Restraint System Diagnosis

CIRCUIT DESCRIPTION
When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) compares the restraints ID stored in the SDM to the restraints ID stored in the body control module (BCM). The restraints ID being compared contains the last four digits of the SDM part number. For more detailed information concerning Class 2 serial data lines, refer to Data Link Communications Description and Operation in Data Link Communications.

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

ACTION TAKEN WHEN THE DTC SETS
- The SDM disables all AIR BAG deployments.
- The SDM commands the AIR BAG indicator ON via Class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
- The condition responsible for setting the DTC no longer exists.
- You issue a scan tool CLEAR DTCs command.
- A history DTC will clear once 255 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
DTC B1001 is an indication that the restraints ID stored in both the BCM and SDM do not match. If either the BCM or PCM were replaced, the replacement modules need to be reprogrammed for proper operation. In addition, if the BCM or SDM were replaced, the vehicle theft deterrent (VTD) system will also need to be reprogrammed.

TEST DESCRIPTION

Steps 1-4:

Steps 5-9:

The numbers below refer to the step numbers on the diagnostic table.
2. This step checks to see if the correct VIN is programmed in the PCM.
3. This step explains the proper steps to perform after a PCM has been replaced in order for the PCM to operate properly.
5. This step explains the proper steps to perform after a BCM has been replaced in order for the BCM to operate properly.
8. This step explains how to properly program the vehicle theft deterrent (VTD) system.