- The center airbag sensor assembly receives an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit for 2 seconds.
- Passenger airbag ON/OFF indicator malfunction
- Center airbag sensor assembly malfunction
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJR2 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1660/43; Passenger Airbag ON/OFF Indicator Circuit Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B1660/43 |
Passenger Airbag ON/OFF Indicator Circuit Malfunction |
DESCRIPTION
The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and the passenger airbag ON/OFF indicator.
The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag assembly.
DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1660/43 |
When one of following conditions is met: |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION |
(a) Turn the ignition switch to ON.
(b) Check the passenger airbag ON/OFF indicator operation.
HINT:
Refer to the normal condition of the passenger airbag ON/OFF indicator (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DIAGNOSIS SYSTEM](/t3Portal/stylegraphics/info.gif)
).
Result
|
ON/OFF Indicator Illumination |
Proceed to |
|---|---|
|
Always ON |
A |
|
OFF |
B |
| B |
|
|
|
2. |
CHECK CONNECTION OF CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and the air conditioning control assembly.
OK:
The connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
3. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor assembly and the air conditioning control assembly.
(b) Check that the connectors (on the center airbag sensor assembly side and air conditioning control assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
|
4. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR |
(a) Connect the connector to the air conditioning control assembly.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON.
(d) Check the passenger airbag ON/OFF indicator operation.
OK:
The passenger airbag ON/OFF indicator does not come on.
| NG |
|
|
|
5. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Connect the connector to the center airbag sensor assembly.
(b) Connect the negative (-) terminal cable to the battery, 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 for DTCs (See page
).
OK:
DTC B1660/43 is not output.
Text in Illustration
|
*1 |
Air Conditioning Control Assembly |
|
*2 |
Center Airbag Sensor Assembly |
HINT:
DTCs other than B1660/43 may be output at this time, but they are not related to this check.
| OK |
|
| NG |
|
|
6. |
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - AIR CONDITIONING CONTROL ASSEMBLY) |
Text in Illustration
|
*1 |
Air Conditioning Control Assembly |
*2 |
Center Airbag Sensor Assembly |
|
*3 |
Instrument Panel Wire |
*4 |
Connector C |
|
*5 |
Connector B |
*6 |
Service Wire |
|
*a |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
*b |
Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the air conditioning control assembly and center airbag sensor assembly.
(d) Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - D69-2 (P-AB) |
Always |
Below 1 Ω |
(f) Disconnect the service wire from connector B.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - D69-2 (P-AB) |
Always |
1 MΩ or higher |
|
D69-7 (PAON) - Body ground |
Always |
1 MΩ or higher |
|
D69-2 (P-AB) - Body ground |
Always |
1 MΩ or higher |
(h) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(i) Turn the ignition switch to ON.
(j) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - Body ground |
Ignition switch ON |
Below 1 V |
|
D69-2 (P-AB) - Body ground |
Ignition switch ON |
Below 1 V |
| OK |
|
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
7. |
CHECK CONNECTION OF CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and the air conditioning control assembly.
OK:
The connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
8. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor assembly and the air conditioning control assembly.
(b) Check that the connectors (on the center airbag sensor assembly side and air conditioning control assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
|
9. |
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - AIR CONDITIONING CONTROL ASSEMBLY) |
Text in Illustration
|
*1 |
Air Conditioning Control Assembly |
*2 |
Center Airbag Sensor Assembly |
|
*3 |
Instrument Panel Wire |
*4 |
Connector C |
|
*5 |
Connector B |
*6 |
Service Wire |
|
*a |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
*b |
Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the air conditioning control assembly and center airbag sensor assembly.
(d) Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - D69-2 (P-AB) |
Always |
Below 1 Ω |
(f) Disconnect the service wire from connector B.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - D69-2 (P-AB) |
Always |
1 MΩ or higher |
|
D69-7 (PAON) - Body ground |
Always |
1 MΩ or higher |
|
D69-2 (P-AB) - Body ground |
Always |
1 MΩ or higher |
(h) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(i) Turn the ignition switch to ON.
(j) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D69-7 (PAON) - Body ground |
Ignition switch ON |
Below 1 V |
|
D69-2 (P-AB) - Body ground |
Ignition switch ON |
Below 1 V |
| NG |
|
REPLACE INSTRUMENT PANEL WIRE |
|
|
10. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) |
(a) Connect the connectors to the center airbag sensor assembly.
(b) Connect the negative (-) terminal cable to the battery, 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 |
|---|---|---|
|
D69-4 (IG+) - Body ground |
Ignition switch ON |
11 to 14 V |
Text in Illustration
|
*1 |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
| NG |
|
REPLACE HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BATTERY) |
|
|
11. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connector to the air conditioning control assembly.
(d) Disconnect the connectors from the center airbag sensor assembly.
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON.
(g) Check the indicator according to the value(s) in the table below.
OK:
|
Tester Connection |
Switch Condition |
Passenger airbag ON/OFF indicator |
|---|---|---|
|
D150-23 (PAON) - Body ground |
Ignition switch ON |
"ON" comes on |
|
D150-17 (P-AB) - Body ground |
Ignition switch ON |
"OFF" comes on |
Text in Illustration
|
*1 |
Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
| NG |
|
|
|
12. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connectors to the center airbag sensor assembly.
(d) Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Clear the DTCs stored in the memory (See page
).
(g) Turn the ignition switch off.
(h) Turn the ignition switch to ON, and wait for at least 60 seconds.
(i) Check for DTCs (See page
).
OK:
DTC B1660/43 is not output.
Text in Illustration
|
*1 |
Air Conditioning Control Assembly |
|
*2 |
Center Airbag Sensor Assembly |
HINT:
DTCs other than B1660/43 may be output at this time, but they are not related to this check.
| OK |
|
| NG |
|
|
|