Defoggers.pdf

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2002 ACCESSORIES & EQUIPMENT
Defogger System - RAV4
BODY ELECTRICAL SYSTEM
PRECAUTION
NOTE:
Take care to observe the following precautions when performing inspections or
removal and replacement of body electrical related parts.
1.
Headlight System
Halogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or
dropped. Hold a bulb only by its plastic or metal case.
Don't touch the glass part of a bulb with bare hands.
2.
SRS (Supplemental Restraint System)
The RAV4 is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front
passenger airbag. Failure to carry out service operation in the correct sequence could cause the SRS to
unexpectedly deploy during servicing, possibly leading to a serious accident. Before servicing (including
removal or installation of parts, inspection or replacement), be sure to read the precautionary notices in
AIR BAG SAFETY PRECAUTIONS
.
3.
Audio System
If the negative (-) terminal cable is disconnected from the battery, the preset AM, FM1 and FM2 stations
stored in memory are erased, so be sure to note the stations and reset them after the battery terminal is
reconnected.
4.
Mobile Communication System
If the vehicle is equipped with a mobile communication system, refer to precautions in
IF VEHICLE IS
EQUIPPED WITH MOBILE COMMUNICATION SYSTEM
.
TROUBLESHOOTING
PROBLEM SYMPTOMS
DEFOGGER SYSTEM
Symptom/Suspected Area
Entire Defogger System Does Not Operate
HTR Fuse
See
FUSES & CIRCUIT BREAKERS
DEF Fuse
Defogger Relay
Defogger Switch
Wire Harness
Rear Window Defogger Does Not Operate
Defogger Wire
Wire Harness
FUSES & CIRCUIT BREAKERS
INSPECTION
INSPECTION
.....
INSPECTION
.....
DEFOGGER SYSTEM
LOCATION
Fig. 1: Locating Defogger System Components
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION
1.
Inspect defogger timer operation
.
a. Connect the positive (+) lead from the battery to terminals 1, 7 and negative (-) lead to terminal 9.
b. Connect the positive (+) lead from the battery to terminal 4 through a 1.4 W test bulb.
c. Push the defogger switch ON, and check that the test bulb and indicator light up for 12 to 18
minutes, then the indicator light go out.
Fig. 2: Inspecting Defogger Timer Operation
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If operation is not as specified, replace the inner printed circuit board.
2.
Inspect rear defogger relay continuity
.
Fig. 3: Inspecting Rear Defogger Relay Continuity
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 4: Displaying Defogger Relay Continuity Specifications
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If continuity is not as specified, replace the relay.
3.
W/ mirror heater: Inspect mirror heater operation
.

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