AIR CONDITIONING SYSTEM Cooling Box Control Switch Circuit

DESCRIPTION

The cooler control switch sub-assembly is the activation switch for the cool box. If the cool box does not activate when the cooler control switch sub-assembly is pushed, there may be a malfunction in the circuit shown below.

WIRING DIAGRAM

A01ERV3E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (PANEL, A/C IG, ECU-B1)


    1. Remove the PANEL and A/C IG fuses from the cowl side junction block LH.

    2. Remove the ECU-B1 fuse from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      PANEL fuse Always Below 1 Ω
      ECU-B1 fuse Always Below 1 Ω
      A/C IG fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 COOLER WIRING HARNESS - BATTERY)


    1. A01ENNIE13

      Disconnect the No. 1 cooler wiring harness sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4 (+B) - Body ground Always 11 to 14 V
      3 - Body ground Always 11 to 14 V
      1 (B) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 COOLER WIRING HARNESS - BODY GROUND)


    1. A01ENNIE11

      Disconnect the No. 1 cooler wiring harness sub-assembly connector.

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

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY (OPERATION)


    1. Replace the No. 1 cooler wiring harness sub-assembly with a normal one and check that the condition returns to normal.

      OK
      Same problem does not occur.

    NG

    INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY Click here

    OK

    REPLACE NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY

  5. INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY


    1. A01EN76E01

      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 On Below 1 Ω
      1 - 2 Off 10 kΩ or higher

    3. Apply battery voltage to the cooler control switch connector and check that the cooler control switch 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

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (for Cool Box) Click here