Diagnostic System Check

DIAGNOSTIC SYSTEM CHECK

CAUTION:
- Refer to SIR Special Tool Caution in Service Precautions.
- 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 find and repair SIR system malfunctions. For best results, use the diagnostic tables and follow the sequence listed below:
1. Refer to the diagnostic tables as directed by the Diagnostic System Check-Restraint Systems. The diagnostic tables will assist you in diagnosing SIR system malfunctions. Bypassing these procedures may result in the following:
- Extended diagnostic time
- Incorrect diagnosis
- Incorrect parts replacement
2. Repeat the 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 verify that no other SIR system malfunctions exist.

TEST DESCRIPTION

Steps 1-8:

The numbers below refer to the step numbers on the diagnostic table.
1. This step checks to see if the AIR BAG indicator flashes seven times when the ignition is first 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 SDM.
4. This step checks to see if there are any current or history 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 is present.
7. This step checks to see if DTC B0092 or B0098 is present.
8. This step checks to see if there are any current of history passenger presence system (PPS) flash codes present.