DESCRIPTION
The seat belt buckle switch LH circuit consists of the center airbag sensor assembly and front seat inner belt assembly LH.
DTC B1656/38 is stored when a malfunction is detected in the seat belt buckle switch LH circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1656/38 |
|
|
WIRING DIAGRAM
PROCEDURE
1. |
CHECK CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and front seat inner belt assembly LH.
OK:
The connectors are properly connected.
HINT:
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
(d) Disconnect the connectors from the center airbag sensor assembly and front seat inner belt assembly LH.
(e) Check that the terminals of connectors are not damaged.
OK:
The terminals are not deformed or damaged.
NG |
REPLACE FLOOR WIRE |
|
2. |
CHECK FLOOR WIRE (OPEN) |
(a) Using SST, connect terminals 10 (LBE+) and 18 (LBE-) of connector B.
NOTICE:
Do not forcibly insert SST into the terminals of the connector when connecting the wire.
SST: 09843-18040
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
L19-1 (LBE+) - L19-3 (LBE-) |
Always |
Below 1 Ω |
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
*4 |
Front view of wire harness connector (to Center Airbag Sensor Assembly) |
*5 |
Front view of wire harness connector (to Front Seat Inner Belt Assembly LH) |
*6 |
Connector B |
*7 |
Connector C |
- |
- |
NG |
REPLACE FLOOR WIRE |
|
3. |
CHECK FLOOR WIRE (SHORT) |
(a) Disconnect SST from connector B. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
L19-1 (LBE+) - L19-3 (LBE-) |
Always |
1 MΩ or higher |
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
*4 |
Front view of wire harness connector (to Front Seat Inner Belt Assembly LH) |
*5 |
Connector C |
NG |
REPLACE FLOOR WIRE |
|
4. |
CHECK FLOOR WIRE (SHORT TO B+) |
(a) Connect the cable to the negative (-) battery terminal. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
L19-1 (LBE+) - Body ground |
Ignition switch ON |
Below 1 V |
L19-3 (LBE-) - Body ground |
Ignition switch ON |
Below 1 V |
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
*4 |
Front view of wire harness connector (to Front Seat Inner Belt Assembly LH) |
*5 |
Connector C |
NG |
REPLACE FLOOR WIRE |
|
5. |
CHECK FLOOR WIRE (SHORT TO GROUND) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
L19-1 (LBE+) - Body ground |
Always |
1 MΩ or higher |
L19-3 (LBE-) - Body ground |
Always |
1 MΩ or higher |
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
*4 |
Front view of wire harness connector (to Front Seat Inner Belt Assembly LH) |
*5 |
Connector C |
NG |
REPLACE FLOOR WIRE |
|
6. |
CHECK FRONT SEAT INNER BELT ASSEMBLY LH |
(a) Connect the connectors to the center airbag sensor assembly and front seat inner belt assembly LH. |
|
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory (See page ).
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs (See page ).
OK:
DTC B1656/38 is not output.
Text in Illustration
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
HINT:
Codes other than DTC B1656/38 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK |
|
7. |
REPLACE FRONT SEAT INNER BELT ASSEMBLY LH |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Replace the front seat inner belt assembly LH with a known good part (See page ).
HINT:
Perform the following inspection using known good parts from another vehicle if possible.
|
8. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Connect the cable to the negative (-) battery terminal. |
|
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Clear the DTCs stored in memory (See page ).
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Check for DTCs (See page ).
OK:
DTC B1656/38 is not output.
Text in Illustration
*1 |
Front Seat Inner Belt Assembly LH |
*2 |
Center Airbag Sensor Assembly |
HINT:
Codes other than DTC B1656/38 may be output at this time, but they are not related to this check.
OK |
END |
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
Check Mode Procedure
CHECK MODE PROCEDURE
HINT:
Techstream only:
Compared to normal mode, check mode is more sensitive to malfunctions. Therefore,
check mode can detect malfunctions that cannot be detected in normal mode.
NOTICE:
All the stored DTCs and freeze frame data ar ...
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
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Dtc Check / Clear
DTC CHECK / CLEAR
1. DTC CHECK/CLEAR (When Using the Techstream)
(a) Check for DTCs.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Read the DTCs following the prompts on the Techstream. Enter ...