CAN COMMUNICATION SYSTEM Steering Angle Sensor Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Steering Angle Sensor Communication Stop Mode

Either condition is met:


  • Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "Communication Bus Check" screen of the GTS.

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  • Communication system DTCs (DTCs that start with U) that correspond to "Steering Angle Sensor Communication Stop Mode" in "DTC Combination Table" are output.

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  • Steering sensor branch line or connector

  • Power source circuit of steering sensor

  • Steering sensor ground circuit

  • Steering sensor

WIRING DIAGRAM

A00296EE17
A00296EE16

CAUTION / NOTICE / HINT

Note


  • 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.

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  • Before measuring the resistance of the CAN bus, turn the ignition 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 (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

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

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

    DTC check procedure: Turn the ignition switch to ON and wait at least 60 seconds. Turn the cruise control main switch on and then drive the vehicle at a speed of 36 km/h (22 mph) or more for 1.72 seconds or more.

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

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  • 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 (STEERING SENSOR BRANCH LINE)


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

    2. A0028IOC01
      *a

      Front view of wire harness connector

      (to Steering Sensor)

      Disconnect the F58 steering sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F58-3 (CANH) - F58-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (STEERING SENSOR)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A0028IOC02
      *a

      Front view of wire harness connector

      (to Steering Sensor)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F58-1 (ESS) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

    3. A0028IOC03
      *a

      Front view of wire harness connector

      (to Steering Sensor)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F58-4 (IG1) - Body ground Ignition switch ON 11 to 14 V
      F58-5 (BAT) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    REPLACE STEERING SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)