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5. DIAGNOSIS
5.1 OPERATIONAL FLOWCHART
A
Power ON
Vcc = 1.2 V
PVcc = 3.3 V
BSENS
Pin 90
B
BSENS = L
ASENS
Pin 89
ASENS = L
DSENS
C
Pin 34
DSENS = L
Starts
communication
with Grille
microcomputer.
D
SWVDD <- H
Pin 113
Source keys
operative
E
Source ON
SYSPW <- H
Pin 8
Completes power-on operation.
F
(After that, proceed to each source operation)
12
1
2
Vcc : Pin 12, 20, 43, 78, 86, 109
PVcc : Pin 3, 16, 28, 36, 48, 69, 82,101, 112
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.
MVH-350BT/XMEW5
2
3
3
4
4