AIR CONDITIONING SYSTEM Cooling Box Circuit

DTC Code DTC Name
Cooling Box Circuit

DESCRIPTION

When the cooler control switch sub-assembly is pushed, the 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

E202089E07

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. E200628C01

      *a

      Front view of wire harness connector

      (to Cooling Box Assembly)

      Disconnect the T4 cooling box connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      T4-3 (ILL+) - Body ground

      Headlight dimmer switch off

      Below 1 V

      T4-3 (ILL+) - Body ground

      Headlight dimmer switch on

      11 to 14 V

      T4-2 (B) - Body ground

      Engine switch off

      Below 1 V

      T4-2 (B) - Body ground

      Engine switch on (IG)

      11 to 14 V

      T4-8 (+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

      T4-9 (L) - Body ground

      Always

      Below 1 Ω

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Disconnect the G13 and G12 amplifier connectors.

    2. Disconnect the T4 cooling box connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G13-15 (COOL) - T4-4 (COL1)

      Always

      Below 1 Ω

      G12-12 (SWCB) - T4-5 (ACT)

      Always

      Below 1 Ω

      G13-15 (COOL) - Body ground

      Always

      10 kΩ or higher

      G12-12 (SWCB) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY

    1. E158415

      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

    Result

    Result

    OK

    NG
    NG

    REPLACE COOLER CONTROL SWITCH SUB-ASSEMBLY

    Click here

    OK

  4. INSPECT BLOWER MOTOR SUB-ASSEMBLY

    1. E195920

      Remove the blower motor sub-assembly

      Click here

    2. Apply battery voltage to the blower motor sub-assembly and check that the blower motor sub-assembly operates smoothly.

      OK

      Measurement Condition

      Specified Condition

      Battery positive (+) → Terminal 1

      Battery negative (-) → Terminal 2

      Blower motor sub-assembly operates smoothly

    Result

    Result

    OK

    NG
    NG

    REPLACE 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

      E252329C01

      *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 Blower Motor Sub-assembly)

      *e

      Front view of wire harness connector

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

      -

      -

    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

    Result

    Result

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPLACE NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY

    Click here