens = L
C
SWVDD
Pin 1
Source keys
operative
D
Source ON
SYSPW H
Pin 15
E
Completes power-on operation.(After that, proceed to each source operation.)
F
16
1
2
Starts communication with Grille microcomputer.
300 ms
H
300 ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator
may be defective.
DEH-2050MPA/XN/EC
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3
3
4
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