DYNAMIC RADAR CRUISE CONTROL SYSTEM ECU Power Source Circuit

DESCRIPTION


WIRING DIAGRAM

A003YE2E01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY (+B VOLTAGE)


    1. A003VNUE57
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Driving Support ECU assembly)

      Disconnect the driving support ECU assembly connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H5-30 (B) - Body ground Power switch on (IG) 11 to 14 V

    4. Reconnect the driving support ECU assembly connector.


    NG

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BODY GROUND)


    1. A003VNUE58
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Driving Support ECU assembly)

      Disconnect the driving support ECU assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H5-25 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the driving support ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BODY GROUND)

    OK

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

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      A003VMPE01

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      2E-1 - 2B-2 Always 10 kΩ or higher
      2E-1 - 2B-2 Battery voltage applied between terminals 2B-25 and 2B-6 Below 1 Ω
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      2F-1 - 2B-2 Always 10 kΩ or higher
      2F-1 - 2B-2 Battery voltage applied between terminals 2B-25 and 2B-6 Below 1 Ω
      Text in Illustration
      *1 Instrument Panel Junction Block Assembly - -

    3. Reinstall the instrument panel junction block assembly.


    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

  4. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - INSTRUMENT PANEL JUNCTION BLOCK)


    1. Disconnect the driving support ECU assembly connector.

    2. Disconnect the instrument panel junction block assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H5-30 (B) - 2B-2 Always Below 1 Ω

    4. Reconnect the instrument panel junction block assembly connector.

    5. Reconnect the driving support ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - INSTRUMENT PANEL JUNCTION BLOCK)

    OK

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK POWER SOURCE CIRCUIT)


    1. Disconnect the instrument panel junction block assembly connector.

      A003WIOE01

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

      Standard Voltage (for LHD)
      Tester Connection Switch Condition Specified Condition
      2E-1 - Body ground Always 11 to 14 V
      Standard Voltage (for RHD)
      Tester Connection Switch Condition Specified Condition
      2F-1 - Body ground Always 11 to 14 V
      Text in Illustration
      *1 Instrument Panel Junction Block Assembly - -

    3. Reconnect the instrument panel junction block assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY)

    OK

  6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)


    1. A003XIPE03
      Text in Illustration
      *1 Instrument Panel Junction Block Assembly

      Disconnect the instrument panel junction block assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      2B-6 - Body ground Always Below 1 Ω

    3. Reconnect the instrument panel junction block assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)

    OK

  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B ASSEMBLY)


    1. Disconnect the power management control ECU connector.

    2. Disconnect the instrument panel junction block assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      2B-25 - H4-2 (IG1D) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      2B-25 or H4-2 (IG1D) - Body ground Always 10 kΩ or higher

    4. Reconnect the power management control ECU connector.

    5. Reconnect the instrument panel junction block assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B ASSEMBLY)

    OK

    GO TO ENTRY AND START SYSTEM Click here