Diagnosis; Operational Flowchart - Pioneer DEH-P3000IB/XS/UC Service Manual

1

5. DIAGNOSIS

5.1 OPERATIONAL FLOWCHART

A
Power ON
Vcc = 5 V
Pin 16
BSENS
Pin 18
B
ASENS
Pin 75
DSENS
Pin 11
C
ASENBO <- H
Pin 40
Starts
communication
with Grille
microcomputer.
D
SWVDD <- H
Pin 49
Source keys
operative
Source ON
E
SYSPW <- H
Pin 48
Completes power-on operation.
(After that, proceed to each source
operation)
F
18
1
2
BSENS = L
ASENS = L
DSENS = L
300 ms
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-P3000IB/XS/UC
2
3
3
4
4