MVH-280FD/XNEW5
8
1
2
3
4
1
2
3
4
C
D
F
A
B
E
5. DIAGNOSIS
5.1 OPERATIONAL FLOWCHART
Vcc = 1.2 V
PVcc = 3.3 V
BSENS
Pin 90
ASENS
Pin 89
DSENS
Pin 34
BSENS = L
DSENS = L
Starts
communication
with Grille
microcomputer.
VOUT5 <- H
Pin 1(IC201)
Source keys
operative
Source ON
SYSPW <- H
Pin 2
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.
Completes power-on operation.
(After that, proceed to each source operation)
Power ON
ASENS = L
Vcc : Pin 12, 20, 43, 78, 86, 109
PVcc : Pin 3, 16, 28, 36, 48, 69, 82,101, 112