Page 1009 of 4264
ELECTRICAL-BODY AND CHASSIS 8A-351
CIRCUIT DIAGRAM (RHD)
RTW48AXF029901
Page 1010 of 4264
8A-352 ELECTRICAL-BODY AND CHASSIS
CIRCUIT DIAGRAM (LHD)
RTW48AXF010701
Page 1011 of 4264
ELECTRICAL-BODY AND CHASSIS 8A-353
TROUBLE SHOOTING
Rear defogger inoperative
Checkpoint Trouble Cause Countermeasure
Reinstall or replace the fuse
No. C-7 (15A) and 9
B-56
Poor fuse contact or blown
NG
Reinstall or replace the fuse
SBF-10 (20A)
SBF-10 (20A, Fuse box)
Poor fuse contact or blown
Replace the rear defogger
switch
Rear defogger switch function
Switch malfunction
NG NG OK
OK OK
Fuse No. C-7 (15A, Fuse box)
and 9
B-56
Replace the rear defogger
relay
Relay malfunction
NG
Continued on the next page
Rear defogger relay function
Repair grounding point
D-2
contact
Grounding point
C-2
Poor grounding point contact
NG OK
Repair open circuit or poor
connector contact between
fuse No. C-7 (15A) and 3
B-7, SBF-10 (20A) and 1
B-7, 2 B-7 (3 B-55) and
1
L-4, 4 B-7 (3 B-54)
and 3
B-46 or 1 B-46 and
C-2
Voltage between 1 L-4-
ground when the starter switch
and the rear defogger switch
are at on position (should be
battery voltage present)
Open circuit or poor connector
contact
NG OK
Page 1012 of 4264
8A-354 ELECTRICAL-BODY AND CHASSIS
Checkpoint Trouble Cause Countermeasure
OK
Repair open circuit or
connector contact between 1
L-7 and C-2
Open circuit or poor connector
contact
NG
Continued from the previous page
Continuity between 1
L-7
and
C-2
Repair heat wire
Continuity between rear
defogger terminals
Broken heat wire of rear
defogger
NG OK
Page 1013 of 4264
ELECTRICAL-BODY AND CHASSIS 8A-355
REMOVAL AND INSTALLATION
865R300008
REAR DEFOGGER SWITCH
Removal
1. Instrument Panel Cluster Assembly
Refer to Section 10 “BODY” for center cluster panel
assembly removal steps.
2. Rear Defogger Switch (With HVAC control unit)
Refer to Section 1 “HVAC” HVAC control unit assembly
removal steps.
Installation
Follow the removal procedure in the reverse order to install the
rear defogger switch.
Page 1014 of 4264
8A-356 ELECTRICAL-BODY AND CHASSIS
INSPECTION AND REPAIR
Switch side
B-57
REAR DEFOGGER SWITCH
Rear Defogger Switch Connections
Terminal No.
SW position 9 7 8
ON
OFF
B-7
REAR DEFOGGER RELAY
Check continuity between the relay terminals.
2- 1......................... No continuity
(When battery voltage is applied between
4 and 3)
2- 1......................... Continuity
INSPECTION OF REAR DEFOGGER HEAT
WIRE
Heat wires are printed on the inner side of glass.
To clean, use a soft cloth and wipe horizontally along the
wires.
Never use glass cleaner or equivalent.
When measuring voltage, wind a piece of tin foil around the
tip of the negative probe and press the foil against the wire
with your finger as shown.
(1) Turn the ignition switch on.
(2) Turn the defogger switch on.
(3) Measure the voltage between the three points on the hea
t
wire and the (-) terminal with a voltmeter.
(4) Check that the voltage becomes smaller from
A to B to C.
Page 1015 of 4264
ELECTRICAL-BODY AND CHASSIS 8A-357
(5) If there is a place where the voltage suddenly changes to
0V, there is a broken wire between there and the powe
r
side.
(6) Move the tester probe from the position where the voltage
changes to 0V toward the power side and find where the
voltage suddenly increases.
REPAIR OF BROKEN HEAT WIRE
(1) Clean broken wire tips with white gasoline.
(2) Place masking tape along both sides of wire to be repaired.
(3) Thoroughly mix the repair agent (Dupont paste No. 4817 or
equivalent).
(4) Using a fine tip brush, apply a small amount to the wire.
(5) After a couple of minutes, remove the masking tape.
(6) Allow to stand at least 24 hours.
Page 1016 of 4264
8A-358 ELECTRICAL-BODY AND CHASSIS
SRS-AIR BAG
PARTS LOCATION (RHD)
RTW48AXF021201 & RTW48AXF021301
