Toyota Tundra Service Manual: Glass Breakage Sensor ECU Circuit

DESCRIPTION

When the glass breakage sensor detects the glass is broken (1st time), the sensor will set off an alarm for 20 seconds (pre-alarm). If the glass breakage sensor detects that more glass is broken (2nd time or more), the sensor will set off an alarm for 60 seconds.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (Glass Break Sensor Detection)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

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.

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

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

(a) Disconnect the glass breakage sensor ECU connector.

*a

Front view of wire harness connector

(to Glass Breakage Sensor ECU)

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

Standard Voltage:

Tester Connection

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J57-6 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - GLASS BREAKAGE SENSOR ECU)

(a) Disconnect the J165 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the J57 glass breakage sensor ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J165-7 (GBS) - J57-5 (GBSI)

Always

Below 1 Ω

J165-7 (GBS) or J57-5 (GBSI) - Other terminals and 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)

(a) Disconnect the J57 glass breakage sensor ECU connector.

(b) Disconnect the J58 glass breakage sensor microphone connector.

(c) 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+)- Other terminals and body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK GLASS BREAKAGE SENSOR ECU (GLASS BREAKAGE SENSOR OUTPUT)

(a) Turn the ignition switch to ON.

(b) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(Glass Breakage Sensor ECU)

*b

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

(Waveform)

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

6.

REPLACE GLASS BREAKAGE SENSOR MICROPHONE

(a) Temporarily replace the glass breakage sensor microphone with a new or normally functioning one.

  • for Column Shift Type:

    Click here

  • for Floor Shift Type:

    Click here

NEXT

7.

CHECK GLASS BREAKAGE SENSOR ECU (GLASS BREAKAGE SENSOR OUTPUT)

(a) Turn the ignition switch to ON.

(b) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(Glass Breakage Sensor ECU)

*b

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

(Waveform)

OK

END (GLASS BREAKAGE SENSOR MICROPHONE WAS DEFECTIVE)

NG

REPLACE GLASS BREAKAGE SENSOR ECU

    Engine Hood Courtesy Switch Circuit

    Horn Circuit

    See More:

    Toyota Tundra Service Manual > Sliding Roof System: Data List / Active Test
    DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be disc ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2024 Copyright www.ttundra.com
    0.0163