THEFT DETERRENT SYSTEM, Diagnostic DTC:B276A

DTC Code DTC Name
B276A Short to GND in Tilt Sensor Signal Circuit

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
B276A Terminal CSIF of tilt sensor (yaw rate sensor) has not received signal for 5 seconds or more

  • Tilt sensor (yaw rate sensor)

  • Certification ECU (smart key ECU assembly)

  • Harness or connector

WIRING DIAGRAM

A01ENZEE03

INSPECTION PROCEDURE

Note


  • If the certification ECU (smart key ECU assembly) is replaced, refer to the Service Bulletin.

  • When replacing the tilt sensor (yaw rate sensor), perform zero point calibration Click here.

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

PROCEDURE


  1. CHECK TILT SENSOR (YAW RATE SENSOR) (CSIF)


    1. Using an oscilloscope, check the waveform.

      A01ES3NE01
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU [Smart Key ECU Assembly])

      		 *b CSIF Initial Signal
      *c CSIF Initial Response *d Approximately 1.0 seconds
      *e Initial Diagnosis *f Approximately 1.0 to 1.6 seconds
      *g Approximately 0.05 seconds *h Approximately 5.5 seconds
      *i Disarmed State *j Arming Preparation State
      Measurement Condition
      Tester Connection Content
      Tester Connection E30-21 (CSIF) - Body ground
      Tool Setting 2 V/DIV., 100 ms./DIV.
      Condition Theft deterrent system is set (system changes from disarmed state to arming preparation state)

      Tech Tips


      • If the tilt sensor (yaw rate sensor) is normal, an initial response is output in response to the HI input from the certification ECU (smart key ECU assembly).

      • If the waveform output remains LO, there may be a problem with the certification ECU (smart key ECU assembly), as there is no input from the certification ECU (smart key ECU assembly).

      OK
      The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).

    NG

    CHECK TILT SENSOR (YAW RATE SENSOR) (CSIF) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK TILT SENSOR (YAW RATE SENSOR) (CSIF)


    1. A01ENUTE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Tilt Sensor [Yaw Rate Sensor])

      Disconnect the tilt sensor (yaw rate sensor) connector.

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

      Standard Voltage
      Tester Connection Condition
      E50-5 (CSIF) - E50-1 (GND) Immediately after theft deterrent system set
      Result
      Result Proceed to
      CSIF voltage is below 1 V when theft deterrent system is set A
      CSIF voltage is 6.5 V or higher when theft deterrent system is set B

      Tech Tips

      With connector E50 of the tilt sensor (yaw rate sensor) disconnected, measure the voltage at CSIF when the theft deterrent system is set.


    B

    REPLACE TILT SENSOR (YAW RATE SENSOR) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - TILT SENSOR [YAW RATE SENSOR])


    1. Disconnect the E30 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the E50 tilt sensor (yaw rate sensor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E30-21 (CSIF) - E50-5 (CSIF) Always Below 1 Ω
      E30-21 (CSIF) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)