VOLTAGE CONVERTER SYSTEM DC / DC Converter Malfunction

WIRING DIAGRAM

A01CJDLE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (VOLTAGE CONVERTER SUB-ASSEMBLY - BODY GROUND)


    1. A01CINUE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Voltage Converter Sub-assembly)

      Disconnect the V11 voltage converter sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V11-3 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (VOLTAGE CONVERTER SUB-ASSEMBLY - BATTERY)


    1. A01CINUE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Voltage Converter Sub-assembly)

      Disconnect the V11 voltage converter sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      V11-1 (+24V) - Body ground Always 20 to 28 V
      V11-4 (IGCT) - Body ground Ignition switch ON 20 to 28 V
      Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK VOLTAGE CONVERTER SUB-ASSEMBLY (OUTPUT VOLTAGE)


    1. A01CJ48E08
      Text in Illustration
      *a

      Component with harness connected

      (Voltage Converter Sub-assembly)

      Disconnect the ENG(12V), SRS-IG(12V) and IGN(12V) fuses from driver side junction block assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      V11-2 (+12V) - Body ground Always 11 to 14 V (When 18 to 32 V is applied to terminal 1)

    NG

    REPLACE VOLTAGE CONVERTER SUB-ASSEMBLY Click here

    OK

  4. CHECK VOLTAGE CONVERTER SUB-ASSEMBLY (OUTPUT VOLTAGE FOR BACK-UP)


    1. A01CJ48E07
      Text in Illustration
      *a

      Component with harness connected

      (Voltage Converter Sub-assembly)

      Disconnect the ECU-B(12V) fuse from driver side junction block assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      V11-7 (+B) - Body ground Always 8 to 14 V (When 18 to 32 V is applied to terminal 1)

    NG

    REPLACE VOLTAGE CONVERTER SUB-ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR