Circuit Description
When the ignition key is first turned to the RUN position, the inflatable restraint sensing and diagnostic module (SDM) compares the restraints ID that is stored in the SDM to the restraints ID that is stored in the BCM. The restraints ID that is being compared contains the last four digits of the SDM part number. Next, the SDM compares the VIN that is stored in the SDM to the VIN that is stored in the BCM. For more detailed information concerning the Class 2 data lines, refer to Data Link Communications Circuit Description in Data Link Communications.
Conditions for Setting the DTC
| • | Ignition 1 voltage is within the normal operating voltage range. |
| • | 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. |
This test is only run once during power up initialization.
Action Taken When the DTC Sets
| • | The SDM commands ON the AIR BAG warning lamp via Class 2 serial data. |
| • | The SDM disables all AIR BAG deployments. |
Conditions for Clearing the DTC
The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM and the VIN information that is stored in the SDM matches the VIN information that is stored in the BCM.
Diagnostic Aids
DTC B1001 is an indication that the restraints ID's stored in both the BCM and SDM do not match or that the VIN's stored in both the BCM and SDM do not match. If either the BCM and/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
The number(s) below refer to the step number(s) on the diagnostic table.
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This step checks to see if the correct VIN is programmed in the powertrain control module (PCM).
-
This step checks to see if the body control module (BCM) has been replaced.
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This step explains the proper steps to perform after a BCM has been replaced in order for the BCM to operate properly.
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This step checks to see if the correct VIN is programmed in the BCM.
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This step explains how to properly program the VIN into the BCM.
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This step checks to see if the SDM has been replaced.
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This step explains how to properly program the Vehicle Theft Deterrent (VTD) System.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
Is the PCM programmed with the correct VIN? | -- | |||
3 | Use the scan tool and/or the techline machine to program the correct VIN into the PCM. Is the programming procedure complete? | -- | -- | |
Was the BCM replaced? | -- | |||
Program the BCM in order for the BCM to learn the Restraints ID from the SDM. Refer to Body Control Module (BCM) Programming/RPO Configuration Did you complete the programming procedures? | -- | -- | ||
Use the scan tool to verify that the BCM is programmed with the correct VIN by comparing the VIN that is stored in the BCM to the VIN that is stored in the VCM. Is the BCM programmed with the correct VIN? | -- | |||
Program the correct VIN into the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration Did you complete the programming procedure? | -- | -- | ||
Was the SDM replaced? | -- | |||
9 |
Did you complete the replacement? | -- | -- | |
Reprogram the vehicle theft deterrent (VTD) system. Refer to PASSLOCK Reprogramming Seed and Key in Theft Deterrent. Important: Use the scan tool to perform the VTD relearn. Do not use the 30 minute manual procedure. Did you complete the reprogramming procedure? | -- | -- | ||
11 |
Are all the SIR components properly mounted and connected? | -- | -- |
