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DI-439
DIAGNOSTICS - THEFT DETERRENT SYSTEM
DI029-15
Door Unlock Detection Switch Circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions from this circuit. It is used as one of the operating conditions for the key confine-
ment prevention function.
WIRING DIAGRAM
J8 Theft Deterrent
L-R (*1) J/C ECU
11 14
L-B (*2) L-R A A L-B
IA1 T5 LSWD
11 15
L-R L-B
IF1 T5 LSWP
J4 J/C GR GR
7 4 16
A A (*3) (*3)
T5
BA2 IB1 LSWR
GR GR
(*3) (*3) A GR
D17 (*2)
3 D18 (*2) (*3)
4 D15 (*1) 4 1
D16 (*1) D12
Door Unlock D11 7 BB2
Door Unlock Door Unlock
Detection Door Unlock
Detection Detection
Switch Detection Switch
Switch GR (*3) Switch
Front LH Rear LH
3 Front RH 2 Rear RH
4 3
W-B W-B W-B (*3) W-B (*3)
14 IA1 14 IF1 8 BA2 8 BB2
A W-B A W-B
W-B (*3)
J5 J9 W-B (*3)
J/C J/C
W-B
ID IF BG
*1: w/ Door Lock Control
*2: w/o Door Lock Control
*3: 4-Door
I22568
2002 ECHO (RM884U)
Author : Date : 609
DI-440
DIAGNOSTICS - THEFT DETERRENT SYSTEM
INSPECTION PROCEDURE
1 Check Door Unlock Detection Switch.
PREPARATION:
Disconnect (a) Remove the door trim and service hole cover.
(b) Disconnect the door unlock detection switch connector.
CHECK:
Check continuity between terminals 3 and 4 of door unlock
detection switch connector, when the door lock knob is oper-
ated to the lock side and unlock side.
OK:
I14917 Switch Condition Tester connection Specified condition
Door unlock 3-4 Continuity
Door lock - No continuity
NG Replace door unlock detection switch.
OK
2 Check harness and connectors between ECU and door unlock detection switch,
door unlock detection switch and body ground (See page IN-29 ).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI-412 ).
2002 ECHO (RM884U)
Author : Date : 610
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