- The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the seat position airbag sensor circuit for 2 seconds.
- Seat position airbag sensor 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: RM000000YTS03BX |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B1653/35 |
Seat Position Airbag Sensor Circuit Malfunction |
DESCRIPTION
The seat position airbag sensor circuit consists of the center airbag sensor and the seat position airbag sensor.
DTC B1653/35 is stored when a malfunction is detected in the seat position airbag sensor circuit.
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
B1653/35 |
When one of following conditions is met: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK CONNECTION OF 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 and the seat position airbag sensor.
OK:
The connectors are properly connected.
|
|
2. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor and the seat position airbag sensor.
(b) Check that the connectors (on the center airbag sensor side and seat position airbag sensor side) are not damaged
.
OK:
The connectors are not deformed or damaged.
|
|
3. |
CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (CENTER AIRBAG SENSOR - SEAT POSITION AIRBAG SENSOR) |
(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 |
|---|---|---|
|
1 - Body ground |
Ignition switch ON |
Below 1 V |
|
2 - 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) Using a service wire, connect terminals 13 (DSP-) and 14 (DSP+) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 - 2 |
Always |
Below 1 Ω |
(h) Disconnect the service wire from connector B.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 - 2 |
Always |
1 MΩ or higher |
|
1 - Body ground |
Always |
1 MΩ or higher |
|
2 - Body ground |
Always |
1 MΩ or higher |
|
|
4. |
CHECK SEAT POSITION AIRBAG SENSOR |
|
(a) Connect the connectors to the center airbag sensor and the seat position airbag sensor. |
(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 stored
.
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs
.
OK:
DTC B1653/35 is not output.
HINT:
Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.
|
|
5. |
REPLACE SEAT POSITION AIRBAG SENSOR |
(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 seat position airbag sensor
.
HINT:
Perform inspection using parts from a normal vehicle if possible.
|
|
6. |
CHECK CENTER AIRBAG SENSOR |
|
|
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds. |
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Clear the DTCs
.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Check for DTCs
.
OK:
DTC B1653/35 is not output.
HINT:
Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.
|
|
7. |
CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - FRONT SEAT INNER BELT LH) |
(a) Disconnect the floor wire connector from the front seat inner belt LH.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
O4-2 (LSP+) - Body ground |
Ignition switch ON |
Below 1 V |
|
O4-4 (LSP-) - Body ground |
Ignition switch ON |
Below 1 V |
(e) Turn the ignition switch off.
(f) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(g) Using a service wire, connect terminals 13 (DSP-) and 14 (DSP+) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O4-2 (LSP+) - O4-4 (LSP-) |
Always |
Below 1 Ω |
(i) Disconnect the service wire from connector B.
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O4-2 (LSP+) - O4-4 (LSP-) |
Always |
1 MΩ or higher |
|
O4-2 (LSP+) - Body ground |
Always |
1 MΩ or higher |
|
O4-4 (LSP-) - Body ground |
Always |
1 MΩ or higher |
|
|
|