Page 5425 of 6020
ELECTRICAL-BODY AND CHASSIS 8A-487
Checkpoint Trouble Cause Countermeasure
OK
Repair open circuit or
connector contact between 1
L7 and C2
Open circuit or poor connector
contact
NG
Continued from the previous page
Continuity between 1
L7
and
C2
Repair heat wire
Continuity between rear
defogger terminals
Broken heat wire of rear
defogger
NG
OK
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Page 5426 of 6020
8A-488 ELECTRICAL-BODY AND CHASSIS
REMOVAL AND INSTALLATION
1
RTW 77ASH000201
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 (W ith HVAC control unit) (1) Refer to Section 1 “HVAC” HVAC control unit assembl
y
removal steps.
Installation
Follow the removal procedure in the reverse order to install the
rear defogger switch.
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Page 5427 of 6020

ELECTRICAL-BODY AND CHASSIS 8A-489
INSPECTION AND REPAIR
Switch side
B57
REAR DEFOGGER SWITCH
Rear Defogger Switch Connections
Terminal No.
SW position 9 7 8
ON
OFF
B7
RTW 78ASH002901
REAR DEFOGGER RELAY
Check continuity between the relay terminals.
2- 1........................ No continuity
(W hen 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.
• W hen 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 heat wire and the (-) terminal with a voltmeter.
(4) Check that the voltage becomes smaller from
A to B to C.
(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.
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Page 5428 of 6020
8A-490 ELECTRICAL-BODY AND CHASSIS
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.
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Page 5429 of 6020
ELECTRICAL-BODY AND CHASSIS 8A-491
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) -AIR BAG
PARTS LOCATION (RHD)
RTW 78AXF040301 & RTW 78AXF046501
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Page 5430 of 6020
8A-492 ELECTRICAL-BODY AND CHASSIS
PARTS LOCATION (LHD)
RTW 78AXF040401 & RTW 78AXF046601
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Page 5431 of 6020
ELECTRICAL-BODY AND CHASSIS 8A-493
CIRCUIT DIAGRAM C24SE
RTW 780XF014601
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Page 5432 of 6020
8A-494 ELECTRICAL-BODY AND CHASSIS
CIRCUIT DIAGRAM HFV6
RTW 78AXF013301
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