Component Tests and General Diagnostics

1. INSPECT AIR CONDITIONING CONTROL ASSEMBLY







a. Inspect operation of the defogger switch indicator.
If the result is not as specified, replace the air conditioning control assembly.







b. Inspect the defogger switch continuity.
If the result is not as specified, replace the air conditioning control assembly.

2. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (W/ OUTER MIRROR HEATER)







a. Inspect operation of the mirror defogger operation.
If the result is not as specified, replace the mirror assembly.

3. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH (W/ OUTER MIRROR HEATER)







a. Inspect operation of the mirror defogger operation.
If the result is not as specified, replace the mirror assembly.


4. INSPECT BACK WINDOW (DEFOGGER WIRE)





NOTE:
- When cleaning the glass, using a soft and dry cloth wipe the glass along of the wire. Take care not to damage the wires.
- Do not use detergents or glass cleaners including abrasive ingredients.
- When measuring voltage, wrap a piece of tin foil around the tip of the negative probe and press the foil against the wire with your finger, as shown in the illustration.




a. Turn the ignition switch ON.
b. Turn the defogger switch ON.







c. Inspect the voltage at the center of each heat wire as shown in the illustration.

HINT: If there is approximately 10 V, the wire maybe broken between the center of the wire and the positive (+) end. If there is no voltage, the wire maybe broken between the center of the wire and ground.

d. Place the voltmeter positive (+) lead against the defogger wire on the battery side.
e. Place the voltmeter negative (-) lead with the foil strip against the wire on the ground side.
f. Slide the positive (+) lead from battery to ground side.
g. The point where the voltmeter deflects from several V to 0 V is the place where the defogger wire is broken.

HINT: If the defogger wire is not broken, the voltmeter indicates 0 V at the positive (+) end of the defogger wire but gradually increases to about 12 V as the meter probe moves to the other end.




h. If necessary, repair the defogger wire.
1. Clean the broken wire tips with grease, wax and silicone remover.
2. Place the masking tape along the both sides of the wire.
3. Thoroughly mix the repair agent (DuPont paste No 4817).




4. Using a fine tip brush, apply a small amount of the agent to the wire.
5. After a few minutes, remove the masking tape.

NOTE: Do not repair the defogger wire for at least 24 hours.

5. INSPECT DEFOGGER RELAY (Marking: DEF)







a. Inspect the continuity.
If the result is not as specified, replace the relay.