THEFT-ALARM SYSTEM
Troubleshooting
3. HOOD SWITCH INPUT CIRCUIT
Sub fusible link
JIB
or storage
connector
Hood
switch
Ignition Off Draw
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
by using an oscilloscope.
Checking the hood switch circuit (Disconnect the connector of
the ECU and check at the wiring harness side)
Checking individual part:
Hood switch Refer to GROUP
TSB Revision