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05–1729
DIAGNOSTICS
–
LIGHTING SYSTEM
05CS4–04
DOOR COURTESY SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU detects the condition of the door courtesy switch assy.
WIRING DIAGRAM
Body ECU
Driver Side J/B
21
1D
24
V
DCTY.
26
3
5
BR
BR
BR
IM1
ID2
1D
PCTY.
20
4
4
ID2
20
R
R
R
IM1
1D
RCTY.
22
5
R
1D
1
1
1
1
D7
Door Courtesy
SW Front LH
D8
Door Courtesy
SW Front RH
D10
Door Courtesy
SW Rear RH
D9
Door Courtesy
SW Rear LH
I39991
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
1893
751527091.025.png
05–1730
DIAGNOSTICS
–
LIGHTING SYSTEM
INSPECTION PROCEDURE
HINT:
Each door courtesy switch circuit is same procedure. First, inspect the suspected door courtesy switch cir-
cuit.
1
READ VALUE OF HAND–HELD TESTER
(a) Connect the hand–held tester to the DLC3.
(b) Push the power switch ON (IG) and turn the hand–held tester main switch on.
(c) Select the items below in the DATA LIST, and read the displays on the hand–held tester.
B No.1/GW (Multiplex Network Body ECU):
Measurement Item/
Display (Range)
Diagnostic
Note
Item
Normal Condition
Driver’s door courtesy
SW signal/ON or OFF
ON: Driver’s door is open
OFF: Driver’s door is closed
D DOR CTY SW
–
Passenger’s door
courtesy SW signal/
ON or OFF
ON: Passenger’s door is open
OFF: Passenger’s door is closed
P DOR CTY SW
–
Rear door courtesy
SW signal/ON or OFF
ON: Either right or left door is open
OFF: Both the right and left doors are closed
Rr DOR CTY SW
–
NG
Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05–1677 )
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
1894
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05–1731
DIAGNOSTICS
–
LIGHTING SYSTEM
2
CHECK HARNESS AND CONNECTOR(COURTESY LAMP SWITCH – INSTRUMENT
PANEL JUNCTION BLOCK ASSY)
(a)
Disconnect the 1D connectors from the instrument panel junction block assy.
(b)
Measure the resistance according to the value(s) in the table below.
Standard:
Tester connection
Condition
Specified condition
Front passenger door is open
Front passenger door is closed
W
10 k W or higher
Below 1
1D–24 – Body ground
Front driver door is open
Front driver door is closed
Below 1
W
1D–21 – Body ground
10 k
or higher
W
Rear RH door is open
Rear RH door is closed
Below 1 W
10 k W or higher
1D–20 – Body ground
Rear LH door is open
Rear LH door is closed
W
10 k W or higher
Below 1
1D–5 – Body ground
Instrument Panel Junction Block
Connector Front View:
RCTY
1D
PCTY
DCTY
I39972
NG
Go to step 3
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05–1677 )
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
1895
751527091.008.png 751527091.009.png 751527091.010.png 751527091.011.png 751527091.012.png 751527091.013.png 751527091.014.png 751527091.015.png 751527091.016.png
 
05–1732
DIAGNOSTICS
–
LIGHTING SYSTEM
3
INSPECT COURTESY LAMP SWITCH
(a)
Remove the courtesy lamp switch.
ON
OFF
(b)
Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connection
Condition
Specified condition
OFF
(When shaft is pressed)
1 – Switch body
10 k
W
or higher
ON
(When shaft is not
pressed)
1 – Switch body
Below 1
W
E71371
NG
REPLACE COURTESY LAMP SWITCH
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF COURTESY SWITCH CIRCUIT)
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
1896
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