THEFT-ALARM SYSTEM
Troubleshooting
5. DOOR SWITCH (LEFT-FRONT DOOR AND RIGHT-FRONT DOOR) INPUT CIRCUIT
Sub fusible link
JIB
Diode
ETACS
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
terminal No.
Signal
I
Condition
Terminal
voltage
Measurement is not possible by using a voltmeter, but is possible
by using an oscilloscope.
Checking the door switch circuit (Disconnect the connector of
the ECU and check at the wiring harness side)
Checking individual part:
Door switch
Refer to GROUP
Assembly.
<FRONT,
Door switch
TSB Revision