Theft Deterrent System (W/ Entry And Start System) Intrusion Sensor Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (INTRUSION SENSOR SOUND DETECT)

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. If no warnings operate or the system can be set even though the conditions to set the system are not met, the main body ECU (multiplex network body ECU) cannot perform recognition due to a cutoff of the ON signal from the courtesy light switch from the doors, engine hood or luggage compartment door, or some other problem.
   If the automatic alarm operates when it should not operate, it may be due to a false detection by the intrusion sensor (theft warning ultrasonic sensor) or due to the ON signal being input when there is a short circuit in the courtesy light switch of the doors, engine hood or luggage compartment door, or some other problem which would cause this to happen.
   

HINT:

In the following situations, the intrusion sensor (theft warning ultrasonic sensor) may operate and cause the automatic alarm system to operate even when the sensor is normal.

1. The driver steps away from the vehicle while other people, pets, etc. are in the vehicle.
   
2. There are things which move easily inside the vehicle, such as things hanging inside the vehicle or clothing hanging from the coat hooks.
   
3. A window or the sliding roof is open.
   
4. The vehicle is parked in a place with a lot of vibration or noise such as a parking garage.
   
5. The vehicle is being washed using a high-pressure spray gun or an automatic car washing machine.
   
6. The vehicle is continuously being struck or is vibrating due to hail or lightning.
   
7. The vehicle is continuously being subjected to impacts or is vibrating when snow or ice is being removed from the vehicle.
   
8. A frost prevention sheet which has an aluminum film is moved by wind, etc.
   

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. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the GTS on.
   

4. Enter the following menus: Body Electrical / Main Body / Data List.
   

5. Read the Data List according to the display on the GTS.
   

6. Make a metal-on-metal striking sound (such as by shaking keys) near the intrusion sensor and check the Data List.
   
   

   Main Body (Main Body ECU

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Intrusion Sensor Sound Detect*1*2	Sound detection status of the intrusion sensor (theft warning ultrasonic sensor) / ON or OFF	ON: Sound detected OFF: Sound not detected	Only displays "ON" on the Data List once. When checking again, disconnect and reconnect the GTS.

   1. *1: w/o Door Ajar Warning Buzzer Function
      

   NOTICE:

   1. *2: Perform the intrusion sensor operation inspection with the GTS disconnected (Click here).
      
   2. Make sure all the windows are closed
      

   HINT:

   When performing the above inspection, have the electrical key transmitter in the vehicle exterior detection area to perform certification (this prevents the alarm from sounding).

   OK:

   The GTS display changes correctly in response to the detection condition of the intrusion sensor (theft warning ultrasonic sensor).
   

7. From inside the vehicle, put your hand in front of the sensor and move it back and forth a distance of 0.3 m (0.984 ft.) and check the Data List.
   
   

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Intrusion Sensor	Status of the intrusion sensor detection (theft warning ultrasonic sensor) / ON or OFF	ON: Intrusion sensor detected OFF: Intrusion sensor not detected	-

   HINT:

   When performing the above inspection, have the electrical key transmitter in the vehicle exterior detection area to perform certification (this prevents the alarm from sounding).

   OK:

   The GTS display changes correctly in response to the detection condition of the intrusion sensor (theft warning ultrasonic sensor).
   

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	A
   NG (for LHD)	B
   NG (for RHD)	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
   E117-12 (ISIF) - Body ground	Always	10 kΩ or higher
   R7-12 (IOUT) - Body ground	Always	10 kΩ or higher

1. Remove the map light assembly (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-19 (GND)	Always	Below 1 Ω
   A-2 (IOUT) -B-6 (IOUT)	Always	Below 1 Ω
   A-4 (+B2) - B-2 (+B2)	Always	Below 1 Ω