LIGHTING SYSTEM
Troubleshooting
54-87
3. DOOR SWITCH (ALL DOORS) INPUT CIRCUIT
ETACS
control unit
(electronic
control unit)
NOTE
Vehicles without
alarm system
door
(right)
Door
switch
Vehicles with theft-alarm
system
(left)
Description of operation
When, with the dome light illuminated (with the
ignition switch at the “ACC” or “OFF” position),
HIGH-level signals are sent to the electronic control
unit, the timer circuit is activated and the
light function of the dome light is started.
If there is an abnormal condition of the door switch
system, the dome light will not function normally
at the door-interlocked setting of its switch.
Electronic control unit terminal voltage (status of the electronic control unit connector)
I
E C U t e r m i n a l N o .
Signal
C o n d i t i o n s
Terminal voltage
Door switch signal
*Door is opened
o v
1
(door switch:
ON).
All doors are closed
(door switch: OFF).
Checking the door switch circuit
(Disconnect the electronic control unit connector and check the wiring harness side.)
Terminal
Connected
Measurement
Tester
Check conditions
Standard
to/measured
connection
component
Door switch
Resistance
All doors are closed
No
11
*Door is opened.
Continuity
NOTE
Vehicles without theft-alarm system
Vehicles with theft-alarm system
Individual part check
Door switch . . . Refer to GROUP
and Rear
Doors.
symbol, conduct the check for each individual
door, checking to be sure that only the door being
NOTE
checked is open.
When making the checks indicated by the
TSB Revision
I