Restraint System Diagnosis
DTC B1001CIRCUIT DESCRIPTION
After enter RUN mode, the inflatable restraint sensing and diagnostic module (SDM) receives the VIN from BCM, via class 2 serial data circuit. SDM receives also a message from BCM containing its restraints ID. The restraints ID contains the last four digits of the SDM part number. The module compares the information stored in its memory with the information received from the BCM.
CONDITIONS FOR RUNNING THE DTC
Battery voltage is between 9-16 volts.
CONDITIONS FOR SETTING THE DTC
The restraints ID that is stored in the SDM does not match the restraints ID that is stored in the BCM or the VIN information that is stored in the SDM does not match the VIN information that is stored in the BCM.
ACTION TAKEN WHEN THE DTC SETS
The following module specific actions may occur:
- The SDM commands the AIR BAG indicator ON via class 2 serial data circuit.
- The SDM disables all deployment loops.
CONDITIONS FOR CLEARING THE DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
DIAGNOSTIC AIDS
DTC B1001 is an indication that the restraints ID or the VIN stored in both the BCM and SDM do not match. If any of the modules mentioned above were replaced, the replaced module need to be reprogrammed for proper operation.
TEST
