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B1401

B1401 SIDE IMPACT SENSOR(SIS) DRIVER SIDE SHORT TO GROUND

CIRCUIT DESCRIPTION

Circuit Description:




Wiring Diagram:




The squib circuit consists of the SRSCM. clock spring, DAB, PAB, SAB, BPT, and SIS. It causes the SRS to deploy when the SRS deployment conditions are satisfied. The above DTCs are recorded when a short to ground is detected in a squib circuit.

INSPECTION PROCEDURE
1. Preparation
1. Disconnect 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 airbag, space belt pretensioner and SIS.
4. Disconnect the connector of the SRSCM.

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




2. Check DAB squib circuit.

[CHECK]
For the connector (on the clock spring side) between clock spring and DAB, measure the resistance between DAB high and body ground.

Resistance:

[NG]-> Go to step "13"

[OK]-> Go to step "8"




3. Check the PAB squib circuit.

[CHECK]
For the connector (on the SRSCM side) between SRSCM and PAB, measure the resistance between high and body ground.

Resistance :

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

[OK]-> Go to step "9"




4. Check PSAB and DSAB squib circuits.

[CHECK]
For the connector (on the SRSCM side) between SRSCM and the SABs, measure the resistance between the SABs high and body ground.

Resistance :

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

[OK]-> Go to step "10"




5. Check the BPTs squib circuit.

[CHECK]
For the connector (on the SRSCM side) between the SRSCM and BPT, measure the resistance between the BPTs high and body ground.

Resistance:

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

[OK]-> Go to step "11"




6. Check the SIS circuit.

[CHECK]
For the connector (on the SRSCM side) between the SRSCM and the SIS, measure the resistance between the SIS high and body ground.

Resistance :

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

[OK]-> Go to step "12"

7. Check the SRSCM.

[PREPARATION]
1. Connect the connector to SRSCM.
2. Using a service wire, connect the DAB high and DAB low on the clock spring side of connector.
3. Using a service wire, connect the PAB high and low on SRSCM side of connector.
4. Connect the SABs and BPT using the same method.




5. Connect the negative (-) terminal cable to battery, and wait it least 30 seconds.

[CHECK]
1. Turn ignition switch to ON, and wait for at least 30 seconds.
2. Clear any codes stored in the memory with 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 for DTCs. 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 SRSCM.

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

8. Check the DAB squib.

[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 DAB 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 for DTCs. There is no DTC.

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

[NG]-> Replace the DAB.

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

9. Check the PAB squib.

[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 PAB connector.




4. Connect the negative (-) terminal cable from 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 with 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 for DTCs. There is no DTC.

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

[NG]-> Replace the PAB.

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

10. Check the SABs squib.

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




4. Connect the negative (-) terminal cable from the battery and wait at least 30 seconds.

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

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

NOTE: Check the DSAB using the same procedure.

[NG]-> Replace the SAB.

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

11. Check the BPT squib.

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




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

[CHECK]
1. Turn the ignition switch to ON, and wait for 30 seconds.
2. Clear the malfunction code stored in the memory with 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 for DTCs. There is no DTC.

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

[NG]-> Replace the BPT.

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

12. Check the SIS.

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




4. Connect the negative (-) terminal cable from the battery and wait at least 30 seconds.

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

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

[NG]-> Replace the SIS.

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




13. Check clock spring circuit.

[PREPARATION]
Disconnect connector between SRSCM and clock spring.

[CHECK]
Measure resistance between the DAB high on the clock spring side of connector between clock spring and DAB and body ground.

Resistance :

[NG]-> Replace the clock spring.

[OK]-> Repair or replace the harness or the connector between the SRSCM and the clock spring.

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