Light Auto Turn Off System
From Power Source System (See Page 66)
1 1 1
40A 15A 100A 7. 5A 7. 5A
HEAD DOME DC/DC ECU- IG ACC
MAIN
2 2 2
3 3B 3 1 3D
W
W
W
B Connector 1 1B
Junction
J6
3 3
B
1 5
T- LP Relay
H- LP
Relay
R
2 3
3 3
30 1A
B
(* 2)
G
6 19 5 21
ECUB TRLY SIG ACC
B 5(A), B 7(C)
J 7(A), J 8(B)
E A
Body ECU
Connector
(*1)
Junction
HRLY AUTO HEAD TAIL GND DCTY OBD2
E B 20 C 18 A 3 C 21 C 1 26 18
(* 2)
G
28 1E 17 1E 21 1D 3 1L
W- B
(* 1)
BR
LG
W
G
R
B
2 IJ3
3 4F 7 4F 14 4F 8 4F 14 4G 11 5H
G
8 4I 2 4B 1 4B 3 4B 9 4B 8 5M
(* 1)
Door Courtesy SW Front LH
W
G
G
R
Data Link Connector 3
1 7
SIL
19 20 18
* 1 : w/ Daytime Running Light OFF
D7
D1
* 2 : w/o Daytime Running Light
Control SW
Tail
Light
Head
W- B
AUTO
C11 12
Combination SW
IH
164
2005 PRIUS (EWD599U)
System Outline
”The light auto turn off system” automatically turns off the taillights or headlights when the driver’s side door is opened, which
prevents the lights from being left on.
If the power SW is pushed to OFF from IG ON with the headlights or taillights on, signal is input to the TERMINAL SIG of the
body ECU. If the driver’s side door is opened at that time, the signal from the door courtesy SW front LH is sent to the
TERMINAL DCTY of the body ECU. The signal turns off the headlights, front fog lights or taillights.
Service Hints
Body ECU
6-Ground : Always approx. 12 volts
5-Ground : Approx. 12 volts with the power SW at IG ON position
1-Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
B5 A 46 D1 47 J7 A 48
B7 C 46 D7 50 J8 B 48
C11 47 J6 48
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
3 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
1A
28 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
1B
1D 28 Floor Wire and Driver Side J/B (Lower Finish Panel)
1E 28
Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
1L 29
3B
23 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
3D
4B
4F
36 Instrument Panel Wire and Center Connector No.1
No 1 (Behind the Combination Meter)
4G
4I
5H
40 Instrument Panel Wire and Center Connector No.2
No 2 (Instrument Panel Brace RH)
5M
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IJ3 58 Engine Room Main Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code See Page Ground Points Location
IH 56 Cowl Side Panel LH
165
2005 PRIUS (EWD599U)
