CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU) Power Management Control ECU Communication Stop Mode

DESCRIPTION

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

Either condition is met:


  • "Hybrid Vehicle Control" and/or "Power Management1" is not displayed on the CAN Bus Check screen of the GTS Click here

  • Communication system DTCs (DTCs that start with U) that correspond to "Power Management Control ECU Communication Stop Mode" in "DTC Combination Table" are output Click here


  • Power management control ECU branch line or connector

  • Power source circuit of power management control ECU

  • Power management control ECU ground circuit

  • Power management control ECU

WIRING DIAGRAM

A005EX5E15
A005EX5E16

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the power switch on (IG), wait at least 60 seconds, and then drive the vehicle at a speed of 50 km/h (31 mph) or more at least 1.72 seconds.

  • After the repair, perform CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.

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

Tech Tips


  • Operating the power 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 LINES (POWER MANAGEMENT CONTROL ECU BRANCH LINE)


    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. A005EOIE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the L6 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Value
      L6-25 (CA1H) - L6-24 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU)

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A0059N1E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the L5 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Value
      L5-6 (E1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. Reconnect the L5 and L6 power management control ECU connectors.

    2. Reconnect the cable to the negative (-) auxiliary battery terminal.

    3. A005BSME02
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Value
      A22-5 (+B1) - Body ground Power switch on (IG) 11 to 14 V
      A21-2 (+B2) - Body ground Power switch on (IG) 11 to 14 V

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE TERMINAL)