- The center airbag sensor receives a line short circuit signal 5 times in the side squib LH circuit during primary check.
- Side squib LH malfunction
- Center airbag sensor malfunction
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Supplemental Restraint Systems | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002O2S00JX |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B1820/55 |
Short in Front Driver Side - Side Squib Circuit |
|
DTC |
B1821/55 |
Open in Front Driver Side - Side Squib Circuit |
|
DTC |
B1822/55 |
Short to GND in Front Driver Side - Side Squib Circuit |
|
DTC |
B1823/55 |
Short to B+ in Front Driver Side - Side Squib Circuit |
DESCRIPTION
The side squib LH circuit consists of the center airbag sensor and the front seat side airbag LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the side squib LH circuit.
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
B1820/55 |
When one of following conditions is met: |
|
|
B1821/55 |
When one of following conditions is met:
|
|
|
B1822/55 |
When one of following conditions is met:
|
|
|
B1823/55 |
When one of following conditions is met:
|
|
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
-
Perform the simulation method by selecting "check mode" (signal check) with the Techstream
.
-
After selecting "check mode" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on various types of roads
.
PROCEDURE
|
1. |
CHECK CONNECTOR |
(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 connector is properly connected to the front seat side airbag LH.
OK:
The connector is properly connected.
HINT:
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.
(d) Disconnect the connector from the front seat side airbag LH.
(e) Check that the terminal of the connector is not damaged.
OK:
The terminal is not deformed or damaged.
|
|
2. |
CHECK FRONT SEAT SIDE AIRBAG LH (SEAT AIRBAG WIRE LH) |
|
(a) Connect the black wire side of SST (resistance: 2.1 Ω) to connector C. CAUTION:
Never connect the tester to the front seat side airbag LH (side squib LH) for measurement, as this may lead to a serious injury due to airbag deployment. NOTICE:
|
SST: 09843-18061
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs
.
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs
.
Result
|
Result |
Proceed to |
|
DTC B1820, B1821, B1822, B1823 or 55 is output |
A |
|
DTC B1820, B1821, B1822, B1823 or 55 is not output (w/ Manual Seat) |
B |
|
DTC B1820, B1821, B1822, B1823 or 55 is not output (w/ Power Seat) |
C |
HINT:
Codes other than DTC B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.
|
|
3. |
CHECK CONNECTOR |
(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) Check that the connector is properly connected to the center airbag sensor assembly.
OK:
The connector is properly connected.
(e) Disconnect the connector from the center airbag sensor assembly.
(f) Check that the terminal of the connector is not damaged.
OK:
The terminal is not deformed or damaged.
(g) Check that the short spring for the floor wire connector with the activation prevention mechanism is not deformed or damaged.
OK:
The short spring is not deformed or damaged.
|
|
4. |
CHECK FLOOR WIRE (SIDE SQUIB LH CIRCUIT) |
|
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds. |
(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 |
|---|---|---|
|
O6-1 (SFL+) - Body ground |
Ignition switch ON |
Below 1 V |
|
O6-2 (SFL-) - Body ground |
Ignition switch ON |
Below 1 V |
(d) Turn the ignition switch off.
(e) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O6-1 (SFL+) - O6-2(SFL-) |
Always |
Below 1 Ω |
(g) Release the activation prevention mechanism built into connector B
.
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O6-1 (SFL+) - O6-2 (SFL-) |
Always |
1 MΩ or higher |
|
O6-1 (SFL+) - Body ground |
Always |
1 MΩ or higher |
|
O6-2 (SFL-) - Body ground |
Always |
1 MΩ or higher |
|
|
5. |
CHECK CENTER AIRBAG SENSOR |
|
(a) Restore the released activation prevention mechanism of connector B to the original condition. |
(b) Connect the connectors to the front seat side airbag LH and the center airbag sensor.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs
.
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs
.
OK:
DTC B1820, B1821, B1822, B1823 or 55 is not output.
HINT:
Codes other than DTC B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.
|
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