DESCRIPTION
The side squib RH circuit consists of the center airbag sensor assembly and front seat side airbag assembly RH.
The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the side squib RH circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1820/55 |
|
|
B1821/55 |
|
|
B1822/55 |
|
|
B1823/55 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
CHECK CONNECTORS |
(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 connectors are properly connected to the front seat side airbag assembly RH and center airbag sensor assembly.
OK:
The connectors are properly connected.
HINT:
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
(d) Disconnect the connectors from the front seat side airbag assembly RH and center airbag sensor assembly.
(e) Check that the terminals of the connectors are not damaged.
OK:
The terminals are not deformed or damaged.
(f) Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.
OK:
The short spring is not deformed or damaged.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Center Airbag Sensor Assembly |
*3 |
No. 2 Floor Wire |
NG |
REPLACE NO. 2 FLOOR WIRE |
|
2. |
CHECK FRONT SEAT SIDE AIRBAG ASSEMBLY RH (SIDE SQUIB RH) |
(a) Connect the connector to the center airbag sensor assembly. |
|
(b) Connect SST (resistance 2.1 Ω) to connector C.
CAUTION:
Never connect an electrical tester to the front seat side airbag assembly RH (side squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
SST: 09843-18061
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in 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 ).
OK:
DTC B1820, B1821, B1822, B1823 or 55 is not output.
HINT:
Codes other than DTCs B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Center Airbag Sensor Assembly |
*3 |
Front view of wire harness connector (to Front Seat Side Airbag Assembly RH) |
*4 |
Connector C |
OK |
REPLACE FRONT SEAT SIDE AIRBAG ASSEMBLY RH |
|
3. |
CHECK NO. 2 FLOOR WIRE (SIDE SQUIB RH CIRCUIT) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect SST from connector C.
(d) Disconnect the No. 2 floor wire from the center airbag sensor assembly.
(e) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
Mz1-1 (SFR+) - Body ground |
Ignition switch ON |
Below 1 V |
Mz1-2 (SFR-) - Body ground |
Ignition switch ON |
Below 1 V |
(f) Check for an open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Mz1-1 (SFR+) - Mz1-2 (SFR-) |
Always |
Below 1 Ω |
(g) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Mz1-1 (SFR+) - Body ground |
Always |
1 MΩ or higher |
Mz1-2 (SFR-) - Body ground |
Always |
1 MΩ or higher |
(h) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B (See page ).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Mz1-1 (SFR+) - Mz1-2 (SFR-) |
Always |
1 MΩ or higher |
*1 |
Side Squib RH |
*2 |
Center Airbag Sensor Assembly |
*3 |
No. 2 Floor Wire |
*4 |
Front view of wire harness connector (to Front Seat Side Airbag Assembly RH) |
*5 |
Connector C |
NG |
REPLACE NO. 2 FLOOR WIRE |
|
4. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Restore the released activation prevention mechanism of connector B to the original condition. |
|
(b) Connect the connectors to the front seat side airbag assembly RH and center airbag sensor assembly.
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in 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 ).
OK:
DTC B1820, B1821, B1822, B1823 or 55 is not output.
Text in Illustration
*1 |
Side Squib RH |
*2 |
Center Airbag Sensor Assembly |
HINT:
Codes other than DTCs B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
Assist Map Number Mismatch (C1582)
DESCRIPTION
When an incorrect ECM or brake actuator assembly (skid control ECU) is installed
after the assist map has been recorded in the power steering ECU, then DTC C1582
is stored because the data does not match the vehicle specifications.
...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because in ...
Initialization
INITIALIZATION
NOTICE:
Initialize the headlight leveling ECU assembly (set the zero point of
the height control sensor in the headlight leveling ECU assembly) after
the vehicle height changes due to replacement of the suspension or after
...