Duty Ratio =
A + B
A
x 100 (%)
ON
OFF
A
B
1 cycle
Blower Level
0
Si duty (%)
LO
M1
M2
HI
30
43
67 100
I21113
B7
Blower Motor Liner Controller
A/C control assembly
B3
Blower Motor
A24
3
BLW
From
Heater Relay
B-Y
IJ
B-W
2
1
3
4
2
1
W-B
BR
BR
-
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI-765
919
Author:
Date:
2001 SIENNA (RM787U)
Blower Motor Circuit (Front A/C)
CIRCUIT DESCRIPTION
The blower motor is operated by signals from the A/C control
assembly. Blower motor speed signals are transmitted by
changes in the Duty Ratio.
Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non-continuity, then.
WIRING DIAGRAM
DI7SL-02
Содержание RM787U
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