CAN COMMUNICATION SYSTEM(w/ Central Gateway ECU) Hybrid Vehicle Control ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Hybrid Vehicle Control ECU Communication Stop Mode

Either condition is met:


  • Communication stop for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check" screen of the GTS Click here.

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

  • Hybrid vehicle control ECU branch line or connector

  • Power source circuit of hybrid vehicle control ECU

  • Hybrid vehicle control ECU ground circuit

  • Hybrid vehicle control ECU

WIRING DIAGRAM

B005XIFE05

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 the 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


  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE


  1. CHECK FOR OPEN IN CAN BUS LINES (HYBRID VEHICLE CONTROL ECU BRANCH LINE)


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

    2. Disconnect the L5 and L6 hybrid vehicle control ECU connectors.

    3. B005Y53E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L5-34 (CA2H) - L5-35 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      L6-25 (CA1H) - L6-24 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU)

    OK

  2. CHECK ECU POWER SOURCE CIRCUIT


    1. Check the ECU power source circuit.

      Click here


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)