Glass Breakage Sensor ECU Circuit: Procedure

1. Using the Techstream, read the Data List.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Glass Break Sensor Detection	Glass breakage sensor detection / ON or OFF	ON: Glass breakage sensor ON OFF: Glass breakage sensor OFF	-

   OK

   When tapping on the door glass with your finger, "ON" is displayed on the Techstream screen.

NG → See step   2 

OK → See step   8 

1. Remove the ECU-IG No. 1 fuse from the main body ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   ECU-IG No. 1 fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the J57 glass breakage sensor ECU connector.
   Fig 1: Identifying J57 Glass Breakage Sensor ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   J57-2 (GB+B) - J57-6 (GND)	Always	11 to 14 V
   J57-3 (GBIG) - J57-6 (GND)	Ignition switch ON	11 to 14 V
   	Ignition switch OFF	Below 1 V

   Standard resistance

   Tester Connection	Condition	Specified Condition
   J57-6 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the J4 main body ECU connector.
   Fig 2: Checking Harness And Connector (Main Body ECU - Glass Breakage Sensor ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the J57 glass breakage sensor ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   J4-17 (GBS) - J57-5 (GBSI)	Always	Below 1 Ω
   J4-17 (GBS) or J57-5 (GBSI) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the J57 glass breakage sensor ECU connector.
   Fig 3: Checking Harness And Connector (Glass Breakage Sensor ECU -- Glass Breakage Sensor Microphone)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the J58 glass breakage sensor microphone connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   J57-8 (MI+) - J58-3 (MIC+)	Always	Below 1 Ω
   J57-7 (MI-) - J58-4 (MIC-)
   J57-8 (MI+) or J58-3 (MIC+)- Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the J57 glass breakage sensor ECU connector.
   Fig 4: Checking Glass Breakage Sensor ECU (Glass Breakage Sensor Output) With Waveform Reference

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reconnect the J58 glass breakage sensor microphone connector.
3. Reconnect the J4 main body ECU connector.
4. Turn the ignition switch ON.
5. Using an oscilloscope, check the waveform.

   Standard

   Test Connector	Tool Setting	Vehicle Condition	Specified Condition
   J57-5 (GBSI) - Body ground	1 V/DIV., 50 msec./DIV.	Ignition switch ON Tap the door glass with a hard object such as your fingernail	Pulse generation

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (for Column Shift Type)	B
   NG (for Floor Shift Type)	C

B → See step   9 

C → See step   10 

A → See step   7