Diagnostic System Check - Restraint Systems

Diagnostic System Check - Restraint Systems

CAUTION: Refer to Restraint Systems Special Tool Caution in Cautions and Notices.

CAUTION: If the vehicle interior is exposed to moisture and becomes soaked up to the level of the sensing and diagnostic module (SDM), the SDM and SDM harness connector must be replaced. The SDM could be activated when powered, which could cause airbag deployment and result in personal injury.

These diagnostic procedures will help you to find and repair Restraint Systems system malfunctions. This service category also contains information for repairing Restraint Systems system malfunctions. For best results, use the diagnostic tables, and follow the sequence listed below:

1. Perform the A Diagnostic System Check - Restraint Systems. All Restraint Systems diagnostics must begin with the A Diagnostic System Check - Restraint Systems. The A Diagnostic System Check - Restraint Systems determines the following results:
- Proper AIR BAG warning lamp operation
- Ability of the SDM to communicate through the data link connector (DLC)
- Existence of Restraint Systems current and/or history diagnostic trouble codes (DTC)

2. Refer to the diagnostic table as directed by the A Diagnostic System Check - Restraint Systems. The diagnostic tables will help enable you to diagnose any Restraint Systems system malfunction. Bypassing these procedures may result in the following problems:
- Extended diagnostic time
- Incorrect diagnosis
- Incorrect parts replacement

3. Repeat the A Diagnostic System Check-Restraint Systems after you perform any repairs or diagnostic procedures. This will verify that you correctly performed the repair. This will also ensure that no other malfunctions exist.

Step 1 - 5:

Step 6:

Test Description
The numbers below refer to the step numbers on the diagnostic table.
1. This step checks to see if the AIR BAG warning lamp flashes seven times and then turns off when the ignition key is turned ON.
2. This step checks to see if the scan tool powers up.
3. This step checks to see if the scan tool can communicate with the inflatable restraint sensing and diagnostic module (SDM).
4. This step checks to see if there are any current or history diagnostic trouble codes (DTCs) present.
5. This step checks to see if there are communication DTCs (U-codes) present.
6. This step checks to see if DTC B1000 (ECU Malfunction) is present.