B1409

B1409 SIDE IMPACT SENSOR(SIS) DRIVER COMMUNICATION ERROR

CIRCUIT DESCRIPTION

Wiring Diagram:

The release system for the airbag consists of the SRSCM and two SIS - one on the left - hand side and one on the right. The above DTCs are recorded when a defect or communication error of the SIS is detected in the SIS circuit.

INSPECTION PROCEDURE

1. Preparation
1. Disconnect the negative (-) terminal cable from the battery, and wait at least 30 seconds.
2. Remove the DAB module.
3. Disconnect the connectors of the PAB, left and right side airbags, belt pretensioners and SIS.




4. Disconnect the SRSCM connector.

CAUTION: Place the DAB with the front surface facing upward.




2. Check SIS circuit (communication error).

[PREPARATION]
Check continuity between the SRSCM connector and the SIS connector as high (+) and high, low (-) and low (-).

OK : Continuity

[NG]-> Repair or replace the harness between the SRSCM and the SIS.

[OK]->

3. Check the SIS (defect).

[PREPARATION]
1. Turn the ignition switch to LOCK.
2. Disconnect the negative (-) terminal cable from the battery, and wait for 30 seconds.
3. Connect the SIS connector.




4. Connect the negative (-) terminal cable to the battery, and wait for 30 seconds.

[CHECK]
1. Turn the ignition switch to ON, and wait for at least 30 seconds.
2. Clear the malfunction code stored in the memory of the Hi-Scan Pro.
3. Turn the ignition switch to LOCK, and wait for 30 seconds.
4. Turn the ignition switch to ON, and wait for 30 seconds.
5. Using the Hi-Scan Pro, check DTC. There is no DTC.

[HINT]
Codes other than these may be output at this time, but they are not relevant to this check.

[NG]-> Replace the SIS.

[OK]-> From the results of the above inspection, the malfunctioning part can now be considered normal.