CAN COMMUNICATION SYSTEM Power Management Control ECU Communication Stop Mode

DESCRIPTION

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

  • "Electric Power Control" is not displayed on the CAN Bus Check screen of GTS.

  • Applies to "Power Management Control ECU Communication Stop Mode" in the DTC Combination Table.

  1. Power source circuit of power management control ECU

  2. Power management control ECU branch wire or connector

  3. Power management control ECU

WIRING DIAGRAM

A01ELCJE02

INSPECTION PROCEDURE

Note


  • Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.

  • Turn the ignition switch off before inspecting CAN bus wires for a ground short.

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

  • 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 any doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips


  • Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


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


    1. Turn the ignition switch off.

    2. A01ELA6E17
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector (D43).

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

      Standard Resistance
      Tester Connection Condition Specified Value
      D43-14 (CA1H) - D43-13 (CA1L) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN NO. 1 BUS BRANCH WIRE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A01ELA6E19
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Value
      D43-1 (AM22) - Body Ground Always 11 to 14 V
      D43-2 (AM21) - Body Ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE TERMINAL)

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A01ELA6E20
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Value
      D43-6 (GND) - Body Ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here