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.

    Click here

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

    Click here


  • Steering sensor branch line or connector

  • Power source circuit of steering sensor

  • Steering sensor ground circuit

  • Steering sensor

WIRING DIAGRAM

Figure 1. w/o VGRS System:

B003UAZE01

Figure 2. w/ VGRS System:

B003VYDE03

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.

    Click here

  • Before measuring the resistance of the CAN bus, turn the engine 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 engine 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.

    Click here

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

    DTC check procedure: Turn the engine switch on (IG) and wait at least 60 seconds, turn the lane departure alert system on using the LDA main switch, and then drive the vehicle at a speed of 36 km/h (22 mph) or more for 7 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 as normal.

    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 (STEERING SENSOR BRANCH LINE)


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

    2. B003VJGC02
      *A w/o VGRS System
      *B w/ VGRS System
      *a

      Front view of wire harness connector

      (to Steering Sensor)

      Disconnect the K29 or K30 steering sensor connector.

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

      Standard Resistance
      w/o VGRS System
      Tester Connection Condition Specified Condition
      K29-3 (CANH) - K29-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      w/ VGRS System
      Tester Connection Condition Specified Condition
      K30-3 (CANH) - K30-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result Proceed to
      OK (w/o Stop and Start System) A
      OK (w/ Stop and Start System) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Click here

    C

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

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B003VJGC03
      *A w/o VGRS System
      *B w/ VGRS System
      *a

      Front view of wire harness connector

      (to Steering Sensor)

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

      Standard Resistance
      w/o VGRS System
      Tester Connection Condition Specified Condition
      K29-1 (ESS) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      w/ VGRS System
      Tester Connection Condition Specified Condition
      K30-1 (ESS) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

    3. B003VJGC04
      *A w/o VGRS System
      *B w/ VGRS System
      *a

      Front view of wire harness connector

      (to Steering Sensor)

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

      Standard Voltage
      w/o VGRS System
      Tester Connection Condition Specified Condition
      K29-4 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      K29-8 (BAT) - Body ground Always 11 to 14 V
      w/ VGRS System
      Tester Connection Condition Specified Condition
      K30-4 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      K30-5 (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)

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B003UU4C08
      *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
      K29-1 (ESS) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K29-4 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      K29-8 (BAT) - Body ground Always 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (IG1 terminal) B
      NG (Except IG1 terminal) C

    A

    REPLACE STEERING SENSOR Click here

    B

    GO TO STOP AND START SYSTEM (FOR BACKUP BOOST CONVERTER CIRCUIT) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)