THEFT DETERRENT SYSTEM(w/ Entry and Start System), Diagnostic DTC:B2762

DESCRIPTION

• The intrusion sensor (theft warning ultrasonic sensor) conducts self-diagnosis immediately after power is supplied to the sensor (when the theft deterrent system is set).

  If a malfunction is detected in the ISIF line, the main body ECU (multiplex network body ECU) stores this DTC.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - BATTERY AND BODY GROUND)

   
   
   1. 

      Disconnect the map light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition R7-15 (+B2) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition R7-17 (GND9) - Body ground Always Below 1 Ω

      Table 1. Text in Illustration

      *a	Front view of wire harness connector (to Map Light Assembly)

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

2. Click here

   CHECK INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR) (IOUT)

   
   
   1. 

      Using an oscilloscope, check the waveform.

      Table 2. Text in Illustration

      *a	Component with harness connected (Map Light Assembly)	*b	IOUT Initial Signal
      *c	IOUT 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

      Table 3. Measurement Condition

      Tester Connection	Content
      Tester Connection	R7-12 (IOUT) - 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)

      Tip:
      

      • If the intrusion sensor (theft warning ultrasonic 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).

      Table 4. Result

      Result	Proceed to
      OK (There is an initial response)	A
      NG (Waveform output remains LO)	B
      NG (There is no initial response and the waveform output remains HI)	C

   
   
   • A

     USE SIMULATION METHOD TO CHECK (Click here)

   • BClick here
   • CClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEXNETWORK BODY ECU] - MAP LIGHT ASSEMBLY)

   
   

   1. Disconnect the E117 main body ECU (multiplex network body ECU) connector.

   2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E117-12 (ISIF) - R7-12 (IOUT) Always Below 1 Ω R7-12 (IOUT) - Body ground Always 10 kΩ or higher E117-12 (ISIF) - Body ground Always 10 kΩ or higher

      Table 5. Result

      Result	Proceed to
      OK (for LHD)	A
      OK (for RHD)	B
      NG	C

   
   
   • A

     REPLACE MAIN BODY ECU (MULTIPLEXNETWORK BODY ECU) (Click here)

   • B

     REPLACE MAIN BODY ECU (MULTIPLEXNETWORK BODY ECU) (Click here)

   • C

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   INSPECT MAP LAMP ASSEMBLY

   
   

   1. Remove the intrusion sensor (theft warning ultrasonic sensor) (Click here).

   2. Remove the intrusion sensor (theft warning ultrasonic sensor) from the map light assembly (Click here).

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition A-1 (GND) -B-17 (GND9) Always Below 1 Ω A-2 (IOUT) -B-12 (IOUT) Always Below 1 Ω A-4 (+B2) - B-15 (+B2) Always 10 kΩ or higher

   
   
   • OK

     REPLACE INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR) (Click here)

   • NG

     REPLACE MAP LAMP ASSEMBLY (Click here)