THEFT DETERRENT SYSTEM Glass Breakage Sensor Circuit

DESCRIPTION

When the glass breakage sensor detects that the back door glass is tapped or broken, the sensor will set off an alarm for 27.5 seconds.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the intelligent tester main switch on.

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

   5. According to the display on the intelligent tester, read the Data List.

      Main Body (Main Body ECU (Multiplex Network Body ECU))

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Sealed Glas Brak Sen	Glass breakage sensor connecting/With or Without	With: Glass breakage sensor connected Without: Glass breakage sensor not connected	-

      OK
      When tapping on the glass with your finger, "With" is displayed on the intelligent tester screen.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (BATTERY - GLASS BREAKAGE SENSOR ECU - GROUND) Click here

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

2. CHECK HARNESS AND CONNECTOR (BATTERY - GLASS BREAKAGE SENSOR ECU - GROUND)

   
   

   1. Disconnect the E80 glass breakage sensor ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E80-6 (GND) - Body ground Always Below 1 Ω

      Standard Voltage
      Tester Connection Condition Specified Condition E80-2 (GB+B) - Body ground Power switch off 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - GLASS BREAKAGE SENSOR ECU)

   
   

   1. Disconnect E120 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E120-17 (GBS) - E80-5 (GBSI) Always Below 1 Ω E120-17 (GBS) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (GLASS BREAKAGE SENSOR ECU - GLASS BREAKAGE SENSOR MICROPHONE)

   
   

   1. Disconnect the M20 glass breakage sensor microphone connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E80-8 (MI+) - M20-2 (MIC+) Always Below 1 Ω E80-7 (MI-) - M20-1 (MIC-) Always Below 1 Ω E80-8 (MI+) - Body ground Always 10 kΩ or higher E80-7 (MI-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. INSPECT GLASS BREAKAGE SENSOR ECU ASSEMBLY (MICROPHONE OUTPUT)

   
   

   1. 

      Reconnect the glass breakage sensor ECU, glass breakage sensor microphone and main body ECU (multiplex network body ECU) connectors.

   2. Connect an oscilloscope to terminal E80-5 (GBSI) of the glass breakage sensor ECU and body ground.

   3. Turn the power switch on (IG).

      Text in Illustration

      *a	Component with harness connected (Glass Breakage Sensor ECU)

   4. 

      Check the signal waveform according to the condition(s) in the table below.

      Item	Condition
      Tester Connection	E80-5 (GBSI) - E80-6 (GND)
      Tool setting	1 V/DIV, 50 ms/DIV
      Vehicle condition	Tap the glass breakage sensor microphone with a hard object such as your fingernail.

      OK
      As shown in the illustration

   
   

   NG

   REPLACE GLASS BREAKAGE SENSOR MICROPHONE Click here

   OK

   REPLACE GLASS BREAKAGE SENSOR ECU ASSEMBLY Click here