Heater Control Assembly: Inspection

1. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 6 then check that the illuminations light up.
   Fig 1: Checking Illuminations Light Up

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2. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 8 then check that the passenger side seat belt illumination lights up.
   Fig 2: Checking Passenger Side Seat Belt Light Illumination

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If operation is not as specified, check the faulty bulb.

Using an ohmmeter, apply the tester as shown in Fig 3 to test for continuity.

If continuity exists, replace the heater control.

If no continuity exists, replace the bulb.

Fig 3: Testing Light Bulb For Continuity

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1. Connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 13.
2. Push the A/C button in and then check that the A/C indicator lights up.
Fig 4: Inspecting A/C Switch Indicator Operation
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If operation is not as specified, replace the A/C switch.

1. Connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 13 while pressing the switch.
2. Connect the positive (+) lead from battery to terminal 4 and then check that the A/C indicator dims.
Fig 5: Inspecting A/C Switch Indicator Dimming Operation
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If operation is not as specified, replace the A/C switch.

Fig 6: Displaying A/C Switch Control

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Fig 7: Inspecting A/C Switch Continuity

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Switch continuity: If continuity is not as specified, replace the A/C switch.

Illumination circuit: If continuity is not as specified, replace the bulb.

1. Connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 12.
2. Push the air inlet control switch in and then check that the air inlet control switch lights up.
Fig 8: Inspect Air Inlet Control Switch Indicator
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If operation is not as specified, replace the air inlet control switch.

1. Connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 12 while pressing the switch.
2. Connect the positive (+) lead from battery to terminal No. 4 and then check that the air inlet control switch indicator dims.

If operation is not as specified, replace the air inlet control switch.

Fig 9: Inspecting Air Inlet Control Switch Indicator Dimming Operation

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Fig 10: Displaying Air Inlet Control Switch

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Fig 11: Displaying Air Inlet Control Switch Continuity

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If continuity is not as specified, replace the air inlet control switch.

1. Connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 12.
   Fig 12: Inspecting Air Inlet Control Switch Indicator Operation

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2. Push the air inlet control switch in and then check that the air inlet control switch lights up.
3. Turn the defroster damper control dial to the "DEF - FOOT" position and check that the air inlet control switch indicator lights off.

If operation is not as specified, replace the air inlet control switch.

Fig 13: Displaying Blower Speed Control Switch

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Fig 14: Inspecting Blower Speed Control Switch Continuity

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If continuity is not as specified, replace the switch.