CAN COMMUNICATION SYSTEM Power Source Control ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Power Management Control ECU Communication Stop Mode

  • "Power Management" not displayed on "Communication Bus Check" screen of intelligent tester

  • Applies to "Power Management Control ECU Communication Stop Mode" in "DTC combination table"

  • Power source circuit of power source control ECU

  • Power source control ECU branch wire or connector

  • Power source control ECU

Tech Tips

For 1ND-TV engine.

WIRING DIAGRAM

A0117F4E04

INSPECTION PROCEDURE

Note


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

  • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.

  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. CHECK FOR OPEN IN CAN BUS WIRE (POWER SOURCE CONTROL ECU BRANCH WIRE)


    1. Turn the ignition switch off.

    2. A011AITE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Source Control ECU)

      Disconnect the D73 power source control ECU connector.

    3. Measure the resistance according to the value in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      D73-14 (CA1H) - D73-13 (CA1L) Ignition switch off 54 to 69 Ω

    4. Reconnect the power source control ECU connector.


    NG

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)


    1. A011AITE06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Source Control ECU)

      Disconnect the D73 power source control ECU connector.

    2. Measure the resistance according to the value in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D73-6 (GND) - Body ground Always Below 1 Ω
      D73-5 (GND2) - Body ground Always Below 1 Ω

    3. Measure the voltage according to the value in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      D73-1 (AM22) - Body ground Always 11 to 14 V
      D73-2 (AM21) - Body ground Always 11 to 14 V

    4. Reconnect the power source control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER SOURCE CONTROL ECU Click here