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

  • Harness or connector

WIRING DIAGRAM

A001C8IE32
*a from Battery
*b Tilt Sensor (Yaw Rate Sensor)
*c Certification ECU

CAUTION / NOTICE / HINT

Note


  • If the certification ECU 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.

      A0019QXE03
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU)

      		 *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 L16-21 (INCS) - 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.

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

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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


    1. A001AMDE02
      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
      L71-5 (CSIF) - L71-1 (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 L71 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 - TILT SENSOR [YAW RATE SENSOR])


    1. Disconnect the L16 certification ECU connector.

    2. Disconnect the L71 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
      L16-21 (INCS) - L71-5 (CSIF) Always Below 1 Ω
      L16-21 (INCS) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR