- Center airbag sensor assembly detects line short circuit signal in front passenger side squib 2nd step circuit 5 times during primary check.
- Front passenger side squib 2nd step malfunction
- Center airbag sensor assembly malfunction
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJQP |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1815/54-B1818/54; Short in Front Passenger Side Squib 2nd Step Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B1815/54 |
Short in Front Passenger Side Squib 2nd Step Circuit |
|
DTC |
B1816/54 |
Open in Front Passenger Side Squib 2nd Step Circuit |
|
DTC |
B1817/54 |
Short to GND in Front Passenger Side Squib 2nd Step Circuit |
|
DTC |
B1818/54 |
Short to B+ in Front Passenger Side Squib 2nd Step Circuit |
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front passenger airbag assembly.
The circuit signals the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front passenger side squib 2nd step circuit.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1815/54 |
When one of following conditions is met: |
|
|
B1816/54 |
When one of following conditions is met:
|
|
|
B1817/54 |
When one of following conditions is met:
|
|
|
B1818/54 |
When one of following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
-
Perform the simulation method by selecting Check Mode (signal check) with the Techstream (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: CHECK MODE PROCEDURE](/t3Portal/stylegraphics/info.gif)
).
-
After selecting Check Mode (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city street or rough road (See page
).
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 passenger airbag assembly.
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 passenger airbag assembly.
(e) Check that the No. 2 instrument panel wire connector (on the front passenger airbag assembly side) is not damaged.
OK:
The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
| NG |
|
REPLACE NO. 2 INSTRUMENT PANEL WIRE |
|
|
2. |
CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP) |
SST: 09843-18061
(a) Disconnect the connector from the front passenger airbag assembly.
Text in Illustration
|
*1 |
Front Passenger Side Squib 2nd Step |
*2 |
Center Airbag Sensor Assembly |
|
*3 |
Connector E |
*4 |
Color: Black |
|
*5 |
DTC 54 |
- |
- |
|
*a |
Front view of wire harness connector (to Front Passenger Side Squib 2nd Step) |
*b |
Front view of DLC3 |
(b) Connect SST (resistance 2.1 Ω) to connector E (black connector).
CAUTION:
Never connect a tester to the front passenger airbag assembly (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
- Do not forcibly insert SST into the terminals of the connector when connecting.
- Insert SST straight into the terminals of the connector.
(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 stored in the 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 the DTCs (See page
).
OK:
DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output.
HINT:
DTCs other than B1815/54, B1816/54, B1817/54 and B1818/54 may be output at this time, but they are not related to this check.
| OK |
|
|
|
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 the SST from connector E.
(d) Check that the connector is properly connected to the center airbag sensor assembly.
OK:
The connector is properly connected.
HINT:
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.
(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 instrument panel wire connector with the activation prevention mechanism is not deformed or damaged.
OK:
The short spring is not deformed or damaged.
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
|
4. |
CHECK INSTRUMENT PANEL WIRE (NO. 2 INSTRUMENT PANEL WIRE - CENTER AIRBAG SENSOR ASSEMBLY) |
(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 |
|---|---|---|
|
DC1-3 (P2+) - Body ground |
Ignition switch ON |
Below 1 V |
|
DC1-4 (P2-) - Body ground |
Ignition switch ON |
Below 1 V |
Text in Illustration
|
*1 |
Front Passenger Side Squib 2nd Step |
|
*2 |
No. 2 Instrument Panel Wire |
|
*3 |
Instrument Panel Wire |
|
*4 |
Center Airbag Sensor Assembly |
|
*5 |
Connector C |
|
*a |
Rear view of wire harness connector (to No. 2 Instrument Panel Wire) |
(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 |
|---|---|---|
|
DC1-3 (P2+) - DC1-4 (P2-) |
Always |
Below 1 Ω |
(g) Release the activation prevention mechanism built into connector B (See page
).
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DC1-3 (P2+) - DC1-4 (P2-) |
Always |
1 MΩ or higher |
|
DC1-3 (P2+) - Body ground |
Always |
1 MΩ or higher |
|
DC1-4 (P2-) - Body ground |
Always |
1 MΩ or higher |
(i) Restore the released activation prevention mechanism of connector B to the original condition.
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
|
5. |
CHECK CONNECTOR |
(a) Check that the connectors that link the instrument panel wire and No. 2 instrument panel wire harness are properly connected.
OK:
The connectors are properly connected.
HINT:
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
(b) Disconnect the connectors that link the instrument panel wire and No. 2 instrument panel wire.
(c) Check that the terminals of the connectors are not damaged.
OK:
The terminals are not deformed or damaged.
(d) Check that the short spring for the No. 2 instrument panel wire assembly connector with the activation prevention mechanism is not deformed or damaged.
OK:
The short spring is not deformed or damaged.
| NG |
|
REPLACE NO. 2 INSTRUMENT PANEL WIRE OR INSTRUMENT PANEL WIRE |
|
|
6. |
CHECK NO. 2 INSTRUMENT PANEL WIRE (FRONT PASSENGER SIDE SQUIB - INSTRUMENT PANEL WIRE) |
|
(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 |
|---|---|---|
|
C2-2 (P2+) - Body ground |
Ignition switch ON |
Below 1 V |
|
C2-1 (P2-) - Body ground |
Ignition switch ON |
Below 1 V |
Text in Illustration
|
*1 |
Front Passenger Side Squib 2nd Step |
|
*2 |
No. 2 Instrument Panel Wire |
|
*3 |
Instrument Panel Wire |
|
*4 |
Center Airbag Sensor Assembly |
|
*5 |
Connector E |
|
*6 |
Color: Black |
|
*a |
Front view of wire harness connector (to Front Passenger Side Squib 2nd Step) |
(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 |
|---|---|---|
|
C2-2 (P2+) - C2-1 (P2-) |
Always |
Below 1 Ω |
(g) Release the activation prevention mechanism built into connector D (See page
).
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C2-2 (P2+) - C2-1 (P2-) |
Always |
1 MΩ or higher |
|
C2-2 (P2+) - Body ground |
Always |
1 MΩ or higher |
|
C2-1 (P2-) - Body ground |
Always |
1 MΩ or higher |
(i) Restore the released activation prevention mechanism of connector D to the original condition.
| NG |
|
REPLACE NO. 2 INSTRUMENT PANEL WIRE |
|
|
7. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
|
(a) Connect the connectors to the front passenger airbag assembly, the No. 2 instrument panel wire, the instrument panel wire and the center airbag sensor assembly. |
|
(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 in the 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 the DTCs (See page
).
OK:
DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output.
Text in Illustration
|
*1 |
Front Passenger Side Squib 2nd Step |
|
*2 |
Center Airbag Sensor Assembly |
|
*4 |
DTC 54 |
|
*a |
Front view of DLC3 |
HINT:
DTCs other than B1815/54, B1816/54, B1817/54 and B1818/54 may be output at this time, but they are not related to this check.
| OK |
|
| NG |
|
|
|