THEFT DETERRENT SYSTEM, Diagnostic DTC:B276A

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

DESCRIPTION

This DTC is stored when terminal CSIF of the theft warning tilt sensor has not received a signal for 5 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area
B276A Short to GND in Tilt Sensor Signal Circuit Terminal CSIF of theft warning tilt sensor has not received signal for 5 seconds or more

  • Theft warning tilt sensor

  • Main body ECU (multiplex network body ECU)

  • Harness or connector

WIRING DIAGRAM

A01XO0NE11
*a from Battery
*b ECU-B NO.1
*c Theft Warning Tilt Sensor
*d Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note


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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    *: w/ Door Control Battery

    Click here

PROCEDURE


  1. CHECK WAVEFORM (THEFT WARNING TILT SENSOR) (CSIF)


    1. Using an oscilloscope, check the waveform.

      A01XN0SC06
      *a

      Component with harness connected

      (Main Body ECU [Multiplex Network Body 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
      Item Content
      Tester Connection I47-6 (GCS) - 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 theft warning tilt sensor is normal, an initial response is output in response to the HI input from the main body ECU (multiplex network body ECU).

      • If the waveform output remains LO, there may be a problem with the main body ECU (multiplex network body ECU), as there is no input from the main body ECU (multiplex network body ECU).

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK VOLTAGE (THEFT WARNING TILT SENSOR) (CSIF)


    1. A01XPGJC10
      *a

      Front view of wire harness connector

      (to Theft Warning Tilt Sensor)

      Disconnect the theft warning tilt sensor connector.

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

      Standard Voltage
      Tester Connection Condition
      I127-5 (CSIF) - I127-1 (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 I127 of the theft warning tilt sensor disconnected, measure the voltage at CSIF when the theft deterrent system is set.


    B

    REPLACE THEFT WARNING TILT SENSOR Click here

    A

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - THEFT WARNING TILT SENSOR)


    1. Disconnect the I47 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the I127 theft warning tilt sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I47-6 (GCS) - I127-5 (CSIF) Always Below 1 Ω
      I47-6 (GCS) - Body ground Always 10 kΩ or higher
      I127-5 (CSIF) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK (for LHD)
      OK (for RHD)
      NG

    OK (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR