Diagnosis - Pioneer DEH-2200UB Service Manual

5

5. DIAGNOSIS

QQ
3 7 63 1515 0
5.1 OPERATIONAL FLOWCHART
Power ON
VDD = 3.3 V
BSENS
ASENS
communication
with Grille
microcomputer.
SWVDD <- H
TE
L 13942296513
Source keys
operative
Source ON
SYSPW <- H
Completes power-on operation.
(After that, proceed to each source operation)
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.
5
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Pin 8
Pin 36
BSENS = L
Pin 35
ASENS = L
Starts
Pin 1
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.
Pin 15
x ao
y
i
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6
8
300 ms
300 ms
Q Q
3 6 7 1 3
u163
.
DEH-2200UB/XSEW5
6
7
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
7
8
9 9
A
B
C
2 8 9 9
D
E
F
21
8