AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) Cooling Box Circuit

DESCRIPTION

When the cooler control switch sub-assembly is pushed, the No. 1 cooler blower motor sub-assembly and cooler magnet valve assembly controlled by the air conditioning amplifier assembly and air conditioning amplifier assembly (for the cooling box) operate. If the cooling box assembly does not operate when the cooler control switch sub-assembly is pushed, there may be a problem in the circuit shown below.

WIRING DIAGRAM

B001EYHE10

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (COOLING BOX - BATTERY AND BODY GROUND)


    1. B001F38E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Cooling Box Assembly)

      Disconnect the T6 cooling box connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      T6-3 (ILL+) - Body ground Headlight dimmer switch off Below 1 V
      T6-3 (ILL+) - Body ground Headlight dimmer switch on 11 to 14 V
      T6-2 (B) - Body ground Ignition switch off Below 1 V
      T6-2 (B) - Body ground Ignition switch ON 11 to 14 V
      T6-8 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T6-9 (L) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - COOLING BOX)


    1. Disconnect the G25 and G24 amplifier connectors.

    2. Disconnect the T6 cooling box connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G25-15 (COOL) - T6-4 (COL1) Always Below 1 Ω
      G24-12 (SWCB) - T6-5 (ACT) Always Below 1 Ω
      G25-15 (COOL) - Body ground Always 10 kΩ or higher
      G24-12 (SWCB) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY


    1. B001CW4

      Remove the cooler control switch sub-assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Cooler control switch sub-assembly on Below 1 Ω
      1 - 2 Cooler control switch sub-assembly off 10 kΩ or higher

    3. Apply battery voltage to the cooler control switch sub-assembly connector and check that the cooler control switch sub-assembly illuminates.

      OK
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 3

      Battery negative (-) → Terminal 4

      		 LED illuminates

      Battery positive (+) → Terminal 5

      Battery negative (-) → Terminal 6

      		 LED illuminates

    NG

    REPLACE COOLER CONTROL SWITCH SUB-ASSEMBLY Click here

    OK

  4. INSPECT NO. 1 COOLER BLOWER MOTOR SUB-ASSEMBLY


    1. B001FZ0

      Remove the No. 1 cooler blower motor sub-assembly Click here.

    2. Apply battery voltage to the No. 1 cooler blower motor sub-assembly and check that the No. 1 cooler blower motor sub-assembly operates smoothly.

      OK
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 1

      Battery negative (-) → Terminal 2

      		 No. 1 cooler blower motor sub-assembly operates smoothly

    NG

    REPLACE NO. 1 COOLER BLOWER MOTOR SUB-ASSEMBLY Click here

    OK

  5. INSPECT NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY


    1. Remove the No. 1 cooler wiring harness sub-assembly Click here.

      B001FDLE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-3 (ILL+) - B-5 Always Below 1 Ω
      A-2 (B) - E-2 (IG) Always Below 1 Ω
      A-8 (+B) - E-1 (+B) Always Below 1 Ω
      A-4 (COL1) - E-8 (CBT) Always Below 1 Ω
      A-5 (ACT) - E-6 (CBI) Always Below 1 Ω
      A-9 (L) - E-4 (GND) Always Below 1 Ω
      A-9 (L) - B-6 Always Below 1 Ω
      A-2 (B) - B-3 Always Below 1 Ω
      B-4 - E-7 (LED) Always Below 1 Ω
      B-2 - E-10 (SG) Always Below 1 Ω
      B-1 - E-5 (SW) Always Below 1 Ω
      A-2 (B) - C-1 Always Below 1 Ω
      C-2 - D-2 Always Below 1 Ω
      A-2 (B) - D-1 Always Below 1 Ω
      D-2 - E-9 (BLW) Always Below 1 Ω
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Vehicle Harness)
      *b

      Front view of wire harness connector

      (to Cooler Control Switch Sub-assembly)
      *c

      Front view of wire harness connector

      (to Cooler Magnet Valve Assembly)
      *d

      Front view of wire harness connector

      (to No. 1 Cooler Blower Motor Sub-assembly)
      *e

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly [for Cooling Box])

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPLACE NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY Click here