DYNAMIC RADAR CRUISE CONTROL SYSTEM ECU Power Source Circuit

DESCRIPTION


WIRING DIAGRAM

A01J9O9E02

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK DRIVING SUPPORT ECU (B VOLTAGE)


    1. A01J93RE28
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Driving Support ECU)

      Disconnect the driving support ECU 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
      L60-30 (B) - Body ground Power switch on (IG) 11 to 14 V

    4. Reconnect the driving support ECU connector.


    NG

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


    1. A01J93RE29
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Driving Support ECU)

      Disconnect the driving support ECU connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      L60-25 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the driving support ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - 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.

      A01JAIIE03

    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-16 Always 10 kΩ or higher
      2E-1 - 2B-16 Battery voltage applied between terminals 2B-25 and 2B-6 Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      2F-1 - 2B-16 Always 10 kΩ or higher
      2F-1 - 2B-16 When battery voltage applied to terminals 2B-25 and 2B-6 Below 1 Ω
      Text in Illustration
      *1 Instrument Panel Junction Block Assembly *2 for LHD
      *3 for RHD - -

    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. A01JCRQE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Driving Support ECU)
      *2 Instrument Panel Junction Block

      Disconnect the driving support 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
      Tester Connection Condition Specified Condition
      L60-30 (B) - 2B-16 Always Below 1 Ω

    4. Reconnect the instrument panel junction block assembly connector.

    5. Reconnect the driving support ECU 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.

      A01J8U0E03

    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
      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 *2 for LHD
      *3 for RHD - -

    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. A01J968E03
      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
      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.

      A01JCT9E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      		 *2 Instrument Panel Junction Block Assembly

    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 - L6-2 (IG1D) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      2B-25 or L6-2 (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