DESCRIPTION
The side squib LH circuit consists of the center airbag sensor assembly and front seat side airbag assembly LH.
The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the side squib LH circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1825/56 |
|
|
B1826/56 |
|
|
B1827/56 |
|
|
B1828/56 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
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 front seat side airbag assembly LH and center airbag sensor assembly.
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 front seat side airbag assembly LH and center airbag sensor assembly.
(e) Check that the terminals of the connectors are not damaged.
OK:
The terminals are not deformed or damaged.
(f) Check that the short spring for the floor wire with the activation prevention mechanism is not deformed or damaged.
OK:
The short spring is not deformed or damaged.
Text in Illustration
*1 |
Side squib LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
NG |
REPLACE FLOOR WIRE |
|
2. |
CHECK FRONT SEAT SIDE AIRBAG ASSEMBLY LH (SIDE SQUIB LH) |
(a) Connect the connector to the center airbag sensor assembly. |
|
(b) Connect SST (resistance 2.1 Ω) to connector C.
CAUTION:
Never connect an electrical tester to the front seat side airbag assembly LH (side squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
SST: 09843-18061
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory (See page ).
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs (See page ).
OK:
DTC B1825, B1826, B1827, B1828 or 56 is not output.
HINT:
Codes other than DTCs B1825, B1826, B1827, B1828 and 56 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Side squib LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Front view of wire harness connector (to Front Seat Side Airbag Assembly LH) |
*4 |
Connector C |
OK |
REPLACE FRONT SEAT SIDE AIRBAG ASSEMBLY LH |
|
3. |
CHECK FLOOR WIRE (SIDE SQUIB LH CIRCUIT) |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect SST from connector C.
(d) Disconnect the floor wire from the center airbag sensor assembly.
(e) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
Lz1-1 (SFL+) - Body ground |
Ignition switch ON |
Below 1 V |
Lz1-2 (SFL-) - Body ground |
Ignition switch ON |
Below 1 V |
(f) Check for an open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Lz1-1 (SFL+) - Lz1-2 (SFL-) |
Always |
Below 1 Ω |
(g) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Lz1-1 (SFL+) - Body ground |
Always |
1 MΩ or higher |
Lz1-2 (SFL-) - Body ground |
Always |
1 MΩ or higher |
(h) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B (See page ).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Lz1-1 (SFL+) - Lz1-2 (SFL-) |
Always |
1 MΩ or higher |
*1 |
Side squib LH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Floor Wire |
*4 |
Front view of wire harness connector (to Front Seat Side Airbag Assembly LH) |
*5 |
Connector C |
NG |
REPLACE FLOOR WIRE |
|
4. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Restore the released activation prevention mechanism of connector B to the original condition. |
|
(b) Connect the connectors to the front seat side airbag assembly LH and center airbag sensor assembly.
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory (See page ).
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs (See page ).
OK:
DTC B1825, B1826, B1827, B1828 or 56 is not output.
Text in Illustration
*1 |
Side squib LH |
*2 |
Center Airbag Sensor Assembly |
HINT:
Codes other than DTCs B1825, B1826, B1827, B1828 and 56 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
Customize Parameters
CUSTOMIZE PARAMETERS
1. INTUITIVE PARKING ASSIST SYSTEM (See page
)
2. POWER DOOR LOCK CONTROL SYSTEM (See page
)
3. WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System) (See page
)
4. WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System) (Se ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" ...
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When the ignition switch is ON, the center airbag sensor assembly transmits front
seat inner belt status signals to the combination meter assembly through CAN. If
the driver seat belt is not fastened, the combination meter assembly blinks the ...