Diagnosis; Operational Flowchart - Pioneer DEX-P99RS/UC Service Manual

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5. DIAGNOSIS

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5.1 OPERATIONAL FLOWCHART

A
Power ON
Vcc = 3.3 V
Pin 23
BSENS
Pin 104
B
ASENS
Pin 103
DSENS
Pin 137
C
ASENBO <- H
Pin 68
TE
L 13942296513
Starts
communication
with Grille
microcomputer.
D
SWVDD <- H
Pin 53
Source keys
operative
Source ON
E
SYSPW <- H
Pin 99
www
Completes power-on operation.
(After that, proceed to each source operation)
F
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BSENS = L
ASENS = L
0.85 V < DSENS < 2.45 V
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 500 msec, the oscillator
may be defective.
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DEX-P99RS/UC
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500 mS 300 mS
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