- The center airbag sensor assembly 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 front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).
- Front airbag sensor RH malfunction
- Front airbag sensor LH malfunction
- Center airbag sensor assembly malfunction
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJRJ |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B161A/8A; Lost Communication with Front Satellite Sensor Bus; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B161A/8A |
Lost Communication with Front Satellite Sensor Bus |
DESCRIPTION
The front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit) is composed of the center airbag sensor assembly, front airbag sensor RH and front airbag sensor LH.
The front airbag sensor RH or front airbag sensor LH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B161A/8A is stored when a malfunction is detected in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B161A/8A |
When one of following conditions is met: |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Turn the ignition switch off.
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Check for DTCs (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
DTCs B1613/83 and B1618/84 are not output |
A |
|
DTC B1613/83 is output |
B |
|
DTC B1618/84 is output |
C |
| B |
|
| C |
|
|
|
2. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Turn the ignition switch to ON, and wait for at least 60 seconds.
(b) Clear the DTCs stored in the memory (See page
).
(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Check for DTCs (See page
).
OK:
DTC B161A/8A is not output.
HINT:
Codes other than DTC B161A/8A may be output at this time, but they are not related to this check.
| OK |
|
| NG |
|
|
|