8-422
CHASSIS ELECTRICAL
-
Theft-alarm Svstem
3. HOOD SWITCH INPUT CIRCUIT
%iRBb
CONNECTOR
ECU
-
4
;8l
-
4. DOOR SWITCH INPUT CIRCUIT
euaE$
ml
STORAGE
CONNECTOR
ECU
Description of operation
When the hood is closed (the hood switch is switched OFF),
HIGH-level signals are sent to the ECU:
When the hood is opened (the hood switch is switched ON),
LOW-level signals are sent to the ECU.
ECU terminal voltage (Connection condition of the ECU
connector).
*
Measurement is not possible by using a voltmeter, but is
possible by using an oscilloscope.
Description of operation
When the door is closed (the door switch is switched OFF),
HIGH-level signals are sent to the ECU:
When the door is opened (the door switch is switched ON),
LOW-level signals are sent to the ECU.
ECU terminal voltage (Connection condition of the ECU)
ECU
Signal
Condition
Terminal
terminal
No.
voltage
IO
DrF;tlrr
Driver
Open
ov
door
Closed
5V”
Passenger
door
switch
PasdSo:?er
Open
ov
Closed
5V”
*
Measurement is not possible by using a voltmeter, but is
possible by using an oscilloscope.
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