Component Location
Fig.1) SRSCM
General Description
Airbag Control Unit (SRSCM : Supplemental Restraints System Control Module) must set a specification which is agreed with the vehicle in the end of line (EOL) for plant.
As the same conception, the function of "ACU Variant Coding" is to set a specification of an ACU.
Due to failure in the SRSCM, if you would replace ACU in the vehicle, must perform the ACU Variant Coding.
Since a new SRSCM is normally supplied with undetermined state, the ACU has to be set up based on the vehicle specifications by operating ACU Variant Coding procedure.
The SRSCM checks its specifications in it in order to run its airbag system normally.
If the warning light of airbag is flickering continuously, that is because SRSCM(ACU) Variant Coding is not completed.
noteSRSCM Variant Coding is available only one time. And when it is already finished, it is impossible to retry SRSCM Variant Coding.
Warning lamp's operation during SRSCM(ACU) Variant Coding Mode
It will be flickering on every 1 second before the Variant Coding is properly done.
DTC Description
To perform the airbag system normally, check if there is an incorrect vehicle specifications at performing SRSCM(ACU) Variant Coding. This DTC is set up if SRSCM's variant code doesn't match with the entering variant code at performing SRSCM(ACU) Variant Coding procedure.
DTC Detecting Condition
Item | Detecting Condition | Possible cause |
DTC Strategy | SRSCM Coding
| SRSCM(ACU) Variant Coding error. Incorrect ACU Coding Code Input. Checking for the specification of Vehicle. SRSCM's connector and circuit Check SRSCM. First check the information code in the status of this DTC, and then check the vehicle and SRSCM. |
Enable Conditions | SRSCM(ACU) Variant Coding Mode
|
Threshold Value | Incorrect variant code entering at SRSCM(ACU) Variant Coding mode (ACU has not been locked yet.)
|
Diagnostic Time | Qualification | Immediately
|
De-Qualification | Immediately
|