Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di theft headligh
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DI-425
DIAGNOSTICS - THEFT DETERRENT SYSTEM
DI020-15
Headlight Control Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch ON and OFF at approxi-
mately 0.4 sec. intervals. This switches the headlight control relay ON and OFF, thus flashing the headlights
(See the wiring diagram below).
In this condition, if any of the following operations is done, the Tr in the ECU goes OFF and the headlight
control relay switches OFF, thus stopping the headlights flashing:
(1) Unlock the front LH or RH door with a key.
(2) Turn the ignition switch to IG or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
WIRING DIAGRAM
Engine Room J/B
H-LP RH 9
B-L B Headlight Theft Deterrent ECU
1 1 ID2
1 2 Relay
10
B 1 2 R
T6 HEAD
E E
R-L R-L 3 5
J7 J6
8
W-B
EL HL HU ED
C21 A
FLASH
Dimmer Switch J5
LOW
J/C
HIGH Instrument Panel J/B
11 6 2
W-B W-B
1M 1O
FL Block
Battery
MAIN
2
ID
I13715
2002 ECHO (RM884U)
Author : Date : 595
DI-426
DIAGNOSTICS - THEFT DETERRENT SYSTEM
INSPECTION PROCEDURE
HINT:
The flow chart below is based on the premise that the headlights light up normally whenever the light control
switch is operated. If headlight operation is not normal when the light control switch is operated, proceed
to troubleshooting on page BE-2 .
1 Check voltage between terminal HEAD of theft deterrent ECU connector and
body ground.
PREPARATION:
LOCK (a) Remove the glove compartment door.
(b) Disconnect the theft deterrent ECU connector.
Disconnect CHECK:
Measure voltage between terminal HEAD of theft deterrent
ECU connector and body ground.
OK:
(+) (-)
Voltage: 10 - 14 V
HEAD I02921
NG Check and repair harness and connector be-
tween theft deterrent ECU and headlight control
relay (See page IN-29 ).
OK
Check and replace theft deterrent ECU.
2002 ECHO (RM884U)
Author : Date : 596
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