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:


  • "Spiral cable (Steering Angle Sensor)" is not displayed on the CAN 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 (spiral cable with sensor sub-assembly) branch line or connector

  • Power source circuit of steering sensor (spiral cable with sensor sub-assembly)

  • Steering sensor (spiral cable with sensor sub-assembly) ground circuit

  • Steering sensor (spiral cable with sensor sub-assembly)

WIRING DIAGRAM

A01KRMXE01
A01KSJHE01

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.

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  • 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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  • 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) and wait at least 60 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.

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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 (STEERING SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY) BRANCH LINE)


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

    2. A01KSMQC21
      *a

      Front view of wire harness connector

      (to Steering Sensor (Spiral Cable with Sensor Sub-assembly))

      Disconnect the E19 steering sensor (spiral cable with sensor sub-assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E19-3 (CANH) - E19-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (STEERING SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY))

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A01KSMQC23
      *a

      Front view of wire harness connector

      (to Steering Sensor (Spiral Cable with Sensor Sub-assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E19-1 (ESS) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

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

    3. A01KRTAC03
      *a

      Front view of wire harness connector

      (to Steering Sensor (Spiral Cable with Sensor Sub-assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E19-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
      E19-5 (BAT) - Body ground Power switch off 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    REPLACE STEERING SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)