DESCRIPTION
The side airbag sensor assembly RH consists of parts such as the safing sensor, the diagnostic circuit and the lateral deceleration sensor.
When the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1620/21 is set when a malfunction is detected in the side airbag sensor assembly RH and rear airbag sensor RH circuit.
DTC No. |
DTC Detecting Conditions |
Trouble Areas |
---|---|---|
B1620/21 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal. Therefore, make sure to read the
disconnecting the cable from the negative (-) battery terminal notices before proceeding
with work (See page ).
PROCEDURE
1. |
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 airbag sensor assembly and the side airbag sensor assembly RH.
OK:
The connectors are properly connected.
NG | ![]() |
CONNECT CONNECTORS |
|
2. |
CHECK CONNECTORS |
(a) Check that the connectors (on the airbag sensor assembly side and side airbag
sensor assembly RH side) are not damaged (See page
).
OK:
The connectors are not deformed or damaged.
NG | ![]() |
REPLACE WIRE HARNESS |
|
3. |
CHECK FLOOR WIRE (FOR OPEN) |
(a) Disconnect the connectors from the airbag sensor assembly and the side airbag sensor assembly RH. |
|
(b) Using service wire, connect S12-4 (BBR+) and S12-3 (BBR-) of connector C.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A23-8 (BBR+) - A23-11 (BBR-) |
Always |
Below 1 Ω |
*1 |
Side Airbag Sensor Assembly RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
*4 |
Service Wire |
NG | ![]() |
REPLACE FLOOR WIRE |
|
4. |
CHECK FLOOR WIRE (FOR SHORT) |
(a) Disconnect the service wire from connector C. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A23-8 (BBR+) - A23-11 (BBR-) |
Always |
1 MΩ or Higher |
*1 |
Side Airbag Sensor Assembly RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
NG | ![]() |
REPLACE FLOOR WIRE |
|
5. |
CHECK FLOOR WIRE (TO B+) |
(a) Connect the negative (-) terminal cable to the battery, 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 |
---|---|---|
A23-8 (BBR+) - Body ground |
Ignition switch ON |
Below 1 V |
A23-11 (BBR-) - Body ground |
Ignition switch ON |
Below 1 V |
*1 |
Side Airbag Sensor Assembly RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
NG | ![]() |
REPLACE FLOOR WIRE |
|
6. |
CHECK FLOOR WIRE (TO GROUND) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A23-8 (BBR+) - Body ground |
Always |
1 MΩ or Higher |
A23-11 (BBR-) - Body ground |
Always |
1 MΩ or Higher |
*1 |
Side Airbag Sensor Assembly RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
NG | ![]() |
REPLACE FLOOR WIRE |
|
7. |
CHECK SIDE AIRBAG SENSOR ASSEMBLY RH |
(a) Connect the connectors to the airbag sensor assembly.
(b) Interchange the side airbag sensor assembly RH with the side airbag sensor assembly LH and connect the connectors to them.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear any 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 for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC B1620/21 is output. |
A |
DTC B1625/22 is output. |
B |
Neither DTC B1620/21 nor B1625/22 is output. |
C |
B | ![]() |
REPLACE REAR AIRBAG SENSOR RH |
C | ![]() |
USE SIMULATION METHOD TO CHECK |
|
8. |
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 airbag sensor assembly and the side airbag sensor assembly RH.
OK:
The connectors are properly connected.
NG | ![]() |
CONNECT CONNECTORS |
|
9. |
CHECK CONNECTORS |
(a) Check that the connectors (on the side airbag sensor assembly RH side and
rear airbag sensor RH side) are not damaged (See page
).
OK:
The connectors are not deformed or damaged.
NG | ![]() |
REPLACE WIRE HARNESS |
|
10. |
CHECK FLOOR WIRE (FOR OPEN) |
(a) Disconnect the connectors from the side airbag sensor assembly RH and the rear airbag sensor RH. |
|
(b) Using service wire, connect S14-1 (BCR-) and S14-2 (BCR+) of connector C.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S12-1 (BCR+) - S12-2 (BCR-) |
Always |
Below 1 Ω |
*1 |
Rear Airbag Sensor RH |
*2 |
Side Airbag Sensor Assembly RH |
*3 |
Service Wire |
NG | ![]() |
REPLACE FLOOR WIRE |
|
11. |
CHECK FLOOR WIRE (FOR SHORT) |
(a) Disconnect the service wire from connector C. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S12-1 (BCR+) - S12-2 (BCR-) |
Always |
1 MΩ or Higher |
*1 |
Rear Airbag Sensor RH |
*2 |
Side Airbag Sensor Assembly RH |
NG | ![]() |
REPLACE FLOOR WIRE |
|
12. |
CHECK FLOOR WIRE (TO B+) |
(a) Connect the negative (-) terminal cable to the battery, 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 |
---|---|---|
S12-1 (BCR+) - Body ground |
Ignition switch ON |
Below 1 V |
S12-2 (BCR-) - Body ground |
Ignition switch ON |
Below 1 V |
*1 |
Rear Airbag Sensor RH |
*2 |
Side Airbag Sensor Assembly RH |
NG | ![]() |
REPLACE FLOOR WIRE |
|
13. |
CHECK FLOOR WIRE (TO GROUND) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S12-1 (BCR+) - Body ground |
Always |
1 MΩ or Higher |
S12-2 (BCR-) - Body ground |
Always |
1 MΩ or Higher |
*1 |
Rear Airbag Sensor RH |
*2 |
Side Airbag Sensor Assembly RH |
NG | ![]() |
REPLACE FLOOR WIRE |
|
14. |
CHECK DTC |
(a) Connect the connectors to the 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 any 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 B1620/21 is not output.
HINT:
DTCs other than B1620/21 may be output at this time, but they are not related to this check.
Result
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
B | ![]() |
REPLACE REAR AIRBAG SENSOR RH |
|
15. |
CHECK SIDE AIRBAG SENSOR ASSEMBLY RH |
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the airbag sensor assembly (See page
).
HINT:
Perform the inspection using parts from a normal vehicle when possible.
(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 any 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 B1620/21 is not output.
HINT:
DTCs other than B1620/21 may be output at this time, but they are not related to this check.
OK | ![]() |
END |
NG | ![]() |
REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH |
Steering Angle Sensor Power Source Voltage Malfunction (C1432)
DESCRIPTION
The skid control ECU (brake actuator assembly) outputs this DTC when it receives
a sensor power source malfunction signal from the steering angle sensor.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1432
...
Front Radar Sensor (C1A10)
DESCRIPTION
C1A10 is output when there is an internal malfunction in the millimeter wave
radar sensor assembly.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
C1A10
Front Radar Sensor
W ...
Center Airbag Sensor Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Center Airbag Sensor Communication Stop Mode
Either condition is met:
Communication stop for "Airbag" is indicated on the "Communication
Bus Check" sc ...