| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Theft Deterrent/Keyless Entry | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002ZDA002X |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
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
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (GLASS BREAKAGE SENSOR) |
(a) 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.
|
|
2. |
INSPECT FUSE (ECU-IG No. 1) |
|
(a) Remove the ECU-IG No. 1 fuse from the main body ECU. |
(b) 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 |
|
|
3. |
CHECK HARNESS AND CONNECTOR (GLASS BREAKAGE SENSOR ECU - BATTERY AND BODY GROUND) |
|
(a) Disconnect the H64 glass breakage sensor ECU connector. |
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
H64-2 (GB+B) - H64-6 (GND) |
Always |
11 to 14 V |
|
H64-3 (GBIG) - H64-6 (GND) |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H64-6 (GND) - Body ground |
Always |
Below 1 Ω |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - GLASS BREAKAGE SENSOR ECU) |
|
(a) Disconnect the H4 main body ECU connector. |
(b) Disconnect the H64 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 |
|---|---|---|
|
H4-17 (GBS) - H64-5 (GBS1) |
Always |
Below 1 Ω |
|
H4-17 (GBS) or H64-5 (GBS1) - Body ground |
Always |
10 kΩ or higher |
|
|
5. |
CHECK HARNESS AND CONNECTOR (GLASS BREAKAGE SENSOR ECU - GLASS BREAKAGE SENSOR MICROPHONE) |
|
(a) Disconnect the H64 glass breakage sensor ECU connector. |
(b) Disconnect the H65 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 |
|---|---|---|
|
H64-8 (MI+) - H65-3 (MIC+) |
Always |
Below 1 Ω |
|
H64-7 (MI-) - H65-4 (MIC-) |
||
|
H64-8 (MI+) or H65-3 (MIC+)- Body ground |
Always |
10 kΩ or higher |
|
|
6. |
CHECK GLASS BREAKAGE SENSOR ECU (GLASS BREAKAGE SENSOR OUTPUT) |
|
(a) Reconnect the H64 glass breakage sensor ECU connector. |
(b) Reconnect the H65 glass breakage sensor microphone connector.
(c) Reconnect the J4 main body ECU connector.
(d) Turn the ignition switch to ON.
(e) Using an oscilloscope, check the waveform.
Standard:
|
Test Connector |
Tool Setting |
Vehicle Condition |
Specified Condition |
|---|---|---|---|
|
H64-5 (GBS1) - 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 |
|
|
|