Air Conditioning Panel (For Manual Air Conditioning System) Inspection

Vehicle Interior. Corolla. Zre142 Aze141
Heating Air Conditioning. Corolla. Zre142 Aze141

  1. INSPECT NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH)

  2. INSPECT NO. 2 HEATER CONTROL (BLOWER SWITCH)

  3. INSPECT NO. 3 HEATER CONTROL

Air Conditioning Panel (For Manual Air Conditioning System) -- Inspection



1. INSPECT NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH)


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning Panel (For Manual Air Conditioning System) Inspection

  1. Disconnect the connector from the No. 1 heater control (air inlet control switch).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    3 (FRS) - 4 (REC)
    		Air inlet control switch: FREE
    		Below 1 Ω
    3 (FRS) - 4 (REC)
    		Air inlet control switch: LOCK
    		10 kΩ or higher
    1 (F/D) - 8 (ACID)
    		Mode control dial: except Foot/DEF position and DEF position
    		10 kΩ or higher
    1 (F/D) - 8 (ACID)
    		Mode control dial: Foot/DEF position or DEF position
    		Below 1 Ω

  1. Check that the indicator light comes on.

    1. Turn the No. 1 heater control (air inlet control switch) to LOCK.

    2. Connect a positive (+) lead from the battery to terminal 2 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.

      OK:
      The indicator light comes on.

  1. Check that the illumination comes on.

    1. Connect a positive (+) lead from the battery to terminal 7 and negative (-) to terminal 6, and check that the illumination comes on.

      OK:
      The illumination comes on.
      If the result is not as specified, replace the No. 1 heater control (air inlet control switch).


2. INSPECT NO. 2 HEATER CONTROL (BLOWER SWITCH)


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning Panel (For Manual Air Conditioning System) Inspection

  1. Disconnect the connector from the No. 2 heater control (blower switch).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    4 (LO), 6 (HI), 9 (M1), 10 (M2) - 5 (E)
    		Blower switch: OFF
    		10 kΩ or higher
    4 (LO) - 5 (E)
    		Blower switch: LO
    		Below 1 Ω
    4 (LO), 9 (M1) - 5 (E)
    		Blower switch: M1
    		Below 1 Ω
    4 (LO), 10 (M2) - 5 (E)
    		Blower switch: M2
    		Below 1 Ω
    4 (LO), 6 (HI) - 5 (E)
    		Blower switch: HI
    		Below 1 Ω
    If the resistance is not as specified, replace the No. 2 heater control (blower switch).


3. INSPECT NO. 3 HEATER CONTROL


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning Panel (For Manual Air Conditioning System) Inspection

  1. Disconnect the connector from the No. 3 heater control.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    2 (B) - 3 (A/C)
    		A/C switch: LOCK
    		Below 1 Ω
    2 (B) - 3 (A/C)
    		A/C switch: FREE
    		10 kΩ or higher
    7 (B) - 8 (E)*1
    		Air mix control dial: MAX HOT position
    		Below 1 Ω
    7 (B) - 8 (E)*1
    		Air mix control dial: except MAX HOT position
    		10 kΩ or higher
    HINT:
    *1: w/ PTC heater

  1. Check that the indicator light comes on.

    1. Connect a positive (+) lead from the battery to terminal 3 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.

      OK:
      The indicator light comes on.

  1. Check that the illumination comes on.

    1. Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 6, and check that the illumination comes on.

      OK:
      The illumination comes on.
      If the result is not as specified, replace the No. 3 heater control.