Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

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

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

INSPECT MAP LAMP ASSEMBLY

DESCRIPTION

1. 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.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
   
2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   
3. w/ Door Control Battery:
   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 (Click here).
   

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

1. Using an oscilloscope, check the waveform.
   

   
   
   
   
   

   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

   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)

   HINT:

   1. 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).
      
   2. 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

   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

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

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