DESCRIPTION
The side squib RH circuit consists of the airbag sensor assembly and the front seat airbag assembly RH.
The circuit signals the SRS to deploy when airbag deployment conditions are met.
These DTCs are set when a malfunction is detected in the side squib RH circuit.
DTC No. |
DTC Detecting Conditions |
Trouble Areas |
---|---|---|
B1820/55 |
|
|
B1821/55 |
|
|
B1822/55 |
|
|
B1823/55 |
|
|
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 ).
HINT:
PROCEDURE
1. |
CHECK DTC |
(a) Proceed to the appropriate step according to DTC readings.
(1) If using the Techstream (read the 5-digit DTCs):
Using the Techstream, check for DTCs (See page ).
Result
Result |
Proceed to |
---|---|
DTC B1820 is output. |
A |
DTC B1821 is output. |
B |
DTC B1822 is output. |
C |
DTC B1823 is output. |
D |
B |
GO TO STEP 3 |
C |
GO TO STEP 4 |
D |
GO TO STEP 5 |
|
2. |
CHECK FLOOR WIRE (FOR SHORT) |
(a) Release the activation prevention mechanism built into connector B (See page ). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S27-1 (SFR+) - S27-2 (SFR-) |
Always |
1 MΩ or Higher |
*1 |
Side Squib RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
A |
REPLACE FLOOR WIRE |
B |
GO TO STEP 6 |
3. |
CHECK FLOOR WIRE (FOR OPEN) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
A |
REPLACE FLOOR WIRE |
B |
GO TO STEP 7 |
4. |
CHECK FLOOR WIRE (TO GROUND) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
A |
REPLACE FLOOR WIRE |
B |
GO TO STEP 7 |
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 |
---|---|---|
S27-1 (SFR+) - Body ground |
Ignition switch ON |
Below 1 V |
S27-2 (SFR-) - Body ground |
Ignition switch ON |
Below 1 V |
*1 |
Side Squib RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
A |
REPLACE FLOOR WIRE |
B |
GO TO STEP 7 |
6. |
CHECK AIRBAG SENSOR ASSEMBLY |
(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 B1820 is not output.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Airbag Sensor Assembly |
HINT:
DTCs other than B1820 may be output at this time, but they are not related to this check.
Result
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
A |
REPLACE AIRBAG SENSOR ASSEMBLY |
B |
GO TO STEP 8 |
7. |
CHECK AIRBAG SENSOR ASSEMBLY |
HINT:
If continuing from step 5, begin from (a). If continuing from any other step, begin from (c).
(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 airbag sensor assembly.
(d) Using a service wire, connect S27-1 (SFR+) and S27-2 (SFR-) of connector C.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting.
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Clear the DTCs stored in the memory (See page ).
(h) Turn the ignition switch off.
(i) Turn the ignition switch to ON, and wait for at least 60 seconds.
(j) Check for DTCs (See page ).
OK:
DTC B1821, B1822 and B1823 are not output.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Floor Wire |
*3 |
Airbag Sensor Assembly |
*4 |
Service Wire |
HINT:
DTCs other than B1821, B1822 or B1823 may be output at this time, but they are not related to this check.
NG |
REPLACE AIRBAG SENSOR ASSEMBLY |
|
8. |
CHECK FRONT SEAT AIRBAG ASSEMBLY RH |
HINT:
If continuing from step 9, begin from (c). If continuing from any other step, being from (a).
(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 service wire from connector C.
(d) Connect the connector to the front seat airbag assembly RH (Side squib RH).
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Clear any DTCs stored in the memory (See page ).
(h) Turn the ignition switch off.
(i) Turn the ignition switch to ON, and wait for at least 60 seconds.
(j) Check for DTCs (See page ).
OK:
DTC B1820, B1821, B1822 and B1823 are not output.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Airbag Sensor Assembly |
HINT:
DTCs other than B1820, B1821, B1822 or B1823 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE FRONT SEAT AIRBAG ASSEMBLY RH |
Precaution
PRECAUTION
1. HANDLING PRECAUTIONS FOR STEERING SYSTEM
(a) Care must be taken when replacing parts. Incorrect replacement could affect
the performance of the steering system and result in driving hazards.
2. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM
(a) The vehicle is equipped with SRS (Suppl ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the causes of the problem symptom.
The potential causes of the symptoms are listed in order of probability
in the "Suspected Area" column of the table. Check each symptom by checking
the suspected area ...
Noise Occurs
PROCEDURE
1.
NOISE CONDITION
(a) Check from which direction the noise comes (front left or right, or rear
left or right).
OK:
The location of the noise source can be determined.
NG
GO TO STEP 3
OK
...