4.
Using a scantool, clear the DTC.
In collision, SRSCM sends current to pertinent air bag for deployment. Besides SRSCM performs diagnosis of overall air bag system and light warning lamp if there's any fault in it. Main functions of SRSCM are as follows.
Collision and Passenger presence Detection.
Determination of BPT and air bag deployment in accordane with given condition.
Internal and external diagnosis of air bag system.
Warning by warning lamp if there's any fault in airbag system.
Proffering data for scantool diagnosis.
[B1657] The SRSCM sets DTC B1657 if any BPT deploys.
[B1658] When the Crash (Belt pretentioner 6times depoyment) recorded in the SRSCM.
Item | Detecting Condition | Possible cause | ||
DTC Strategy | ● Check BPT deployment | ● SRSCM. ● Belt pretensioner. | ||
Enable Conditions | ● Ignition "ON" | |||
Diagnostic Time | Qualification | ● N/A | ||
De-Qualification | B1657 | ● - | ||
B1658 | ● ∞ (dequalification not permitted) | |||
Ignition "OFF", connect scantool.
Ignition "ON"＆ Engine "OFF", select "Diagnostic Trouble Codes(DTC)" mode.
Monitor diagnostic trouble code and present of trouble code.
Using a scantool, clear the DTC.
Is DTC present problem ?
▶ DTC caused by deployment of BPT. Substitute with a SRSCM and check for proper operation. If the problem is corrected, replace SRSCM and then go to "Verification of Vehicle Repair" procedure.
Refer to the DESCRIPTION in this TROUBLESHOOTING section.
