Window Defogger System: Inspection

1. Remove the steering wheel pad (See REPLACEMENT ).
2. Disconnect the connector as shown in Fig 1 .
   Fig 1: Inspecting Steering Wheel Pad Switch

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3. Measure the resistance of the switch.

Standard: 

If the result is not as specified, replace the switch assy.

Fig 2: Disconnecting Connector

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1. Apply battery voltage to the mirror terminals and check operation of the mirror heater.

   OK: 

If the result is not as specified, replace the mirror assy.

Fig 3: Inspecting Outer Rear View Mirror Assy LH

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1. Apply battery voltage to the mirror terminals and check operation of the mirror heater.

   OK: 

If the result is not as specified, replace the mirror assy.

Fig 4: Inspecting Outer Rear View Mirror Assy RH

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Fig 5: Inspecting Back Window (Defogger Wire)

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1. Turn the power switch ON (ACC).
2. Push the defogger switch ON.
3. Check the voltage at the center of each defogger wire, as shown in Fig 5 .

   Standard: 

   VOLTAGE CRITERIA
   
   

   Voltage	Criteria
   Approx. 5 V	Wire is not broken
   Approx. 10 or 0 V	Wire is broken

   Fig 6: Checking Voltage At Center Of Each Defogger Wire

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   HINT:

   If there is approximately 10 V, the wire may be faulty between the center of the wire and the wire end on the battery side. If there is no voltage, the wire may be faulty between the center of the wire and the wire end on the ground side.

4. Place the voltmeter's positive (+) lead against the defogger wire on the battery side.
5. Place the voltmeter's negative (-) lead with the foil strip against the wire on the ground side.
   Fig 7: Measuring Voltage

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6. Slide the positive (+) lead from the battery side to the ground side.
7. The point where the voltage changes from approximately 10 V to 0 V is where the defogger wire is broken.

   HINT:

   If the defogger wire is not broken, the voltmeter should indicate 0 V at the positive (+) end of the defogger wire and gradually increases to approximately 12 V as the meter probe moves to the other end.

   Fig 8: Placing Masking Tape Along Both Sides Of Wire

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8. If necessary, repair the defogger wire.
   1. Clean the broken wire tips with grease, wax and silicone remover.
   2. Place masking tape along both sides of the wire.
   3. Thoroughly mix the repair agent (DuPont paste No. 4817).
      Fig 9: Applying Small Amount Of Agent To Wire

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   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 again for at least 24 hours. 

Fig 10: Inspecting Mirror Heater Relay

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1. Remove the mirror heater relay.
2. Measure the resistance of the relay.

Standard: 

If the result is not as specified, replace the relay.

1. Remove the instrument panel sub-assy lower (See INSTRUMENT PANEL SUB-ASSY ).
2. Measure the voltage.

Standard: 

If the result is not as specified, replace the instrument panel J/B assy.

Fig 11: Inspecting DEF Relay

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